B944 grantt944bwy2008 Latitude 44.3897 Longitude -110.5438 Elevation 2364.6 m Install Date 2008-08-06 at at at at at at at at at at at at at at at at at at at at Contents Of Tar files for year YYYY File Contents B944.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B944.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B944.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B944.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B944.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B944.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B944.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B944.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B944.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B944.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 = 325.1 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 -101.977 107.860 -0.00241 -0.00964 0.000 0.00000 CH1 40.630 -40.549 -0.00090 0.00089 0.000 0.00000 CH2 -27.010 22.902 -0.00159 0.00121 0.000 0.00000 CH3 -44.150 50.518 -0.00412 -0.00360 0.000 0.00000 Detrend reference date 2008-08-06T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -12.2 CH1 -3.3 CH2 -5.7 CH3 -10.5 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 11.502 22.951 CH0 O1 -5.606 9.255 CH0 P1 -8.255 3.446 CH0 K1 -4.613 9.012 CH0 N2 10.460 4.205 CH0 S2 8.533 11.030 CH1 M2 -167.559 9.661 CH1 O1 177.121 3.939 CH1 P1 176.281 3.855 CH1 K1 -175.510 2.920 CH1 N2 -175.965 1.728 CH1 S2 -172.411 5.192 CH2 M2 -53.970 1.221 CH2 O1 -175.937 1.222 CH2 P1 179.265 1.501 CH2 K1 161.611 1.746 CH2 N2 -68.232 0.154 CH2 S2 -85.145 0.592 CH3 M2 6.948 16.235 CH3 O1 -5.239 5.762 CH3 P1 -7.116 1.797 CH3 K1 -0.936 5.471 CH3 N2 6.349 2.939 CH3 S2 3.707 7.762 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 = 325.1 ISOTROPIC 0.29629699 0.51851828 0.29629596 0.22222210 ISOTROPIC -0.00747655 0.36496537 -0.13850896 -0.21897985 ISOTROPIC -0.39189181 0.06304333 0.36667395 -0.03782548 Hodgkinson et al. (2013) Tidal Calibration KH2013 -4.819 0.575 -8.792 8.118 KH2013 -2.845 0.319 -5.908 3.837 KH2013 -7.061 1.511 -6.825 10.756 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