B058 sjgrad058bcn2007 Latitude 36.7995 Longitude -121.58083 Elevation 114.2 m Install Date 2007-05-17 Contents Of Tar files for year YYYY File Contents B058.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B058.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B058.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B058.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B058.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B058.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B058.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B058.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B058.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B058.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 = 349.9 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 13.270 -136.040 -0.02278 -0.01379 63.861 -0.00126 CH1 -126.378 35.875 -0.00583 -0.00595 122.540 -0.00075 CH2 -137.734 0.000 0.00000 -0.01219 131.910 -0.00117 CH3 -154.362 0.000 0.00000 -0.00126 207.010 -0.00102 Detrend reference date 2007-05-17T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -3.6 CH1 -4.2 CH2 -5.0 CH3 -7.2 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 36.794 10.348 CH0 O1 -39.294 4.805 CH0 P1 -58.799 2.286 CH0 K1 -39.707 6.006 CH0 N2 47.072 2.143 CH0 S2 39.247 3.938 CH1 M2 -162.357 3.995 CH1 O1 106.580 0.893 CH1 P1 -133.124 0.739 CH1 K1 76.137 0.903 CH1 N2 -174.133 1.095 CH1 S2 -168.815 2.105 CH2 M2 -34.010 6.289 CH2 O1 61.450 2.446 CH2 P1 23.927 0.718 CH2 K1 57.027 4.434 CH2 N2 -39.927 1.829 CH2 S2 7.494 3.104 CH3 M2 15.012 11.254 CH3 O1 -11.921 3.444 CH3 P1 -42.207 5.533 CH3 K1 -31.583 7.716 CH3 N2 7.725 2.189 CH3 S2 32.349 4.103 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 = 349.9 ISOTROPIC 0.29629647 0.51851830 0.29629643 0.22222213 ISOTROPIC -0.30328622 0.28455153 0.18946558 -0.17073088 ISOTROPIC -0.24829903 -0.23707498 0.34312828 0.14224573 Hodgkinson et al. (2013) Tidal Calibration KH2013 2.594 3.477 1.995 0.436 KH2013 0.855 0.223 -0.808 -0.021 KH2013 0.641 2.077 0.928 -0.445 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