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= O3GK reprocess log =


This is a log of problems and solutions during O3GK reprocess.
You can get some plots used in the following struggling [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11739|here]]

Processed data period: K1-DET_FOR_GRB200415A is used. The first 2sec. and the last 32 sec. in each segment is removed. 

6/2: O3GK configuration file is the following.

[[https://github.com/gw-detchar/tools/blob/master/Omicron/Parameter/O3rerun_4096.txt]]

[[https://github.com/gw-detchar/tools/blob/master/Omicron/Parameter/O3rerun_2048.txt]]

[[https://github.com/gw-detchar/tools/blob/master/Omicron/Parameter/O3rerun_1024.txt]]

[[https://github.com/gw-detchar/tools/blob/master/Omicron/Parameter/O3rerun_512.txt]]

[[https://github.com/gw-detchar/tools/blob/master/Omicron/Parameter/O3rerun_256.txt]]

{{{manual_segment.sh}}} is used.
{{{
manual_segment.sh ${config_file} ${segment_file}
}}}
 
----

Some channels had error message like 
{{{Omicron::ExtractTriggers: the maximum trigger rate (5000.00000 Hz) is exceeded }}}

Case 1: At the lock loss
 ex. K1:CAL-CS_PROC_DARM_DISPLACEMENT_DQ, K1:LSC-MICH_IN1_DQ
 -> Solution: The last 30 sec of segment is not used in Omicron.

Case 2: Appearance or disappearance of line noise
 ex. K1:PEM-MIC_OMC_TABLE_AS_Z_OUT_DQ, K1:PEM-MAG_EXC_BOOTH_EXC_Y_OUT_DQ
 -> Solution: Reprocess Omicron with only failed short segments.

Case 3: Unused channels
 ex. K1:IMC-IMMT1_TRANS_QPDA2_DC_PIT_OUT_DQ, K1:LSC-REFL_PDA2_DC_OUT_DQ
 -> Solution: Skip these channels

Case 4: Strange behavior
 ex. K1:AOS-TMSX(Y)_GR_(Q)PDA1_(SUM_)OUT_DQ, K1:OMC-PZT_LV_OUT_DQ
 -> Solution: Skip these channels (We may better to investigate them )

 
----

Some channels had error message like 

{{{Sample::SetFrequencies: upsampling is not supported}}}

{{{Omicron::LoadData: incompatible native/working frequency}}}

-> Solution: The channel is moved to the appropriate configuration file. (Configuration file is divided by sampling frequency)

----

Some channels had error message like 

{{{Omicron::Condition: input vector is flat}}}

-> Solution: This channel is not working. Skipped.

----

Some channels had error message like 

{{{Spectrum::AddData: the input data vector is too small to compute a PSD with this resolution}}}

{{{Omicron::Condition: warning: this chunk is not used for PSD(1) estimation}}}

-> Because the output file is available as usual, this message is ignored.