This is because the ASD of the strain channel differs greatly between low and high frequencies.
This difference is even greater at PRFPMI and needs to handle.
I compared the strain plotted in the following three settings.
1. FFT length 4s
2. FFT length 60s
3. FFT length 4s + high pass filter 10Hz
The data used are the following times:
LSC_LOCK guardian state : PRFPMI_RF_LOCKED
GPS time : 1359200000 - 1359200600
The attached files are the strain of each setting.
2 and 3 improve the strain by a few tens of Hz.
Therefore, I choose setting 3 for SummaryPage.
