For the past few days, the interferometer lock acquisition has been unstable. It is helpful to solve the problem if we could see the difference in values that the commissioners adjust (such as switches, gains, offsets, and others) between when the lock acquisitio is stable and when it is unstable. (Mainly, this is Aso-san's idea)

• I investigated the number of channels recorded in the frame file. The number of channels for the full frame is 170850, so it is unrealistic to take all these differences and compare the results by the eye. Of these, a number of channels of 16Hz sampling is 165967. To reduce the computational cost, I applied further filtering as follows. As a result, the number of channels is reduced to 72801 (I attached this channel list). If you have a better condition, please let me know.
  • % cat frame.txt | grep "16$" | grep -v -e "_OUT" -e "_OUT16" -e "_IN" -e "EXC" -e ":CRY" -e ":VAC" -e ":PEM" -e ":FEC" -e ":DAQ" -e ":CAL" -e ":GIF" -e "MZM" -e "_DATE" -e "RMS" -e ":PRE" -e ":DET" -e ":NAB" -e ":DAS" -e ":OPS" -e "_OK" -e "WIT" -e "MON" -e "NORM" -e "TEMPERATURE" -e "PWD" -e "AIR" -e "MADC" -e "TRIG_SIG" -e :SYS -e "TIME_UP" -e "_WORKER" -e "NOTIFICATION" -e "_STATUS" -e "GUARD_ALIVE_COUNTEROUT" -e "PMC_RELOCK" > channel.txt
• We read the data of 72801 channels and take the differences between two specific times. It takes about 1 minute to read a second of data. This is realistically feasible. Taking the differences between the two times finished quickly.
• I took the differences for the values related to the interferometer between 4:00 JST and 8:00 JST this morning. I found 48 differences in interferometer values which the commissioner changes manually. I attached the list.
• In the future, I will implement this feature on Pastavi so that you can run it on the web browser. I need the name of this feature.