B045 rdcrst045bcn2008 Latitude 40.436 Longitude -123.9965 Elevation 29.4 m Install Date 2008-09-17 Contents Of Tar files for year YYYY File Contents B045.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B045.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B045.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B045.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B045.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B045.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B045.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B045.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B045.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B045.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 = 227.7 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 13.980 -17.898 -0.00106 -0.00130 0.000 0.00000 CH1 144.670 -151.700 -0.00046 0.00403 0.000 0.00000 CH2 -104.455 119.900 -0.00158 -0.03503 0.000 0.00000 CH3 -55.860 70.890 -0.00217 -0.02374 0.000 0.00000 Detrend reference date 2008-09-17T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -18.9 CH1 -14.4 CH2 -19.0 CH3 -18.2 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -142.140 20.502 CH0 O1 106.599 3.298 CH0 P1 99.196 1.458 CH0 K1 91.030 4.705 CH0 N2 -136.196 3.983 CH0 S2 -155.914 9.695 CH1 M2 -140.799 1.338 CH1 O1 -168.858 4.820 CH1 P1 -166.744 2.199 CH1 K1 -169.106 6.338 CH1 N2 -114.267 0.555 CH1 S2 141.247 1.772 CH2 M2 98.041 7.405 CH2 O1 -126.015 6.860 CH2 P1 -132.843 3.398 CH2 K1 -125.684 9.210 CH2 N2 95.604 2.228 CH2 S2 138.145 4.405 CH3 M2 -161.018 9.525 CH3 O1 -91.626 1.201 CH3 P1 -117.407 0.553 CH3 K1 -81.520 1.356 CH3 N2 -174.735 1.583 CH3 S2 -171.093 6.542 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 = 227.7 ISOTROPIC 0.29629721 0.51851799 0.29629578 0.22222235 ISOTROPIC -0.09287766 -0.33675307 0.22757810 0.20205263 ISOTROPIC 0.38080074 -0.15418013 -0.31912790 0.09250728 Hodgkinson et al. (2013) Tidal Calibration KH2013 -0.957 -1.723 -0.581 0.116 KH2013 0.158 -0.37 0.0 0.304 KH2013 0.459 0.131 -0.491 -0.084 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