B202 windyr202bwa2007 Latitude 46.2447 Longitude -122.1367 Elevation 1218.6 m Install Date 2007-07-25 Contents Of Tar files for year YYYY File Contents B202.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B202.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B202.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B202.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B202.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B202.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B202.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B202.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B202.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B202.YYYY.xml.2Ene.ER2010.txt.gz Processed engineering shear strain, Roeloffs [2010], calibration Description of Level 2 Borehole Strainmeter ASCII files. Column 1 Description of data, gauge0, gauge1 etc Column 2 Date, YYYY-MM-DDTHH:mm:ss Column 3 Day of year Column 4 Modified Julian Date Column 5 Strain (microstrain). No offsets, trends, tides or barometric corrections have been applied. Column 6 Running sum of offsets Column 7 Strain data quality flag (g=good, b=bad, m=missing) Column 8 Tidal correction (microstrain) Column 9 Borehole trend correction (microstrain) Column 10 Barometric pressure correction (microstrain) Column 11 Barometric pressure data quality flag (g=good, b=bad, m=missing, i=interpolated) Column 12 Level, quality (2a= rapid processing, 2b=post processed) Column 13 Version, data generation date Column 14 Barometeric pressure (millibars) To produce strain data with offsets, tides, trends, tides and barometric pressure effect removed use Final_Strain=Column5+Column6-Column8-Column9-Column10 Processing Information Manufacturer: GTSM Technologies Manufacturer Gauge Scale Factor: 0.05 nanostrain per digital count Manufacturer Areal Scale Factor: 1.5 Manufacturer Shear Scale Factor: 3.0 Manufacturer Gauge Weightings: CH0=1, CH1=1, CH2=1, CH3=1 CH0 Orientation recorded in field = 207.7 degrees east of north Borehole Trend Models, calculated in days, y=F+A1*exp(T1*t)+M*t+A2*exp(T2*t) Gauge F A1 T1 M A2 T2 CH0 -118.175 85.640 -0.00842 -0.05010 41.852 0.00032 CH1 -85.270 60.495 -0.00230 -0.01354 0.000 0.00000 CH2 -72.260 59.344 -0.00255 -0.01105 0.000 0.00000 CH3 -88.350 88.879 -0.00236 -0.01507 0.000 0.00000 Detrend reference date 2007-07-25T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -2.5 CH1 -1.0 CH2 -3.2 CH3 -2.9 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -24.245 11.312 CH0 O1 19.724 9.065 CH0 K1 22.501 10.873 CH0 N2 -24.557 1.740 CH0 S2 -31.272 5.766 CH1 M2 178.226 6.465 CH1 O1 179.988 4.400 CH1 K1 174.703 3.741 CH1 N2 -164.343 1.104 CH1 S2 157.886 2.650 CH2 M2 24.410 3.920 CH2 O1 -46.462 2.406 CH2 K1 -40.590 3.131 CH2 N2 54.552 0.939 CH2 S2 -4.092 0.566 CH3 M2 -7.850 10.369 CH3 O1 3.775 7.352 CH3 K1 5.483 8.191 CH3 N2 6.993 1.621 CH3 S2 -25.195 4.414 Strain Matrices To Compute Areal and Shear Strain from Gauge Strain Manufacturer's Isotropic Strain Matrix, C=1.5, D=3.0, Gauge Weights=1, Orientation = 207.7 ISOTROPIC 0.29629695 0.51851755 0.29629624 0.22222260 ISOTROPIC -0.31592220 -0.15886309 0.37946664 0.09531866 ISOTROPIC 0.23200995 -0.33456924 -0.09818232 0.20074161 Hodgkinson et al. (2013) Tidal Calibration KH2013 -7.526 1.352 -9.466 13.265 KH2013 8.741 -3.109 13.926 -14.913 KH2013 5.791 -0.931 5.941 -8.543 Reference: Table 2. Hodgkinson, K., J. Langbein, B. Henderson, D. Mencin, and A. Borsa (2013), Tidal calibration of plate boundary observatory borehole strainmeters, J. Geophys. Res. Solid Earth, 118, 447–458, doi:10.1029/2012JB009651. Wed Dec 27 11:27:32 UTC-06:00 2023