B078 goldhl078bsc2006 Latitude 35.8377 Longitude -120.3452 Elevation 386.8 m Install Date 2006-10-12 Contents Of Tar files for year YYYY File Contents B078.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B078.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B078.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B078.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B078.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B078.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B078.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B078.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B078.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B078.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 = 279.7 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 19.650 -22.515 -0.00542 -0.00207 0.000 0.00000 CH1 38.380 -88.682 -0.00773 -0.00327 0.000 0.00000 CH2 -3.870 35.863 -0.00698 -0.00110 0.000 0.00000 CH3 -3.640 12.303 -0.00049 -0.00051 0.000 0.00000 Detrend reference date 2006-10-12T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -5.2 CH1 -5.3 CH2 0.0 CH3 -3.9 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -175.718 2.445 CH0 O1 -45.282 0.414 CH0 P1 -4.767 0.527 CH0 K1 -67.480 1.001 CH0 N2 164.177 0.537 CH0 S2 -169.096 2.028 CH1 M2 -124.957 2.513 CH1 O1 127.405 2.098 CH1 P1 107.149 0.801 CH1 K1 137.655 2.454 CH1 N2 -124.598 0.773 CH1 S2 -145.974 0.842 CH2 M2 0.0 0.0 CH2 O1 0.0 0.0 CH2 P1 0.0 0.0 CH2 K1 0.0 0.0 CH2 N2 0.0 0.0 CH2 S2 0.0 0.0 CH3 M2 30.607 6.072 CH3 O1 -33.600 3.839 CH3 P1 -25.181 1.664 CH3 K1 -34.433 4.676 CH3 N2 37.166 1.434 CH3 S2 41.419 1.911 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 = 279.7 ISOTROPIC -0.00000000 0.66666667 0.00000000 0.66666667 ISOTROPIC 0.75666398 -0.25048311 0.00000000 -0.50618087 ISOTROPIC 0.14160582 0.29224366 0.00000000 -0.43384948 Hodgkinson et al. (2013) Tidal Calibration KH2013 1.666 7.587 0.477 5.894 KH2013 1.404 0.58 -0.604 1.016 KH2013 1.572 3.261 -0.877 1.895 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