B020 wirkla020bwa2008 Latitude 46.3827 Longitude -123.8445 Elevation 31.2 m Install Date 2008-03-30 Contents Of Tar files for year YYYY File Contents B020.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B020.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B020.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B020.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B020.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B020.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B020.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B020.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B020.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B020.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 = 262.6 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 -73.700 0.000 0.00000 -0.00412 75.117 -0.00123 CH1 37.320 -316.050 -0.00469 0.00144 281.030 -0.00607 CH2 28.420 0.000 0.00000 0.09912 0.000 0.00000 CH3 153.630 -279.770 -0.00262 0.00332 0.000 0.00000 Detrend reference date /detrend_ref Barometric Response Gauge Response(ns/millibar) CH0 -32.6 CH1 -22.9 CH2 -17.1 CH3 -19.3 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 71.569 12.379 CH0 O1 -48.211 6.803 CH0 P1 -54.194 2.797 CH0 K1 -70.679 8.554 CH0 N2 97.215 4.005 CH0 S2 -142.347 0.532 CH1 M2 -170.875 17.956 CH1 O1 154.481 6.965 CH1 P1 143.224 3.028 CH1 K1 147.048 8.218 CH1 N2 -154.313 3.580 CH1 S2 170.477 6.240 CH2 M2 -164.503 11.000 CH2 O1 168.026 6.074 CH2 P1 160.056 2.680 CH2 K1 165.759 7.139 CH2 N2 -150.996 2.061 CH2 S2 177.439 4.901 CH3 M2 -61.289 16.935 CH3 O1 -172.204 16.759 CH3 P1 -173.110 7.108 CH3 K1 -169.671 20.792 CH3 N2 -36.581 3.754 CH3 S2 -156.568 5.668 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 = 262.6 ISOTROPIC 0.29629685 0.51851801 0.29629612 0.22222236 ISOTROPIC 0.32530760 -0.26097751 -0.22091630 0.15658621 ISOTROPIC 0.21865454 0.26280250 -0.32377477 -0.15768227 Tue Aug 29 18:33:42 MDT 2017