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KAGRA VIS Ops Manual - Info on Foton and filter files

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The CDSFilt part can used in a model to represent a bank of ten filters. When the model is compiled and run, filter definitions for all the CDSFilt blocks are looked for in /opt/rtcds/${site}/${ifo}/chans/${MODEL}.txt, e.g., /opt/rtcds/kagra/k1/chans/VISBS.txt.

Currently there is no consistent system for the use of symbolic links. Some of the .txt files are symlinks to files of the same name in /opt/rtcds/release/vis/k1/filterfiles/, whereas others are plain files.

Foton follows symbolic links consistently, so there should be no problems with wiping out a link in the process of editing it.