locklost/plugins/darm.py

+import numpy as np
+import matplotlib.pyplot as plt
+
+from gwpy.timeseries import TimeSeries
+
+from .. import logger
+from .. import config
+from .. import plotutils
+
+
+DARM_CHANNEL = f'{config.IFO}:GDS-CALIB_STRAIN_CLEAN'
+
+##############################################
+
+
+def plot_darm(event):
+    """Grabs DARM data from 8 minutes before LL and right before
+    LL and plots them
+    """
+    # Only create DARM plot if we got a LL from NLN or above
+    if event.transition_index[0] < config.GRD_NOMINAL_STATE[0]:
+        logger.info('IFO not fully locked, DARM plot will not be created.')
+        return
+
+    plotutils.set_rcparams()
+    plt.rcParams['figure.figsize'] = (66, 24)
+
+    logger.info('Plotting DARM 8 minutes vs right before lockloss')
+
+    # Before time: between 8 and 9 minutes before LL
+    time_before = [int(event.gps) - (9*60), int(event.gps) - (8*60)]
+    # Right before LL time: 61 seconds to 1 second before LL
+    time_before_LL = [int(event.gps) - 61, int(event.gps) - 1]
+
+    # Grab the data
+    darm_before = TimeSeries.get(
+        DARM_CHANNEL,
+        time_before[0],
+        time_before[1],
+        frametype=f'{config.IFO}_HOFT_C00',
+        nproc=8,
+        verbose=True
+    )
+    darm_before_LL = TimeSeries.get(
+        DARM_CHANNEL,
+        time_before_LL[0],
+        time_before_LL[1],
+        frametype=f'{config.IFO}_HOFT_C00',
+        nproc=8,
+        verbose=True
+    )
+
+    # Calculate the Strain PSD
+    fft = 16
+    psd_before = darm_before.psd(fft, fft/2.).crop(10, 5000)
+    psd_before_LL = darm_before_LL.psd(fft, fft/2.).crop(10, 5000)
+
+    # Plot DARM comparison
+    plt.loglog(
+        np.sqrt(psd_before),
+        linewidth=1,
+        color='red',
+        label='Right before lockloss'
+    )
+    plt.loglog(
+        np.sqrt(psd_before_LL),
+        linewidth=1,
+        color='lightsteelblue',
+        label='8 min before lockloss'
+    )
+    plt.xlim(10, 5000)
+    plt.xlabel('Frequency [Hz]')
+    plt.ylabel(u'ASD [1/\u221AHz]')
+    plt.title(f'DARM - {DARM_CHANNEL}')
+    plt.suptitle(
+        'Note: not helpful if not in NLN 9 mins before lockloss',
+        size=35
+    )
+    plt.grid(which='both')
+    plt.legend()
+    plt.tight_layout()
+
+    outfile_plot = 'darm.png'
+    outpath_plot = event.path(outfile_plot)
+    plt.savefig(outpath_plot, bbox_inches='tight')

locklost/plugins/discover.py

-import glob
-import time
-import logging
-
-from gwpy.segments import Segment, SegmentList
+from gwpy.segments import Segment
 
+from .. import logger
 from .. import config
 from .. import data
 
-##################################################
-
-def find_shm_segments():
-    """Returns a segment list covering the span of available frame data from /dev/shm.
 
-    """
-    from lal.utils import CacheEntry
-    frames = glob.glob("/dev/shm/lldetchar/{}/*".format(config.IFO))
-    cache = map(CacheEntry.from_T050017, frames)
-    return SegmentList([e.segment for e in cache]).coalesce()
+##################################################
 
 
 def discover_data(event):
@@ -29,39 +18,14 @@ def discover_data(event):
     # use transition gps since it doesn't depend on refinement
     gps = event.transition_gps
 
-    ### use refine window to determine data query range
-    # gwdatafind requires integer segment times
-    query_segment = Segment(*config.REFINE_WINDOW).shift(int(gps))
-    query_segs = SegmentList([query_segment])
-    logging.info("querying for data in range: {} - {}".format(*query_segment))
+    # use refine window to determine data query range
+    segment = Segment(*config.REFINE_WINDOW).shift(int(gps))
 
-    ### first check if low-latency frames are available
-    logging.info("checking if data is available in /dev/shm...")
-    try:
-        shm_segs = find_shm_segments()
-    except ImportError as e:
-        logging.info("unable to check /dev/shm: {}".format(e))
-        shm_segs = Segment()
-    if query_segs & shm_segs == query_segs:
-        shm_end_time = shm_segs[-1][1]
-        query_end_time = query_segment[1]
-
-        ### check if time requested is too new, if so,
-        ### sleep until it is available
-        if query_end_time > shm_end_time:
-            time.sleep(query_end_time - shm_end_time)
-            shm_segs = find_shm_segments()
+    logger.info("querying for data in range: {} - {}".format(*segment))
 
-        ### check if span of data requested is all available
-        if query_segs & shm_segs == query_segs:
-            logging.info("queried data available in /dev/shm")
-            return True
-
-    ### if shm frames are not available for the time requested,
-    ### wait until raw frames from LDR are available
-    logging.info("no data available in /dev/shm, checking LDR...")
-    if data.frame_wait(query_segment):
-        logging.info("LDR data available")
-        return
+    try:
+        data.fetch([config.GRD_STATE_N_CHANNEL], segment)
+    except RuntimeError:
+        assert False, f"{config.DATA_DISCOVERY_TIMEOUT}s data discovery timeout reached"
 
-    raise RuntimeError("data discovery timeout reached, data not found")
+    logger.info("data available!")

locklost/plugins/etm_glitch.py

+import numpy as np
+import matplotlib.pyplot as plt
+from scipy import signal
+
+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+from .. import plotutils
+
+GLITCH_SEARCH_WINDOW = [-2.0, 0]
+GLITCH_CHANNEL = ['{}:SUS-ETMX_L3_MASTER_OUT_LR_DQ'.format(config.IFO)]
+THRESH = 2 * (10 ** 4)  # High threshold looking for glitches
+LOW_THRESH = 2 * (10 ** 4)  # Low threshold for number of zeroes
+LOW_TIME = 50 * (10 ** -3)  # Threshold for amount of time spent within LOW_GLITCH threshold
+
+
+##############################################
+
+
+def check_glitch(event):
+    """
+    This will use a 200Hz high-passed verion of GLITCH_CHANNEL to check for
+    any glitches prior to lockloss in two steps:
+    1. Is there a glitch that goes above THRESH in the GLITCH_SEARCH_WINDOW
+    If this is true:
+    2. Does the channel remain within LOW_THRESH for at least LOW_TIME
+    """
+    if config.IFO == 'L1':
+        logger.info("NOT SET UP FOR LLO.")
+        return
+
+    if event.transition_index[0] < config.GRD_NOMINAL_STATE[0]:
+        logger.info("IFO not fully locked, plugin will not run.")
+        return
+
+    plotutils.set_rcparams()
+    mod_window = [GLITCH_SEARCH_WINDOW[0], GLITCH_SEARCH_WINDOW[1]]
+    segment = Segment(mod_window).shift(event.gps)
+
+    buf = data.fetch(GLITCH_CHANNEL, segment)[0]
+    thresh_crossing = segment[1]
+    srate = buf.sample_rate
+    t = np.arange(segment[0], segment[1], 1 / srate)
+    highpass = signal.butter(4, 200, btype='highpass', output='sos', fs=srate)
+    hp_data = signal.sosfilt(highpass, buf.data)
+
+    if event.refined_gps:
+        lockloss_time = event.refined_gps
+    else:
+        lockloss_time = event.gps
+
+    thresh_ref = hp_data[np.where(t < lockloss_time - LOW_TIME)]
+    glitches = np.where((thresh_ref <= -THRESH) | (thresh_ref >= THRESH))[0]
+    # discard first 100ms of data to avoid filtering edge effects
+    glitches = glitches[glitches > 0.1 * srate]
+
+    if not any(glitches):
+        logger.info("No glitches found in {}".format(GLITCH_CHANNEL[0]))
+
+    else:
+        glitch_time = t[glitches[0]]
+        logger.info("Threshold crossed at time: {}".format(glitch_time))
+        low_ref = hp_data[np.where((t >= glitch_time) & (t < lockloss_time))]
+
+        count = 0
+        low_list = []
+        for value in low_ref:
+            if -LOW_THRESH < value < LOW_THRESH:
+                count += 1
+            else:
+                # gone outside of LOW_THRESH threshold, add count to list and reset.
+                low_list.append(count)
+                count = 0
+        low_list.append(count)
+
+        thresh_crossing = min(glitch_time, thresh_crossing)
+        low_max_time = max(low_list) / srate
+        # Checking that the channel remained within LOW_THRESH (1e5) for at least LOW_TIME (60ms)
+        logger.info("Channel remained for {}ms below threshold.".format(int(1000 * low_max_time)))
+        if (low_max_time >= LOW_TIME):
+            event.add_tag('ETM_GLITCH')
+        else:
+            logger.info('Channel did not remain within threshold, no ETM glitch found.')
+
+    # Make plots
+    fig, ax = plt.subplots(1, figsize=(22, 16))
+
+    ax.plot(
+        t - event.gps,
+        buf.data,
+        label=buf.channel,
+        alpha=0.8,
+        lw=2,
+    )
+
+    ax.grid()
+    ax.set_xlabel('Time [s] since lock loss at {}'.format(event.gps), labelpad=10)
+    ax.set_ylabel('Counts')
+    ax.legend(loc='best')
+    ax.set_title('Glitch check', y=1.04)
+    ax.set_xlim(segment[0] - event.gps, segment[1] - event.gps)
+    ax.set_ylim(-3.9 * (10 ** 5), 3.9 * (10 ** 5))
+    if thresh_crossing != segment[1]:
+        plotutils.set_thresh_crossing(ax, thresh_crossing, event.gps, segment)
+
+    fig.tight_layout()
+    fig.savefig(event.path('ETM_GLITCH.png'))
+
+    # Make High Passed data plot
+    fig1, ax1 = plt.subplots(1, figsize=(22, 16))
+
+    ax1.plot(
+        t - event.gps,
+        hp_data,
+        label='200Hz HP of {}'.format(buf.channel),
+        alpha=0.8,
+        lw=2,
+    )
+    ax1.axhline(
+        -THRESH,
+        linestyle='--',
+        color='black',
+        label='Glitch threshold',
+        lw=5,
+    )
+    ax1.axhline(
+        THRESH,
+        linestyle='--',
+        color='black',
+        lw=5,
+    )
+    ax1.grid()
+    ax1.set_xlabel('Time [s] since lock loss at {}'.format(event.gps), labelpad=10)
+    ax1.set_ylabel('Counts')
+    ax1.legend(loc='best')
+    ax1.set_title('Glitch check, 200Hz High Passed', y=1.04)
+    ax1.set_xlim(segment[0] - event.gps, segment[1] - event.gps)
+    ax1.set_ylim(1.9 * -THRESH, 1.9 * THRESH)
+    if thresh_crossing != segment[1]:
+        plotutils.set_thresh_crossing(ax1, thresh_crossing, event.gps, segment)
+
+    fig1.tight_layout()
+    fig1.savefig(event.path('ETM_GLITCH_HP.png'))

locklost/plugins/fss_oscillation.py

+import numpy as np
+import matplotlib.pyplot as plt
+
+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+from .. import plotutils
+
+
+FSS_SEARCH_WINDOW = [-5, 5]
+FSS_CHANNELS = [
+    '{}:PSL-FSS_FAST_MON_OUT_DQ'.format(config.IFO)
+]
+FSS_THRESH = 3
+
+
+##############################################
+
+
+def check_fss(event):
+    """Checks for FSS oscillations.
+
+    Checks FSS PD for counts below threshold and
+    creates a tag/plot if below said threshold.
+
+    """
+    plotutils.set_rcparams()
+
+    mod_window = [FSS_SEARCH_WINDOW[0], FSS_SEARCH_WINDOW[1]]
+    segment = Segment(mod_window).shift(int(event.gps))
+    buf = data.fetch(FSS_CHANNELS, segment)[0]
+
+    thresh_crossing = segment[1]
+    srate = buf.sample_rate
+    t = np.arange(segment[0], segment[1], 1/srate)
+    thresh_ref = buf.data[np.where(t-event.gps <= -1)]
+    thresh_above = np.mean(thresh_ref)+FSS_THRESH
+    thresh_below = np.mean(thresh_ref)-FSS_THRESH
+    glitches = np.where((thresh_ref <= thresh_below) | (thresh_ref >= thresh_above))[0]
+    if any(glitches):
+        glitch_time = t[glitches[0]]
+        thresh_crossing = min(glitch_time, thresh_crossing)
+        event.add_tag('FSS_OSCILLATION')
+    else:
+        logger.info('no fss oscillations')
+
+    fig, ax = plt.subplots(1, figsize=(22, 16))
+    t = np.arange(segment[0], segment[1], 1/srate)
+    ax.plot(
+        t-event.gps,
+        buf.data,
+        label=buf.channel,
+        alpha=0.8,
+        lw=2,
+    )
+    ax.axhline(
+        thresh_below,
+        linestyle='--',
+        color='black',
+        label='FSS oscillation threshold',
+        lw=5,
+    )
+    ax.axhline(
+        thresh_above,
+        linestyle='--',
+        color='black',
+        lw=5,
+    )
+    ax.grid()
+    ax.set_xlabel('Time [s] since lock loss at {}'.format(event.gps), labelpad=10)
+    ax.set_ylabel('Voltage [V]')
+    ax.legend(loc='best')
+    ax.set_title('FSS stability check', y=1.04)
+    ax.set_xlim(segment[0]-event.gps, segment[1]-event.gps)
+    if thresh_crossing != segment[1]:
+        plotutils.set_thresh_crossing(ax, thresh_crossing, event.gps, segment)
+
+    fig.tight_layout()
+
+    fig.savefig(event.path('fss.png'))

locklost/plugins/glitch.py

 import os
 import glob
-import logging
 import itertools
 from collections import defaultdict
+
+import h5py
 import numpy as np
 from scipy.interpolate import griddata
-
 import matplotlib
 from matplotlib import cm
 from matplotlib import pyplot as plt
@@ -15,18 +15,18 @@ from mpl_toolkits.axes_grid1 import make_axes_locatable
 
 from gwpy.segments import Segment, SegmentList
 
+from .. import logger
 from .. import config
 
-### specific trigger ingestion imports
-import h5py
 
 __author__ = "Patrick Godwin (patrick.godwin@ligo.org)"
 __description__ = "a plugin to analyze glitches around lockloss times"
 
+
 ##################################################
 
-### NOTE: embed viridis colormap since it isn't available for
-###       matplotlib prior to 1.4.x
+# NOTE: embed viridis colormap since it isn't available for
+#       matplotlib prior to 1.4.x
 
 VIRIDIS_DATA = [[0.267004, 0.004874, 0.329415],
                 [0.268510, 0.009605, 0.335427],
@@ -288,9 +288,10 @@ VIRIDIS = ListedColormap(VIRIDIS_DATA, name='viridis')
 
 ##################################################
 
-### NOTE: this has been taken and modified from iDQ, and will be
-###       removed when a standard function for grabbing gstlal triggers
-###       are incorporated into gwpy
+
+# NOTE: this has been taken and modified from iDQ, and will be
+#       removed when a standard function for grabbing gstlal triggers
+#       are incorporated into gwpy
 def retrieve_triggers(event, trigger_path, channels=None):
     """
     workhorse data discovery method for gstlal hdf5 files
@@ -302,7 +303,7 @@ def retrieve_triggers(event, trigger_path, channels=None):
     analysis_seg = Segment(*config.PLOT_WINDOWS['WIDE']).shift(gps)
     analysis_segs = SegmentList([analysis_seg])
 
-    ### find triggers using directory patterns
+    # find triggers using directory patterns
     basename = '{}-GSTLAL_IDQ_FEATURES'.format(config.IFO[0])
     digits_start = str(analysis_seg[0])[:5]
     digits_end = str(analysis_seg[1])[:5]
@@ -314,7 +315,7 @@ def retrieve_triggers(event, trigger_path, channels=None):
     trigger_files = glob.iglob(os.path.join(trigger_path, glob_pattern))
     cache = [CacheEntry.from_T050017(file_) for file_ in trigger_files]
 
-    ### consider more directories if first 5 digits of gps do not match
+    # consider more directories if first 5 digits of gps do not match
     if digits_start != digits_end:
         glob_pattern = os.path.join(
             basename,
@@ -324,25 +325,26 @@ def retrieve_triggers(event, trigger_path, channels=None):
         trigger_files = glob.iglob(os.path.join(trigger_path, glob_pattern))
         cache.extend([CacheEntry.from_T050017(file_) for file_ in trigger_files])
 
-    ### data structure and dtype for query results
+    # data structure and dtype for query results
     data = defaultdict(list)
     sample_rate = None
     columns = ['time', 'snr']
     dtype = [(col, '<f8') for col in columns]
 
-    for entry in cache: ### iterate over hdf5 files
+    # iterate over hdf5 files
+    for entry in cache:
 
-        ### determine which segments are relevant for this hdf5 file
+        # determine which segments are relevant for this hdf5 file
         relevant_segs = SegmentList([Segment(*entry.segment)]) & analysis_segs
         if not relevant_segs:
             continue
 
         with h5py.File(entry.path, 'r') as file_obj:
 
-            ### determine stride + sample rate of datasets
+            # determine stride + sample rate of datasets
             sample_rate = file_obj.attrs.get('sample_rate')
 
-            ### query only channels in file
+            # query only channels in file
             file_channels = set(file_obj.keys())
             if channels is not None:
                 channels2query = file_channels & set(channels)
@@ -353,7 +355,7 @@ def retrieve_triggers(event, trigger_path, channels=None):
                 datasets = set(file_obj[channel].keys())
                 dset_segs = [dset2segment(dset) for dset in datasets]
 
-                ### filter datasets with segments
+                # filter datasets with segments
                 relevant_datasets = [(dset, seg) for dset, seg in zip(datasets, dset_segs)
                                      if relevant_segs.intersects_segment(seg)]
                 dset_span = np.sum([seg[1]-seg[0] for _, seg in relevant_datasets])
@@ -363,14 +365,14 @@ def retrieve_triggers(event, trigger_path, channels=None):
 
                 key = os.path.join(channel, relevant_datasets[0][0])
 
-                ### preallocate space and initialize all values to nan
+                # preallocate space and initialize all values to nan
                 rows = np.empty((int(dset_span * sample_rate),), dtype=dtype)
                 if rows.size == 1:
                     rows[:] = tuple(np.nan for col in columns)
                 else:
                     rows[:] = np.nan
 
-                ### populate allocated rows with datasets
+                # populate allocated rows with datasets
                 idx_start = 0
                 for dataset, seg in relevant_datasets:
                     livetime = seg[1] - seg[0]
@@ -382,7 +384,7 @@ def retrieve_triggers(event, trigger_path, channels=None):
 
                 data[channel].append(rows)
 
-    ### stack datasets vertically
+    # stack datasets vertically
     for channel, datasets in data.items():
         data[channel] = np.concatenate(datasets, axis=0)
 
@@ -405,7 +407,7 @@ def plot_snr_eventmap(event, triggers, sample_rate, zoom, normalize=False):
     """Produces event plot for several data channels; lines are colored by SNR.
 
     """
-    ### get relevant info from event, config settings
+    # get relevant info from event, config settings
     gps = event.gps
 
     window = config.GLITCH_PLOT_WINDOWS[zoom]
@@ -418,7 +420,7 @@ def plot_snr_eventmap(event, triggers, sample_rate, zoom, normalize=False):
         glitch_channels = ['{}:{}'.format(config.IFO, chan) for chan in glitch_channels]
         channels = set(glitch_channels) & set(triggers.keys())
 
-        ### filter triggers based on plot window
+        # filter triggers based on plot window
         filt_triggers = dict(triggers)
         for channel in channels:
             window_condition = np.logical_and(
@@ -428,52 +430,52 @@ def plot_snr_eventmap(event, triggers, sample_rate, zoom, normalize=False):
             filt_triggers[channel] = filt_triggers[channel][np.where(window_condition)]
             filt_triggers[channel]['time'] -= gps
 
-        ### find out which channels have triggers to plot
+        # find out which channels have triggers to plot
         channels &= set([ch for ch in filt_triggers.keys() if len(filt_triggers[ch]) > 0])
 
         if len(channels) > 1:
-            logging.info("generating {} eventmap for {} subsystem".format(
+            logger.info("generating {} eventmap for {} subsystem".format(
                 zoom,
                 glitch_subsystem,
             ))
 
-            ### sort channels by name
+            # sort channels by name
             channels = sorted(list(channels))
 
-            ### define figure, axes
-            fig = plt.figure(dpi = 300)
+            # define figure, axes
+            fig = plt.figure(dpi=300)
             axes = fig.add_subplot(111)
 
-            ### set a colormap based on matplotlib version available
+            # set a colormap based on matplotlib version available
             try:
                 cmap = cm.viridis
             except AttributeError:
                 cmap = VIRIDIS
 
-            ### set SNR bounds
+            # set SNR bounds
             channel_snr_max = {ch: max(filt_triggers[ch]['snr']) for ch in channels}
             if normalize:
                 snr_min = 10**-5
                 snr_max = 1
             else:
-                ### NOTE: if max SNR over all channels is < 1, set range: (max(SNR), 1)
-                ###       else, set range: (1, max(SNR))
+                # NOTE: if max SNR over all channels is < 1, set range: (max(SNR), 1)
+                #       else, set range: (1, max(SNR))
                 snr_min = min(1, max(channel_snr_max.values()))
                 snr_max = min(10**5, max(max(channel_snr_max.values()), 1))
 
-            ### set default values in case of missing data
+            # set default values in case of missing data
             step_size = 1. / sample_rate
             default_times = np.arange(window[0], window[1] + step_size, step_size)
             default_snrs = np.ones(len(default_times)) * snr_min
 
-            ### define colorbar and map colors to correct scaling
+            # define colorbar and map colors to correct scaling
             snr_norm = matplotlib.colors.LogNorm(vmin=snr_min, vmax=snr_max, clip=True)
-            mapper = cm.ScalarMappable(norm = snr_norm, cmap = cmap)
+            # mapper = cm.ScalarMappable(norm=snr_norm, cmap=cmap)
 
-            ### define channel and time indices
+            # define channel and time indices
             time_idx, channel_idx = np.meshgrid(default_times, np.arange(len(channels) + 1))
 
-            ### generate grid points
+            # generate grid points
             time_pts = np.tile(default_times, len(channels))
             ch_pts = np.repeat(np.arange(len(channels)), len(default_times))
             snr_pts = np.array([])
@@ -487,21 +489,21 @@ def plot_snr_eventmap(event, triggers, sample_rate, zoom, normalize=False):
                     snrs[trgtime_idx] = filt_triggers[channel]['snr']
                 snr_pts = np.append(snr_pts, snrs)
 
-            ### generate SNR indices from interpolated grid, SNR data
+            # generate SNR indices from interpolated grid, SNR data
             grid_pts = (time_pts, ch_pts)
             interp_pts = (time_idx[:-1, :-1], channel_idx[:-1, :-1])
             snr_idx = griddata(grid_pts, snr_pts, interp_pts, method='linear')
 
-            ### plot heatmap
-            axes.pcolormesh(time_idx, channel_idx, snr_idx, cmap = cmap, norm = snr_norm)
+            # plot heatmap
+            axes.pcolormesh(time_idx, channel_idx, snr_idx, cmap=cmap, norm=snr_norm)
 
-            ### attach y axis to plot
+            # attach y axis to plot
             axes.set_yticks(np.arange(len(channels)) + 0.5)
             axes.set_yticklabels(list(channels))
             axes.set_ylabel(r"Data Channels")
             axes.set_ylim(0, len(channels))
 
-            ### attach x axis to plot
+            # attach x axis to plot
             axes.set_xlabel(r"Time [s] from lock loss at {:f}".format(gps))
             axes.set_xlim((window[0], window[1]))
             axes.grid(which='major', axis='x', color='lightgrey')
@@ -509,26 +511,26 @@ def plot_snr_eventmap(event, triggers, sample_rate, zoom, normalize=False):
             # add vertical line to mark lock loss time
             axes.axvline(
                 0,
-                color = 'black',
-                linestyle = '--',
-                lw = 1
+                color='black',
+                linestyle='--',
+                lw=1,
             )
 
-            ### attach colorbar to plot
+            # attach colorbar to plot
             divider = make_axes_locatable(axes)
-            cax = divider.append_axes( "right", size="5%", pad=0.1)
+            cax = divider.append_axes("right", size="5%", pad=0.1)
             cbl = matplotlib.colorbar.ColorbarBase(
                 cax,
-                cmap = cmap,
-                norm = snr_norm,
-                orientation="vertical"
+                cmap=cmap,
+                norm=snr_norm,
+                orientation="vertical",
             )
             if normalize:
                 cbl.set_label(r"Normalized SNR (by channel)")
             else:
                 cbl.set_label(r"SNR")
 
-            ### misc plot formatting
+            # misc plot formatting
             axes.set_title(r"Eventmap for {} channels".format(glitch_subsystem))
             plt.rc('font', size=10)
             plt.rc('axes', titlesize=10, labelsize=10)
@@ -537,13 +539,13 @@ def plot_snr_eventmap(event, triggers, sample_rate, zoom, normalize=False):
             plt.rc('legend', fontsize=10)
             plt.tight_layout()
 
-            ### write plot to disk
+            # write plot to disk
             outfile = 'snr_eventmap_{}_{}.png'.format(glitch_subsystem, zoom)
-            outpath = os.path.join(event.path, outfile)
-            logging.debug(outpath)
-            fig.savefig(outpath, dpi = 300)
+            outpath = event.path(outfile)
+            logger.debug(outpath)
+            fig.savefig(outpath, dpi=300)
         else:
-            logging.info("No channels available for {} subsystem, skipping eventmap".format(
+            logger.info("No channels available for {} subsystem, skipping eventmap".format(
                 glitch_subsystem,
             ))
 
@@ -558,7 +560,7 @@ def analyze_glitches(event):
 
     all_channels = list(itertools.chain.from_iterable(config.GLITCH_CHANNELS.values()))
     all_channels = ['{}:{}'.format(config.IFO, chan) for chan in all_channels]
-    logging.info("finding triggers surrounding event")
+    logger.info("finding triggers surrounding event")
     triggers, sample_rate = retrieve_triggers(
         event,
         trigger_path,
@@ -566,9 +568,10 @@ def analyze_glitches(event):
     )
 
     if triggers.keys():
-        logging.info("generating eventmaps")
+        logger.info("generating eventmaps")
         for zoom in config.PLOT_WINDOWS.keys():
             plot_snr_eventmap(event, triggers, sample_rate, zoom)
 
-    else: ### no channels to analyze
-        logging.warning("No triggers available for this event, skipping analysis")
+    # no channels to analyze
+    else:
+        logger.warning("No triggers available for this event, skipping analysis")

locklost/plugins/guardinfo.py

-import logging
+import os
 import datetime
 import subprocess
 
+import requests
 import gpstime
 
+from .. import logger
 from .. import config
 
 
@@ -28,9 +30,9 @@ def retrieve_guardlog(event):
         '--lines', '1000000',
         GUARDLOG_NODES,
     ]
-    logging.info("retrieving guardian log...")
-    logging.debug(' '.join(cmd))
-    with open(event.gen_path('guardlog.txt'), 'w') as f:
+    logger.info("retrieving guardian log...")
+    logger.debug(' '.join(cmd))
+    with open(event.path('guardlog.txt'), 'w') as f:
         subprocess.call(
             cmd,
             stdout=f,
@@ -49,11 +51,26 @@ def previous_state_name(event):
     sys.load()
     state_index = event.transition_index[0]
     name = sys.index(state_index)
-    logging.info("previous guardian state name: {}".format(name))
-    with open(event.gen_path('previous_state_name'), 'w') as f:
+    logger.info("previous guardian state name: {}".format(name))
+    with open(event.path('previous_state_name'), 'w') as f:
         f.write(name+'\n')
 
 
+def fetch_cds_guardinfo(event):
+    """Fetch guardian info from CDS.
+
+    """
+    URL_BASE = os.path.join(config.CDS_EVENT_ROOT, event.epath)
+
+    r = requests.get(URL_BASE+'guardlog.txt')
+    with open(event.path('guardlog.txt'), 'w') as f:
+        f.write(r.text)
+
+    r = requests.get(URL_BASE+'previous_state_name')
+    with open(event.path('previous_state_name'), 'w') as f:
+        f.write(r.text)
+
+
 def guardian_info(event):
     """Retrieve all guardian info.
 

locklost/plugins/ham6_power.py

+import numpy as np
+import matplotlib.pyplot as plt
+
+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+from .. import plotutils
+
+
+#################################################
+
+
+def power_in_ham6(event):
+    '''Calculates the power under the curve for the PEM-CS_ADC_5_19_2K_OUT_DQ
+    channel and compares it to the power that gets through the fast shutter'''
+
+    plotutils.set_rcparams()
+
+    gps = event.gps
+    ifo = config.IFO
+    window = [-3, 3]
+
+    if ifo == 'H1':
+        if gps < 1415034018:
+            logger.info('The HAM6 power monitor was not fully installed for '
+                        'locklosses occurring before November 07, 2024 '
+                        '17:00UTC (See LHO81080). Plugin not running.')
+            return
+        elif event.transition_index[0] < config.GRD_NOMINAL_STATE[0]:
+            logger.info('IFO was not in low noise. Plugin not running.')
+            return
+    elif ifo == 'L1' and gps < 1410812958:
+        logger.info('The HAM6 power monitor was not installed for '
+                    'locklosses occurring before Sep 19, 2024 '
+                    '15:29 CT. Plugin not running.')
+        return
+
+    if ifo == 'H1':
+        channels = [
+            f'{ifo}:PEM-CS_ADC_5_19_2K_OUT_DQ',
+            f'{ifo}:ASC-AS_A_DC_NSUM_OUT_DQ',
+            f'{ifo}:OMC-DCPD_SUM_OUT_DQ',
+            f'{ifo}:ISI-HAM6_GS13INF_V3_IN1_DQ'
+        ]
+
+        # Get the data
+        segment = Segment(window).shift(gps)
+        bufs = data.fetch(channels, segment)
+
+        # Calibration
+        calPEM = 0.177  # [W/ct]
+        calASA = 1.15e-5  # From data before GPS=1415043099 lockloss
+        asa_sat_thresh = 130000 * calASA  # ~1.5W; raw cts before calib
+        pmon_sat_thresh = 32000 * calPEM  # ~5.66kW; rails at ~32k (1V)
+
+    elif ifo == 'L1':
+        channels = [
+            f'{ifo}:PEM-CS_ADC_4_11_OUT_DQ',
+            f'{ifo}:ASC-AS_A_DC_SUM_OUT_DQ',
+            f'{ifo}:OMC-DCPD_SUM_OUT_DQ',
+            f'{ifo}:ISI-HAM6_GS13INF_V3_IN1_DQ',
+            f'{ifo}:PEM-CS_ADC_4_11_GAIN'
+        ]
+
+        # Get the data
+        segment = Segment(window).shift(gps)
+        bufs = data.fetch(channels, segment)
+
+        # Calibration
+        calPEM = 1  # calibrated in front end [W]
+        calASA = 1.562e-5  # Calibrated to same power as PEM during lockloss
+        asa_sat_thresh = (2**17)*calASA  # ~1.5W; raw cts before calib
+        pmon_sat_thresh = (2**15)*bufs[4].data[0]*calPEM  # ~5.66kW; rails at ~32k (1V)
+
+    # Filter through each channel and get data times
+    # PEM-CS_ADC_5_19_2K_OUT_DQ
+    pmon = bufs[0].data*calPEM
+    t_pmon = np.arange(0, len(pmon))/bufs[0].sample_rate + window[0]
+    # ASC-AS_A_DC_NSUM_OUT_DQ
+    asa = bufs[1].data
+    pasa = asa*calASA
+    t_asa = np.arange(0, len(asa))/bufs[1].sample_rate + window[0]
+    # OMC-DCPD_SUM_OUT_DQ
+    dcpd = bufs[2].data
+    t_dcpd = np.arange(0, len(dcpd))/bufs[2].sample_rate + window[0]
+    # ISI-HAM6_GS13INF_V3_IN1_DQ
+    gs13 = bufs[3].data
+    t_gs13 = np.arange(0, len(gs13))/bufs[3].sample_rate + window[0]
+
+    # Find fast shutter trigger time
+    if ifo == 'H1':
+        trigger = (np.abs(gs13) > 100).argmax()
+    elif ifo == 'L1':
+        trigger = (np.abs(gs13) > 500).argmax()
+    t_trigger = t_gs13[trigger]
+
+    # Integrate power monitor over t_trigger+[-0.1, +0.2]
+    pmon_integ_range = range(
+        (t_pmon >= t_trigger-0.1).argmax(),
+        (t_pmon > t_trigger+0.2).argmax()
+    )
+    e_ham6 = sum(pmon[pmon_integ_range])*(t_pmon[1]-t_pmon[0])
+
+    # Assume that the power while the shutter was closed is negligible
+    # Only integrate when the shutter is open
+    # If pmon doesn't saturate, shutter open/close status is approximated by:
+    #   abs(p(ham6)/p(AS_A_DC_NSUM)) < pmon_sat_thresh/asa_sat_thresh = 3.8k
+    #
+    # This is because:
+    #   When the shutter is closed, the ratio would be:
+    #       ~1/trans_mirror ~ 1.4E4 > 3.8k
+    #       (or larger if AS_A saturates but power monitor doesn't)
+    #   When the shutter is open, the ratio would be
+    #       ~1 < 3.8k
+    #       (or larger if AS_A saturates but power monitor doesn't)
+    #   pmon saturates earlier than AS_A when shutter is closed, because
+    #    pmon_sat_thresh is 5.7kW and asa_sat_thresh/trans_mirror~20kW
+    #
+    # Therefore, unless pmon saturates,
+    #  abs(p(ham6)/p(AS_A_DC_NSUM)) < pmon_sat_thresh/asa_sat_thresh = 3.8k
+    #  is a good criteria to tell the shutter open state
+
+    # Get ratio between pmon and pasa - add 1e-20 to avoid /0
+    if ifo == 'H1':
+        pmon_pasa_ratio = np.divide(np.abs(pmon), np.abs(pasa) + 1E-20)
+    elif ifo == 'L1':
+        pmon_pasa_ratio = 1  # ASA already calibrated to PEM channel
+    ratio_thresh = pmon_sat_thresh/asa_sat_thresh
+    # Getting power downstream of fast shutter
+    p_after_FS = np.multiply(pmon, np.logical_and(pmon_pasa_ratio < ratio_thresh, pmon > 0.01))
+    # Integrate p_aft_fs over the same integration range for pmon
+    e_after_FS = sum(p_after_FS[pmon_integ_range])*(t_pmon[1]-t_pmon[0])
+    # Check if pmon is close to saturation
+    pmon_sat_check = np.max(pmon) > 0.9*pmon_sat_thresh
+
+    # Plot figures
+    logger.info('Creating HAM6 power plot')
+    # Update default font sizes
+    plt.rcParams['font.size'] = 20
+    plt.rcParams['axes.titlesize'] = 35
+    plt.rcParams['axes.labelsize'] = 20
+    plt.rcParams['xtick.labelsize'] = 20
+    plt.rcParams['ytick.labelsize'] = 20
+    plt.rcParams['legend.fontsize'] = 23
+
+    fig, (ax0, ax1, ax2) = plt.subplots(3, sharex=True, figsize=(27, 16), dpi=100)
+
+    # Plot PEM pmon, AS_A, and power after the fast shutter
+    p_peak = np.nanmax(pmon)  # peak power
+    ax0.semilogy(
+        t_pmon,
+        pmon,
+        label=f'Lockloss power monitor (Energy: {e_ham6:.1f}J, Peak power: {p_peak:.1f}W)',
+        linewidth=5.5
+    )
+    ax0.semilogy(
+        t_asa,
+        pasa,
+        label='ASC-AS_A_DC_NSUM',
+        linewidth=5.5
+    )
+    if ifo == 'H1':
+        ax0.semilogy(
+            t_pmon,
+            p_after_FS,
+            label=f'Power after fast shutter (Projection, Energy: {e_after_FS:.1f}J)',
+            linewidth=2.5,
+            color='cyan'
+        )
+    ax0.axhline(
+        asa_sat_thresh,
+        label='AS_A Saturation Threshold',
+        color='k',
+        linestyle='--'
+    )
+    if trigger != 0:
+        ax0.set_xlim(t_trigger-0.15, t_trigger+0.18)
+    ax0.set_ylim(1E-4, p_peak*2)
+    ax0.set_ylabel('Power [W]')
+    # Display warning if pmon saturated
+    if pmon_sat_check:
+        logger.info('Power monitor might have railed!')
+        ax0.text(
+            t_trigger+0.1,
+            10,
+            'Power monitor might have railed!!',
+            color='red',
+            size=22
+        )
+
+    # Plot DCPDs
+    ax1.plot(
+        t_dcpd,
+        dcpd,
+        label='OMC-DCPD_SUM',
+        lw=4
+    )
+    ax1.set_ylabel('Current [mA]')
+    if ifo == 'H1':
+        ax1.set_ylim(35, 45)
+    elif ifo == 'L1':
+        ax1.set_ylim(15, 55)
+
+    # Plot GS13 for HAM6 that shows time of fast shutter close
+    ax2.plot(
+        t_gs13,
+        gs13,
+        label='HAM6_GS13INF_V3_IN2',
+        lw=4
+    )
+    ax2.set_ylabel('counts')
+    ax2.set_xlabel(f'Time [s] since Lockloss at {str(gps)}')
+
+    for ax in [ax0, ax1, ax2]:
+        ax.grid(True)
+        ax.legend(loc='lower left')
+
+    ax0.set_title('Power through HAM6')
+    fig.tight_layout(pad=0.05)
+
+    # Save plot to lockloss directory
+    outfile_plot = 'HAM6_power.png'
+    outpath_plot = event.path(outfile_plot)
+    fig.savefig(outpath_plot, bbox_inches='tight')
+    fig.clf()

locklost/plugins/history.py

 import os
-import logging
+
 import numpy as np
 
 from gwpy.segments import Segment
 
+from .. import logger
 from .. import config
 from .. import data
 
-##################################################
 
 INITIAL_WINDOW = [-60, 0]
 
+
+##################################################
+
+
 def find_previous_state(event):
     """Collect info about previous guardian state
 
@@ -21,24 +25,22 @@ def find_previous_state(event):
     """
     channels = [config.GRD_STATE_N_CHANNEL]
 
-    # get the lock loss transition itself
-    previous_index, lockloss_index = event.transition_index
-
     # find the transition time
     segment = Segment(0, 1).shift(event.id)
     gbuf = data.fetch(channels, segment)[0]
-    lli = np.where(gbuf.data == lockloss_index)[0]
+    lli = np.where(gbuf.data == event.transition_index[1])[0]
     assert len(lli) > 0, "Lock loss not found at this time!"
     state_end_gps = gbuf.tarray[lli[0]]
     # note the transition time for old events
-    state_end_file = event.gen_path('guard_state_end_gps')
+    state_end_file = event.path('guard_state_end_gps')
     if not os.path.exists(state_end_file):
         with open(state_end_file, 'w') as f:
             f.write('{:f}\n'.format(state_end_gps))
-    assert state_end_gps == event.transition_gps, "State end time does not match transition_gps ({} != {}).".format(state_end_gps, event.transition_gps)
 
     # find start of previous state
     lockloss_found = False
+    check_3_101_2 = 0
+    check_3_2 = 0
     state_start_gps = None
     power = 1
     window = [INITIAL_WINDOW[0], 1]
@@ -51,20 +53,94 @@ def find_previous_state(event):
 
         # check the transitions
         for transition in reversed(transitions):
+            transt = transition[0]
+            transi = tuple(map(int, transition[1:]))
             if lockloss_found:
-                assert int(transition[2]) == previous_index, "Transition history does not match lock loss transtion ({} != {}).".format(transition[2], previous_index)
-                state_start_gps = transition[0]
+                if config.IFO == 'H1' and transi[0] >= 600:
+                    logger.info(
+                        "Previous state was still in NLN, continue searching "
+                        "for transition from state less than 600."
+                    )
+                    continue
+                previous_index = event.transition_index[0]
+                # Ignore matching up transi[1] with event.transition_index[0] if
+                # state at lockloss was at or above 600
+                if not (config.IFO == 'H1' and previous_index >= 600):
+                    assert transi[1] == previous_index, \
+                        "Transition history does not match lock loss " \
+                        f"transition ({transi[1]} != {previous_index})"
+                state_start_gps = transt
                 break
-            elif tuple(transition[1:]) == event.transition_index:
-                logging.info("lockloss found: {}".format(transition[0]))
+
+            # For H1, a X->3->101->2 transition is a common pattern
+            # that shows up as 101->2 but we actually want to record
+            # them as X->3.  The following logic checks to see if
+            # we're in one of these situations and updates the
+            # transition_index information accordingly.
+            #
+            # and event.transition_index == (101, 2)
+            if config.IFO == 'H1':
+                if transi == (101, 2):
+                    # could be this case, so mark as candidate and
+                    # continue
+                    check_3_101_2 = 1
+                    continue
+                elif check_3_101_2 == 1:
+                    if transi == (3, 101):
+                        # yup, this is it, note and continue
+                        check_3_101_2 = 2
+                        continue
+                    else:
+                        # nope, this is a regular 101->2 transtion, so
+                        # note state 101 start time and break
+                        lockloss_found = True
+                        state_start_gps = transt
+                        break
+                elif check_3_101_2 == 2:
+                    logger.info(
+                        f'Updating H1 lockloss for X->3->101->2 '
+                        f'transition: {transi}'
+                    )
+                    event.add_tag("FAST_DRMI")
+                    # update the transition_index information on disk
+                    # and clear cache so it's reloaded next access
+                    with open(event.path('transition_index'), 'w') as f:
+                        f.write('{} {}\n'.format(*transi))
+                    event._transition_index = None
+                    # don't continue so that we hit the lockloss_found
+                    # check below
+
+                # If we don't have a X->3->101->2 LL, check if we maybe have
+                # a X->3->2 LL
+                if transi == (3, 2):
+                    # Mark as candidate for this type of LL
+                    check_3_2 = 1
+                    continue
+                elif check_3_2 == 1:
+                    logger.info(
+                        f'Updating H1 lockloss for X->3->2 '
+                        f'transition: {transi}'
+                    )
+                    event.add_tag("FAST_DRMI")
+                    # update the transition_index information on disk
+                    # and clear cache so it's reloaded next access
+                    with open(event.path('transition_index'), 'w') as f:
+                        f.write('{} {}\n'.format(*transi))
+                    event._transition_index = None
+                    # don't continue so that we hit the lockloss_found
+
+            if transi == event.transition_index:
+                logger.info(f'Lockloss found: {transi}')
                 lockloss_found = True
-        assert lockloss_found, "lock loss not found in first segment"
+
+        assert lockloss_found, "Lock loss not found in first segment"
 
         window = [edge * (2 ** power) + window[0] for edge in INITIAL_WINDOW]
         power += 1
 
     # write start of lock stretch to disk
+    previous_index, lockloss_index = event.transition_index
     previous_state = (previous_index, state_start_gps, state_end_gps, lockloss_index)
-    logging.info("previous guardian state: {}".format(previous_state))
-    with open(event.gen_path('previous_state'), 'w') as f:
+    logger.info("Previous guardian state: {}".format(previous_state))
+    with open(event.path('previous_state'), 'w') as f:
         f.write('{} {:f} {:f} {}\n'.format(*previous_state))

locklost/plugins/ifo_mode.py

+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+
+
+WINDOW = [-5, 0]
+OBSERVE_CHANNEL = ['{}:GRD-IFO_OK'.format(config.IFO)]
+IFO_MODE_CHANNEL = ['{}:ODC-OBSERVATORY_MODE'.format(config.IFO)]
+
+# The Observatory mode is set by operators/commissioners to indicate when the
+# IFO is in a non-Observing state. While GRD-IFO_OK is an absolute check that
+# we are in Observing, ODC-OBSERVATORY_MODE is not guaranteed to represent the
+# state of the Observatory.
+
+
+##############################################
+
+
+def check_ifo_mode(event):
+    """Checks if IFO Observatory mode is set to MAINTENANCE, CALIBRATION,
+    or COMMISSIONING modes and creates appropriate tag. """
+
+    mode_window = [WINDOW[0], WINDOW[1]]
+    segment = Segment(mode_window).shift(int(event.gps))
+    observe_channel = data.fetch(OBSERVE_CHANNEL, segment)[0]
+
+    if bool(observe_channel.data[0]):
+        event.add_tag('OBSERVE')
+        return
+
+    mode_channel = data.fetch(IFO_MODE_CHANNEL, segment)[0]
+
+    # commissioners are noise hunting, experimenting with controls, creating alignment scripts, etc.
+    if any(mode_channel.data == 40):
+        event.add_tag('COMMISSIONING')
+    # all activities related to calibration, including calibration injections
+    elif any(mode_channel.data == 51):
+        event.add_tag('CALIBRATION')
+    # for Tuesday maintenance as well as hardware/software failures that must be fixed
+    elif any(mode_channel.data == 53) or any(mode_channel.data == 52):
+        event.add_tag('MAINTENANCE')
+    else:
+        logger.info('IFO mode was not in commissioning, calibration, or maintenance.')

locklost/plugins/initial_alignment.py

+import numpy as np
+
+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+
+
+##############################################
+
+
+def initial_alignment_check(event):
+    """Checks to see if an initial alignment is needed based off the output of the ITM green cameras"""
+
+    if config.IFO == 'L1':
+        logger.info("followup is not configured or not applicable to LLO.")
+        return
+
+    if event.transition_index[0] > config.INIT_GRD_STATE[0]:
+        logger.info('Guardian state is too high to check for initial alignment.')
+        return
+
+    mod_window = [config.INITIAL_ALIGNMENT_SEARCH_WINDOW[0], config.INITIAL_ALIGNMENT_SEARCH_WINDOW[1]]
+    segment = Segment(mod_window).shift(int(event.gps))
+
+    itm_channels = data.fetch(config.ITM_CHANNELS, segment)
+
+    dof1_wfs = data.fetch(config.ALS_WFS_DOF1, segment)
+    dof2_wfs = data.fetch(config.ALS_WFS_DOF2, segment)
+    dof3_wfs = data.fetch(config.ALS_WFS_DOF3, segment)
+
+    for i in dof1_wfs:
+        i = np.abs(i.data) * config.DOF_1_SCALE
+        i = np.array([i])
+
+    for q in dof2_wfs:
+        q = np.abs(q.data) * config.DOF_2_SCALE
+        q = np.array([q])
+
+    for j in dof3_wfs:
+        j = np.abs(j.data) * config.DOF_3_SCALE
+        j = np.array([j])
+
+    initial_alignment = False
+
+    wfs_arr = np.concatenate((i, q, j), axis=0)
+    wfs_max = np.amax(wfs_arr)
+
+    if wfs_max < config.WFS_THRESH:
+
+        for check_als in itm_channels:
+
+            chan_name = check_als.channel
+            check_als = check_als.data
+
+            signal = np.abs(check_als)
+            signal_max = np.amax(signal)
+
+            if signal_max >= config.INITIAL_ALIGNMENT_THRESH:
+                initial_alignment = True
+                logger.info('{} is above the threshold.'.format(chan_name))
+
+        if initial_alignment:
+            event.add_tag('INITIAL_ALIGNMENT')
+        else:
+            logger.info('An initial alignment is not needed.')
+    else:
+        logger.info('ALS WFS have not yet converged.')

locklost/plugins/iss.py

+import numpy as np
+import matplotlib.pyplot as plt
+
+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+from .. import plotutils
+
+
+FSS_SEARCH_WINDOW = [-60, 5]
+FSS_CHANNELS = [
+    '{}:PSL-ISS_AOM_DRIVER_MON_OUT_DQ'.format(config.IFO)
+]
+FSS_THRESH = 0.36
+
+
+##############################################
+
+
+def check_iss(event):
+    """Checks for ISS AOM.
+
+    Checks ISS AOM for counts below threshold and
+    creates a tag/plot if below said threshold.
+
+    """
+    plotutils.set_rcparams()
+
+    mod_window = [FSS_SEARCH_WINDOW[0], FSS_SEARCH_WINDOW[1]]
+    segment = Segment(mod_window).shift(int(event.gps))
+    buf = data.fetch(FSS_CHANNELS, segment)[0]
+
+    srate = buf.sample_rate
+    t = np.arange(segment[0], segment[1], 1/srate)
+    idxs = (t-event.gps) < -1
+    if config.IFO == 'L1':
+        if np.min(buf.data[idxs]) <= FSS_THRESH:
+            event.add_tag('ISS')
+        else:
+            logger.info('no ISS issue')
+    else:
+        logger.info('Tag not Configured for LHO')
+    fig, ax = plt.subplots(1, figsize=(22, 16))
+    t = np.arange(segment[0], segment[1], 1/srate)
+    ax.plot(
+        t-event.gps,
+        buf.data,
+        label=buf.channel,
+        alpha=0.8,
+        lw=2,
+    )
+    if config.IFO == 'L1':
+        ax.axhline(
+            FSS_THRESH,
+            linestyle='--',
+            color='black',
+            label='ISS Threshold',
+            lw=5,
+        )
+    ax.grid()
+    ax.set_xlabel('Time [s] since lock loss at {}'.format(event.gps), labelpad=10)
+    ax.set_ylabel('Voltage [V]')
+    ax.legend(loc='best')
+    ax.set_title('ISS AOM', y=1.04)
+    ax.set_xlim(segment[0]-event.gps, segment[1]-event.gps)
+
+    fig.tight_layout()
+
+    fig.savefig(event.path('iss.png'))

locklost/plugins/lpy.py

 import os
-import logging
 from collections import defaultdict
+
 import numpy as np
 import matplotlib.pyplot as plt
-from matplotlib.ticker import MaxNLocator
 
 from gwpy.segments import Segment
 
+from .. import logger
 from .. import config
 from .. import data
 from .. import plotutils
 
+
 #################################################
 
+
 def find_lpy(event):
     """Create length, pitch, and yaw plots
 
@@ -25,18 +27,17 @@ def find_lpy(event):
 
     # determine first suspension channel to saturate from saturation plugin
     infile_csv = 'saturations.csv'
-    inpath_csv = event.gen_path(infile_csv)
+    inpath_csv = event.path(infile_csv)
     sat_channel = ''
-    lpy_lim = 4*config.SATURATION_THRESHOLD
 
     if not os.path.exists(inpath_csv):
-        logging.info("LPY plot bypassed (no saturating suspensions).")
-        return
-
-    with open(inpath_csv, 'r') as f:
-        first_sat = f.readline()
-        if first_sat:
-            sat_channel, sat_time = first_sat.split(' ', 1)
+        logger.info('No saturating suspensions, plotting ETMX L3 LPY')
+        sat_channel = f'{config.IFO}:SUS-ETMX_L3_MASTER_OUT_UR_DQ'
+    else:
+        with open(inpath_csv, 'r') as f:
+            first_sat = f.readline()
+            if first_sat:
+                sat_channel, sat_time = first_sat.split(' ', 1)
 
     # generate the LPY mapping and channels to query from base channel
     lpy_map = channel2lpy_coeffs(sat_channel)
@@ -44,7 +45,7 @@ def find_lpy(event):
     channels = [get_sus_channel(base_channel, corner) for corner in lpy_map['corners']]
 
     for window_type, window in config.PLOT_WINDOWS.items():
-        logging.info('Making {} LPY plot for {}'.format(window_type, base_channel))
+        logger.info('Making {} LPY plot for {}'.format(window_type, base_channel))
 
         segment = Segment(window).shift(gps)
         bufs = data.fetch(channels, segment)
@@ -58,37 +59,43 @@ def find_lpy(event):
         for title in titles:
             for corner, coeff in lpy_map[title].items():
                 idx = channels.index(get_sus_channel(base_channel, corner))
-                lpy[title] += (bufs[idx].data * coeff)/lpy_lim
+                # If ETMX, make threshold < saturation value so we can see better
+                if base_channel[0:11] == 'H1:SUS-ETMX':
+                    threshold = 524288
+                    lpy[title] += (bufs[idx].data * coeff) / (4 * threshold)
+                else:
+                    threshold = config.get_saturation_threshold(get_sus_channel(base_channel, corner), gps, config.IFO)
+                    lpy[title] += (bufs[idx].data * coeff) / (4 * threshold)
 
         colors = ['#2c7fb8', '#e66101', '#5e3c99']
-        offset = -0.5
-        fig, axs = plt.subplots(3, sharex=True, figsize=(27,16))
+        fig, axs = plt.subplots(3, sharex=True, figsize=(27, 16))
         for ax, dof, color, title in zip(axs, lpy.values(), colors, titles):
             ax.plot(
                 t,
                 dof,
-                color = color,
-                label = title,
-                alpha = 0.8,
-                lw = 2
+                color=color,
+                label=title,
+                alpha=0.8,
+                lw=2,
             )
+            if base_channel[0:11] == 'H1:SUS-ETMX':
+                label = '524288 cts (sat threshold = 134217728)'
+            else:
+                label = 'saturation threshold'
             ax.axhline(
                 1,
                 color='red',
                 linestyle='--',
                 lw=3,
-                label = 'saturation threshold'
+                label=label,
             )
             ax.axhline(
                 -1,
                 color='red',
                 linestyle='--',
-                lw=3
+                lw=3,
             )
 
-            # offset = window[0] / 6 # window dependent offset from lock loss
-            offset = -0.5
-
             ax.set_ylim(-1.2, 1.2)
             ax.set_xlim(window[0], window[1])
             ax.set_xlabel(
@@ -106,7 +113,7 @@ def find_lpy(event):
         axs[0].set_title("Length-Pitch-Yaw Plots for {}".format(base_channel))
 
         outfile_plot = 'lpy_{}.png'.format(window_type)
-        outpath_plot = event.gen_path(outfile_plot)
+        outpath_plot = event.path(outfile_plot)
         fig.savefig(outpath_plot, bbox_inches='tight')
         fig.clf()
 
@@ -133,42 +140,154 @@ def channel2lpy_coeffs(channel):
 
     if optic in ['ETMX', 'ETMY', 'ITMX', 'ITMY']:
         if stage in ['M0']:
-            lpy_map['length'] = {'F2': -1, 'F3': -1}
-            lpy_map['pitch'] = {'F2': 1, 'F3': 1}
-            lpy_map['yaw'] = {'F2': 1, 'F3': -1}
+            F2_gain = -1
+            F3_gain = 1
+            lpy_map['length'] = {'F2': -1 * F2_gain, 'F3': -1 * F3_gain}
+            lpy_map['pitch'] = {'F2': 1 * F2_gain, 'F3': 1 * F3_gain}
+            lpy_map['yaw'] = {'F2': 1 * F2_gain, 'F3': -1 * F3_gain}
             lpy_map['corners'] = ['F2', 'F3']
-        elif stage in ['L1', 'L2', 'L3']:
-            lpy_map['length'] = {'UL': 1, 'LL': 1, 'UR': 1, 'LR': 1}
-            lpy_map['pitch'] = {'UL': 1, 'LL': -1, 'UR': 1, 'LR': -1}
-            lpy_map['yaw'] = {'UL': -1, 'LL': -1, 'UR': 1, 'LR': 1}
+        elif stage in ['L1']:
+            if config.IFO == 'H1':
+                if optic in ['ETMX']:
+                    UL_gain = -1
+                    LL_gain = 1
+                    UR_gain = -1
+                    LR_gain = 1
+                else:
+                    UL_gain = -1
+                    LL_gain = 1
+                    UR_gain = 1
+                    LR_gain = -1
+            else:
+                UL_gain = -1
+                LL_gain = 1
+                UR_gain = 1
+                LR_gain = -1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
+        elif stage in ['L2']:
+            if config.IFO == 'H1':
+                UL_gain = 1
+                LL_gain = -1
+                UR_gain = -1
+                LR_gain = 1
+            else:
+                UL_gain = -1
+                LL_gain = 1
+                UR_gain = 1
+                LR_gain = -1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
+        elif stage in ['L3']:
+            UL_gain = 1
+            LL_gain = 1
+            UR_gain = 1
+            LR_gain = 1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
             lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
     elif optic in ['MC1', 'MC2', 'MC3', 'PRM', 'PR2', 'PR3', 'SRM', 'SR2', 'SR3']:
         if stage in ['M1']:
-            lpy_map['length'] = {'LF': 1, 'RT': 1}
-            lpy_map['pitch'] = {'T2': 1, 'T3': -1}
-            lpy_map['yaw'] = {'LF': -1, 'RT': 1}
+            LF_gain = 1
+            RT_gain = -1
+            T2_gain = -1
+            T3_gain = 1
+            lpy_map['length'] = {'LF': 1 * LF_gain, 'RT': 1 * RT_gain}
+            lpy_map['pitch'] = {'T2': 1 * T2_gain, 'T3': -1 * T3_gain}
+            lpy_map['yaw'] = {'LF': -1 * LF_gain, 'RT': 1 * RT_gain}
             lpy_map['corners'] = ['T2', 'T3', 'LF', 'RT']
         elif stage in ['M2', 'M3']:
-            lpy_map['length'] = {'UL': 1, 'LL': 1, 'UR': 1, 'LR': 1}
-            lpy_map['pitch'] = {'UL': 1, 'LL': -1, 'UR': 1, 'LR': -1}
-            lpy_map['yaw'] = {'UL': -1, 'LL': -1, 'UR': 1, 'LR': 1}
+            if config.IFO == 'L1':
+                UL_gain = -1
+                LL_gain = 1
+                UR_gain = 1
+                LR_gain = -1
+            if config.IFO == 'H1':
+                UL_gain = 1
+                LL_gain = -1
+                UR_gain = -1
+                LR_gain = 1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
             lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
     elif optic in ['BS']:
         if stage in ['M1']:
-            lpy_map['length'] = {'LF': 1, 'RT': 1}
-            lpy_map['pitch'] = {'F2': -1, 'F3': -1}
-            lpy_map['yaw'] = {'LF': -1, 'RT': 1}
+            LF_gain = 1
+            RT_gain = -1
+            F2_gain = 1
+            F3_gain = -1
+            lpy_map['length'] = {'LF': 1 * LF_gain, 'RT': 1 * RT_gain}
+            lpy_map['pitch'] = {'F2': -1 * F2_gain, 'F3': -1 * F3_gain}
+            lpy_map['yaw'] = {'LF': -1 * LF_gain, 'RT': 1 * RT_gain}
             lpy_map['corners'] = ['F2', 'F3']
         elif stage in ['M2']:
-            lpy_map['length'] = {'UL': 1, 'LL': 1, 'UR': 1, 'LR': 1}
-            lpy_map['pitch'] = {'UL': 1, 'LL': -1, 'UR': 1, 'LR': -1}
-            lpy_map['yaw'] = {'UL': -1, 'LL': -1, 'UR': 1, 'LR': 1}
+            if config.IFO == 'L1':
+                UL_gain = -1
+                LL_gain = 1
+                UR_gain = 1
+                LR_gain = -1
+            if config.IFO == 'H1':
+                UL_gain = 1
+                LL_gain = -1
+                UR_gain = -1
+                LR_gain = 1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
             lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
     elif optic in ['OMC']:
         if stage in ['M1']:
-            lpy_map['length'] = {'LF': 1, 'RT': 1}
-            lpy_map['pitch'] = {'T2': 1, 'T3': -1}
-            lpy_map['yaw'] = {'LF': -1, 'RT': 1}
+            LF_gain = 1
+            RT_gain = -1
+            T2_gain = -1
+            T3_gain = 1
+            lpy_map['length'] = {'LF': 1 * LF_gain, 'RT': 1 * RT_gain}
+            lpy_map['pitch'] = {'T2': 1 * T2_gain, 'T3': -1 * T3_gain}
+            lpy_map['yaw'] = {'LF': -1 * LF_gain, 'RT': 1 * RT_gain}
             lpy_map['corners'] = ['T2', 'T3', 'LF', 'RT']
+    elif optic in ['OM1', 'OM3', 'RM1']:
+        if stage in ['M1']:
+            UL_gain = 1
+            LL_gain = -1
+            UR_gain = -1
+            LR_gain = 1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
+    elif optic in ['RM2']:
+        if stage in ['M1']:
+            if config.IFO == 'L1':
+                UL_gain = 1
+                LL_gain = -1
+                UR_gain = -1
+                LR_gain = 1
+            if config.IFO == 'H1':
+                UL_gain = -1
+                LL_gain = 1
+                UR_gain = 1
+                LR_gain = -1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
+    elif optic in ['OM2', 'ZM1', 'ZM2']:
+        if stage in ['M1']:
+            UL_gain = -1
+            LL_gain = 1
+            UR_gain = 1
+            LR_gain = -1
+            lpy_map['length'] = {'UL': 1 * UL_gain, 'LL': 1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['pitch'] = {'UL': 1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': -1 * LR_gain}
+            lpy_map['yaw'] = {'UL': -1 * UL_gain, 'LL': -1 * LL_gain, 'UR': 1 * UR_gain, 'LR': 1 * LR_gain}
+            lpy_map['corners'] = ['UL', 'LL', 'UR', 'LR']
+    else:
+        raise RuntimeError("no LPY map for suspension '{}'.".format(channel))
 
     return lpy_map

locklost/plugins/lsc_asc.py

+import os
+
 import numpy as np
 import matplotlib.pyplot as plt
-import os
 
 from gwpy.segments import Segment
 
@@ -8,15 +9,17 @@ from .. import config
 from .. import data
 from .. import plotutils
 
+
 ##############################################
 
+
 def plot_lsc_asc(event):
     """Plot LSC/ASC channels
 
     """
     gps = event.gps
     plotutils.set_rcparams()
-    os.mkdir(event.gen_path('thumbnails'))
+    os.mkdir(event.path('thumbnails'))
 
     main_fig, main_ax = plt.subplots(1, figsize=(22, 16))
     main_fig.tight_layout()
@@ -33,13 +36,13 @@ def plot_lsc_asc(event):
 
                 gen_plot(main_ax, buf, event, window, name)
                 outfile_plot = '{}_{}.png'.format(name, window_type)
-                outpath_plot = event.gen_path(outfile_plot)
+                outpath_plot = event.path(outfile_plot)
                 main_fig.savefig(outpath_plot, bbox_inches='tight')
                 main_ax.clear()
 
                 gen_plot(thumb_ax, buf, event, window, name)
                 outfile_plot = '{}_{}_{}.png'.format(name, window_type, 'thumbnail')
-                outpath_plot = event.gen_path('thumbnails', outfile_plot)
+                outpath_plot = event.path('thumbnails', outfile_plot)
                 thumb_fig.savefig(outpath_plot, bbox_inches='tight')
                 thumb_ax.clear()
 

locklost/plugins/observe.py

-from gwpy.segments import Segment
-
-from .. import config
-from .. import data
-
-##################################################
-
-def check_observe(event):
-    """Observe status at time of lock loss.
-
-    """
-    # use transition gps since that doesn't depend on refinement
-    gps = event.transition_gps
-
-    window = [-1, 0]
-    segment = Segment(*window).shift(gps)
-
-    buf = data.fetch([config.IFO+':GRD-IFO_OK'], segment)[0]
-
-    if bool(buf.data[0]):
-        event.add_tag('OBSERVE')

locklost/plugins/omc_dcpd.py

+import numpy as np
+
+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+from .. import plotutils
+
+
+##############################################
+
+
+def check_omc_dcpd(event):
+    """
+    Check if OMC DCPD is saturating.
+
+    Checks OMC_PD overflow channels for values greater than zero, one second
+    before the refined lockloss time. If so, creates OMC_DCPD tag.
+    """
+    plotutils.set_rcparams()
+
+    mod_window = [config.OMC_DCPD_WINDOW[0], config.OMC_DCPD_WINDOW[1]]
+    segment = Segment(mod_window).shift(int(event.gps))
+    channels = data.fetch(config.OMC_DCPD_CHANNELS, segment)
+
+    saturating = False
+    srate = channels[0].sample_rate
+    for buf in channels:
+        t = np.arange(segment[0], segment[1], 1/srate)
+        before_loss = buf.data[np.where(t < event.gps-(config.OMC_DCPD_BUFFER))]
+        if any(before_loss) > 0:
+            saturating = True
+
+    if saturating:
+        event.add_tag('OMC_DCPD')
+    else:
+        logger.info('OMC DCPD not saturating')

locklost/plugins/overflows.py

-import logging
 import itertools
+
 import numpy as np
 import matplotlib.pyplot as plt
 
 from gwpy.segments import Segment, SegmentList
 from gwpy.segments import DataQualityFlag, DataQualityDict
 
+from .. import logger
 from .. import config
 from .. import data
 
+
 #################################################
 
+
 def find_overflows(event):
     """Create ADC overflow plots centered around the lock loss time.
 
@@ -24,7 +27,7 @@ def find_overflows(event):
     plt.rcParams['xtick.labelsize'] = 16
     plt.rcParams['ytick.labelsize'] = 16
 
-    logging.info('acquiring ADC overflow data')
+    logger.info('acquiring ADC overflow data')
     segment = Segment(config.PLOT_WINDOWS['WIDE']).shift(gps)
     all_bufs = data.fetch(generate_all_overflow_channels(), segment)
 
@@ -34,7 +37,7 @@ def find_overflows(event):
         segment = Segment(window).shift(gps)
 
         for subsystem in config.ADC_OVERFLOWS.keys():
-            logging.info('plotting {} ADC overflows for {} subsystem'.format(
+            logger.info('plotting {} ADC overflows for {} subsystem'.format(
                 window_type,
                 subsystem,
             ))
@@ -42,7 +45,7 @@ def find_overflows(event):
                 adc_id = config.ADC_OVERFLOWS[subsystem]['ADC_ID']
                 channels = generate_overflow_channels(subsystem, bit1)
                 bufs = [buf for buf in all_bufs if buf.channel in channels]
-                bufs.sort(key = lambda x: x.channel)
+                bufs.sort(key=lambda x: x.channel)
 
                 srate = bufs[0].sample_rate
                 dt = 1/srate
@@ -97,18 +100,17 @@ def find_overflows(event):
                     bit1,
                     window_type,
                 )
-                outpath_plot = event.gen_path(outfile_plot)
+                outpath_plot = event.path(outfile_plot)
                 fig.savefig(outpath_plot, bbox_inches='tight')
                 fig.clf()
 
-                ### aggregate overflows for a specific ADC together
+                # aggregate overflows for a specific ADC together
                 union_name = '{}: ADC number {}'.format(subsystem, bit1)
                 overflows_overview[union_name] = overflows.union()
                 overflows_overview[union_name].name = union_name
 
-
-        ### overview overflow plot
-        logging.info('plotting {} ADC overflows overview'.format(window_type))
+        # overview overflow plot
+        logger.info('plotting {} ADC overflows overview'.format(window_type))
         fig = overflows_overview.plot(
             facecolor='darkred',
             edgecolor='darkred',
@@ -135,12 +137,14 @@ def find_overflows(event):
         )
 
         outfile_plot = 'adc_overflow_overview_{}.png'.format(window_type)
-        outpath_plot = event.gen_path(outfile_plot)
+        outpath_plot = event.path(outfile_plot)
         fig.savefig(outpath_plot, bbox_inches='tight')
         fig.clf()
 
 
-OVERFLOW_TEMPLATE='{}:FEC-{}_ADC_OVERFLOW_{}_{}'
+OVERFLOW_TEMPLATE = '{}:FEC-{}_ADC_OVERFLOW_{}_{}'
+
+
 def generate_overflow_channels(subsystem, bit1):
     ifo = config.IFO
     adc_id = config.ADC_OVERFLOWS[subsystem]['ADC_ID']

locklost/plugins/pi.py

+import numpy as np
+import matplotlib.pyplot as plt
+import matplotlib.gridspec as gridspec
+
+from gwpy.segments import Segment
+from gwpy.timeseries import TimeSeries
+
+from .. import logger
+from .. import config
+from .. import data
+from .. import plotutils
+
+
+ASD_CHANNEL = [
+    f'{config.IFO}:OMC-PI_DCPD_64KHZ_AHF_DQ'
+]
+ASD_WINDOW = [-(8*60), 0]
+
+
+##############################################
+
+
+def check_pi(event):
+    """Checks OMC downconverted signals 2, 6, 7 (H1) or
+    BAND 1-7 log channels (L1) for PIs.
+
+    Checks if PI band goes above threshold and
+    adds tag if above a certain threshold.
+
+    """
+    plotutils.set_rcparams()
+
+    mod_window = [config.PI_SEARCH_WINDOW[0], config.PI_SEARCH_WINDOW[1]]
+    segment = Segment(mod_window).shift(int(event.gps))
+    PI_channels = data.fetch(config.PI_CHANNELS, segment)
+
+    mod_window_asd = [ASD_WINDOW[0], ASD_WINDOW[1]]
+    segment_asd = Segment(mod_window_asd).shift(int(event.gps))
+    ASD_data = data.fetch(ASD_CHANNEL, segment_asd)[0]
+    asd_timeseries = TimeSeries(
+        ASD_data.data,
+        t0=segment_asd[0],
+        dt=1/ASD_data.sample_rate
+    )
+    time_frame = 33 * 2
+    fft_length = 16
+    overlap = fft_length / 2
+    before_pi = asd_timeseries.times.value - event.gps < ASD_WINDOW[0] + time_frame
+    during_pi = asd_timeseries.times.value - event.gps > -time_frame
+    asd_before = asd_timeseries[before_pi].asd(fftlength=fft_length, overlap=overlap)
+    asd_during = asd_timeseries[during_pi].asd(fftlength=fft_length, overlap=overlap)
+
+    saturating = False
+    for buf in PI_channels:
+        srate = buf.sample_rate
+        t = np.arange(segment[0], segment[1], 1/srate)
+        idxs = ((t-event.gps) < -2) & ((t-event.gps) > -20)
+        if np.max(buf.data[idxs]) > config.PI_SAT_THRESH:
+            saturating = True
+
+    if saturating:
+        if config.IFO == 'H1':
+            if event.transition_index[0] >= 600:
+                logger.info('PI found')
+                event.add_tag('PI_MONITOR')
+        if config.IFO == 'L1':
+            if event.transition_index[0] >= 1300:
+                event.add_tag('PI_MONITOR')
+    else:
+        logger.info('no PI')
+
+    gs = gridspec.GridSpec(2, 4)
+    gs.update(wspace=0.5)
+    fig = plt.figure(figsize=(22*3, 16*3))
+    ax1 = fig.add_subplot(gs[0, :2])
+    ax2 = fig.add_subplot(gs[0, 2:])
+    ax3 = fig.add_subplot(gs[1, :])
+    for idx, buf in enumerate(PI_channels):
+        srate = buf.sample_rate
+        t = np.arange(segment[0], segment[1], 1/srate)
+        # Plot all OMC PI channels on top two plots
+        for ax in [ax1, ax2]:
+            ax.plot(
+                t-event.gps,
+                buf.data,
+                label=f'{buf.channel[3:]}: {config.PI_DICT[buf.channel]}',
+                alpha=0.8,
+                lw=2,
+            )
+    # Configuring top two plots
+    for ax in [ax1, ax2]:
+        # Add dotted thresholds to the plots
+        ax.axhline(
+            config.PI_SAT_THRESH,
+            linestyle='--',
+            color='black',
+            label='PI threshold',
+            lw=5,
+        )
+        ax.axhline(
+            -config.PI_SAT_THRESH,
+            linestyle='--',
+            color='black',
+            lw=5,
+        )
+        ax.set_xlabel(f'Time [s] since lock loss at {event.gps}', labelpad=10)
+        ax.set_ylabel(config.PI_YLABEL)
+        ax.set_ylim(config.PI_YLIMS[0], config.PI_YLIMS[1])
+        ax.legend(loc='best')
+        ax.set_title('PI BLRMS Monitors')
+        ax.grid()
+
+    ax1.set_xlim(t[0]-event.gps, t[-1]-event.gps)
+    ax2.set_xlim(-20, 5)
+
+    ax3.plot(
+        asd_during.frequencies / 1000,
+        asd_during,
+        linewidth=1,
+        color='red',
+        label='Right before lockloss'
+    )
+    ax3.plot(
+        asd_before.frequencies / 1000, asd_before,
+        linewidth=1,
+        color='lightsteelblue',
+        label='8 min before lockloss'
+    )
+    ax3.set_yscale('log')
+    ax3.set_xscale('log')
+    ax3.set_xlim(5, 32)
+    ax3.set_title(f'ASD of {ASD_data.channel}')
+    ax3.set_ylabel('Magnitude')
+    ax3.set_xlabel('Frequency [kHz]')
+    ax3.legend(loc='best')
+    ax3.set_xticks(
+        np.arange(5, 32),
+        labels=['' if x % 5 != 0 else x for x in np.arange(5, 32)]
+    )
+    ax3.grid()
+
+    outfile_plot = 'PI_monitor.png'
+    outpath_plot = event.path(outfile_plot)
+    fig.savefig(outpath_plot, bbox_inches='tight')

locklost/plugins/sei_bs_trans.py

+from gwpy.segments import Segment
+
+from .. import logger
+from .. import config
+from .. import data
+
+
+WINDOW = [-3, 0]
+CHANNEL = ['{}:GRD-SEI_BS_STATE_N'.format(config.IFO)]
+
+
+##############################################
+
+
+def check_sei_bs(event):
+    """Checks if SEI_BS Guardian node is in transition state during lockloss and
+    creates a tag."""
+
+    if config.IFO == 'L1':
+        logger.info("followup is not configured or not applicable to LLO.")
+        return
+
+    mod_window = [WINDOW[0], WINDOW[1]]
+    segment = Segment(mod_window).shift(int(event.gps))
+    stage_2_channel = data.fetch(CHANNEL, segment)[0]
+
+    if any(stage_2_channel.data == -19):
+        event.add_tag('SEI_BS_TRANS')
+    else:
+        logger.info('SEI BS was not transitioning during lockloss')