diff --git a/bilby/gw/likelihood.py b/bilby/gw/likelihood.py
index f98c4b366a5bf4bb74317877a420ee2d05ed1df0..7c32e80e024e195338af8668601c66b1785c2243 100644
--- a/bilby/gw/likelihood.py
+++ b/bilby/gw/likelihood.py
@@ -865,6 +865,7 @@ class ROQGravitationalWaveTransient(GravitationalWaveTransient):
         indices, in_bounds = self._closest_time_indices(
             ifo_time, self.weights['time_samples'])
         if not in_bounds:
+            logger.debug("SNR calculation error: requested time at edge of ROQ time samples")
             return self._CalculatedSNRs(
                 d_inner_h=np.nan_to_num(-np.inf), optimal_snr_squared=0,
                 complex_matched_filter_snr=np.nan_to_num(-np.inf),
@@ -924,7 +925,7 @@ class ROQGravitationalWaveTransient(GravitationalWaveTransient):
 
         """
 
-        earth_light_crossing_time = radius_of_earth / speed_of_light
+        earth_light_crossing_time = 2 * radius_of_earth / speed_of_light
         time_space = self._get_time_resolution()
         delta_times = np.arange(
             self.priors['geocent_time'].minimum - earth_light_crossing_time,