B916 marips916bcs2008 Latitude 36.1925 Longitude -117.6685 Elevation 1859.9 m Install Date 2008-03-13 Contents Of Tar files for year YYYY File Contents B916.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B916.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B916.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B916.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B916.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B916.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B916.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B916.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B916.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B916.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 = 303.6 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 -191.675 139.870 -0.00060 -0.00766 0.000 0.00000 CH1 -140.179 79.490 -0.00049 -0.00199 0.000 0.00000 CH2 -191.727 186.360 -0.00110 -0.01357 0.000 0.00000 CH3 -145.440 116.100 -0.00100 -0.00680 0.000 0.00000 Detrend reference date 2008-03-13T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -2.7 CH1 -2.9 CH2 -3.5 CH3 -2.3 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 23.934 8.943 CH0 O1 -34.739 5.034 CH0 P1 -28.143 1.820 CH0 K1 -37.761 5.506 CH0 N2 26.302 2.031 CH0 S2 26.459 3.394 CH1 M2 -123.062 4.575 CH1 O1 38.187 4.078 CH1 P1 48.283 1.915 CH1 K1 46.042 4.889 CH1 N2 -129.535 1.038 CH1 S2 -122.005 1.929 CH2 M2 6.369 13.231 CH2 O1 25.246 2.875 CH2 P1 49.726 1.393 CH2 K1 45.919 2.863 CH2 N2 0.845 2.429 CH2 S2 12.014 7.111 CH3 M2 23.749 10.300 CH3 O1 -80.241 2.225 CH3 P1 -83.115 0.689 CH3 K1 -90.206 2.446 CH3 N2 22.662 2.167 CH3 S2 27.883 4.792 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 = 303.6 ISOTROPIC 0.29629673 0.51851800 0.29629619 0.22222241 ISOTROPIC 0.26180113 0.22392327 -0.35136962 -0.13435477 ISOTROPIC -0.29171096 0.29501289 0.17370550 -0.17700742 Hodgkinson et al. (2013) Tidal Calibration KH2013 1.246 1.172 0.816 0.022 KH2013 0.431 0.378 -0.4 -0.234 KH2013 -0.271 0.441 0.179 -0.305 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