Getting Started on the ISC design
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To redo the A1 ISC design, it wll be necessary to understand:

#. the physcs of laser nterferometry
#. moulaton / emodulaton fos signal extraction
#. feedback loops (MIMO & SISO)
#. how to use Fnesse/pyKat to smulate these thngs

How does Finesse work?
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https://dcc.ligo.org/LIGO-G1901578


Howto / Syntax on .RST files:
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https://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html