Correlation Analysis based on Glitch Monitoring
Project description
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The CAGMon is the tool that evaluates the dependence between the primary and auxiliary channels of Gravitational-Wave detectors.
The goal of this project is to find a systematic way of identifying the abnormal glitches in the gravitational-wave data using various methods of correlation analysis. Usually, the community such as LIGO, Virgo, and KAGRA uses a conventional way of finding glitches in auxiliary channels of the detector - Klein-Welle, Omicron, Ordered Veto Lists, etc. However, some different ways can be possible to find and monitor them in a (quasi-) realtime. Also, the method can point out which channel is responsible for the found glitch. In this project, we study its possible to apply three different correlation methods - maximal information coefficient, Pearson's correlation coefficient, and Kendall's tau coefficient - in the gravitational wave data from the KAGRA detector.
Status
References
The CAGMon algorithm is described in
- Piljong Jung, Sang Hoon Oh, Young-Min Kim, Edwin J. Son, John J. Oh, Optimizing Parameters of Information-Theoretic Correlation Measurement for Multi-Channel Time-Series Datasets in Gravitational Wave Detectors, arXiv:2107.03516
- Piljong Jung, Sang Hoon Oh, Young-Min Kim, Edwin J. Son, John J. Oh, Identifying and diagnosing coherent associations and causalities between multi-channels of the gravitational wave detector, JGW-P2113130
Installation
$ git clone https://github.com/pjjung/cagmon.git
$ cd cagmon
$ python setup.py install
Syntax of configuration files (.ini)
- Example of full configurations
[GENERAL]
gps_start_time = 1234500000
gps_end_time = 1234599968
stride = 512
[PREPROSECCING]
datasize = 8192
filter_type = highpass (or low/bandpass)
frequency1 = 10 (if bandpass file is applied, two frequency conditions are required; frequncy1 and crequncy2)
[SEGMENT]
defined_condition = LSC_LOCK_STATE_CHANNEL == 10 (or segment_file_path = /path/to/segment/file/)
[CHANNELS]
main_channel = GW-STRAIN_CHANNEL
aux_channels_file_path = /path/to/channel/list/file
[INPUT AND OUTPUT PATHS]
frame_files_path = /path/to/frame/file/folder
output_path = /path/to/output/folder
- Example of essential configurations
[GENERAL]
gps_start_time = 1234500000
gps_end_time = 1234599968
stride = 512
[SEGMENT]
defined_condition = LSC_LOCK_STATE_CHANNEL == 10 (or segment_file_path = /path/to/segment/file/)
[CHANNELS]
main_channel = GW-STRAIN_CHANNEL
aux_channels_file_path = /path/to/channel/list/file
[INPUT AND OUTPUT PATHS]
frame_files_path = /path/to/frame/file/folder
output_path = /path/to/output/folder
Syntax of Channel list files
- Type 1
K1:AUX_CHANNEL_NAME_1
K1:AUX_CHANNEL_NAME_2
K1:AUX_CHANNEL_NAME_3
.
.
.
- Type 1
K1:AUX_CHANNEL_NAME_1 SAMPLE_RATE
K1:AUX_CHANNEL_NAME_2 SAMPLE_RATE
K1:AUX_CHANNEL_NAME_3 SAMPLE_RATE
.
.
.
Execute the CAGMon etude
$ cagmon --config cagmon_config.ini
License
The CAGMon is following the GNU General Public License version 3. Under this term, you can redistribute and/or modify it. See the GNU free software license for more details.
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