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25 results for “Distributed Acoustic Sensing”
Shallow tremor list observed by Distributed acoustic sensing (DAS) and DAS data off Cape Muroto, southwest Japan
<p>Distributed Acoustic Sensing (DAS) data (hdf5 data) with the Muroto Cable, southwest Japan, when shallow tremors are observed (period: January 30–February 8, 2022).</p> <p>I added a list of shallow tremors observed by DAS and shallow very low frequency earthquakes (VLFEs) corresponding to these tremors in the newest version.</p> <p>The DAS measurement is conducted by AP Sensing with a sensing length of 55 km along the Muroto Cable. Gauge length is 40.8 m. The waveforms were stacked in successive 10 channels to downsample to 51-m channel spacing and decimated to 100 Hz sampling.</p> <p>The tremor analysis with this DAS data is presented in AGU Fall Meeting 2022 (https://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1101461) and written in a submitted paper.</p> <p>The filename of hdf5 DAS data show the start time (year-month-day_hour.minute.second) in UT. The data length of each file is one minute. The values of matrices in hdf5 files are converted to differential phase by multiplying pi/32768. After integrating the differential phases, phases can be converted to strain based on equation (10) of SEAFOM (2018) (https://seafom.com/?mdocs-file=1270). The optical wavelength of DAS system is 1550 nm, the effective index of refraction in sensing fiber is 1.4682, the photo-elastic scaling factor is 0.78.</p> <p>Data Set S1: Tremor list observed by DAS located from DAS and DONET data</p> <p>Data Set S2: Tremor list located from only DONET data</p> <p>Data Set S3: VLFE list which temporally correspond to tremors observed by DAS</p> <p>channelinfo.txt: DAS channel position information that are used for locating tremors. The channel position was determined by using the air gun signals.</p> <p>DONET broadband seismograms data can be downloaded from the website of National Research Institute for Earth Science and Disaster Resilience Hi-net (<a href="https://hinetwww11.bosai.go.jp/auth/download/cont/?LANG=en">https://hinetwww11.bosai.go.jp/auth/download/cont/?LANG=en</a>).</p>
Previously hidden landslide processes revealed using distributed acoustic sensing with nanostrain-rate sensitivity
<p>Data used to recreate figures in Ouellet et al. 2024 'Previously hidden landslide processes revealed using distributed acoustic sensing with nanostrain-rate sensitivity'. Data stored in NetCDF format as DAS strain and DAS strain rate for each of the six cable sections from west (1) to east (6). Data can be uploaded into Xarray and include interpolated locations (from GPS survey) and elevations (from terrestrial lidar scans).</p> <p>Weather station data (HOLLN-2021-01) from the COSMOS-UK observatory: https://cosmos.ceh.ac.uk/sites/HOLLN</p> <p>ShapeArray (SAA) data and DAS data provided by the British Geological Survey.</p> <p>Research funded through a Mitacs Accelerate International grant with two industry partners: BGC Engineering and LUNA OptaSense.</p>
Smart Distributed Acoustic Sensing video
<p>Video winner of the CITIC Divulga 2022 short scientific video contest</p>
Data for "Extraction and Inversion of Coherent Rayleigh Waves from Urban Anthropogenic Noise with Distributed Acoustic Sensing"
<p>Data for "Extraction and Inversion of Coherent Rayleigh Waves from Urban Anthropogenic Noise with Distributed Acoustic Sensing"</p> <p> </p>
Supporting Data for "Seismic Monitoring of Rockfalls Using Fiber-Optic Distributed Acoustic Sensing"
<p>This file contains data and MATLAB scripts to generate the figures presented in the manuscript "Seismic Monitoring of Rockfalls Using Fiber-Optic Distributed Acoustic Sensing".</p>
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