B065 gabiln065bcn2007 Latitude 36.74366667 Longitude -121.4741667 Elevation 643 m Install Date 2007-06-22 Contents Of Tar files for year YYYY File Contents B065.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B065.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B065.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B065.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B065.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B065.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B065.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B065.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B065.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B065.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 = 231.3 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 -77.900 -51.501 -0.00195 -0.02643 151.080 -0.00186 CH1 109.730 0.000 0.00000 -0.02249 0.000 0.00000 CH2 94.270 -363.330 -0.00576 -0.01634 628.420 -0.00829 CH3 -13.250 75.612 -0.00057 -0.01109 0.000 0.00000 Detrend reference date 2007-06-22T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -2.8 CH1 -2.1 CH2 -2.9 CH3 -3.0 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -127.239 2.365 CH0 O1 23.688 3.096 CH0 P1 62.745 0.341 CH0 K1 39.160 2.972 CH0 N2 -159.694 0.732 CH0 S2 -139.096 1.566 CH1 M2 0.051 10.605 CH1 O1 22.928 3.241 CH1 P1 48.210 0.871 CH1 K1 36.643 4.273 CH1 N2 -7.304 2.363 CH1 S2 17.389 5.790 CH2 M2 47.072 7.775 CH2 O1 -57.963 3.985 CH2 P1 -87.932 1.631 CH2 K1 -64.695 4.382 CH2 N2 58.495 1.737 CH2 S2 60.979 2.617 CH3 M2 93.887 2.673 CH3 O1 -44.739 2.583 CH3 P1 -93.631 1.023 CH3 K1 -60.415 2.617 CH3 N2 112.299 1.020 CH3 S2 159.253 1.317 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 = 231.3 ISOTROPIC 0.29629704 0.51851819 0.29629595 0.22222215 ISOTROPIC -0.04441840 -0.35342171 0.18578644 0.21205366 ISOTROPIC 0.38943797 -0.11075800 -0.34513451 0.06645454 Hodgkinson et al. (2013) Tidal Calibration KH2013 1.167 1.571 0.86 0.651 KH2013 0.215 -0.266 0.616 0.542 KH2013 0.756 -0.009 -0.57 -0.003 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