B036 grants036bor2007 Latitude 42.5058 Longitude -123.3817 Elevation 315.3 m Install Date 2007-05-08 Contents Of Tar files for year YYYY File Contents B036.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B036.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B036.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B036.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B036.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B036.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B036.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B036.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B036.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B036.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 = 258.9 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 -307.330 58.293 -0.00255 -0.07871 243.930 0.00017 CH1 -292.711 -0.000 0.00000 0.01320 274.040 -0.00039 CH2 -69.790 0.000 0.00000 -0.00279 54.818 -0.00069 CH3 261.830 0.000 0.00000 0.01582 -237.060 -0.00109 Detrend reference date 2007-05-08T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -3.2 CH1 -4.8 CH2 -4.1 CH3 -3.7 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 23.947 6.032 CH0 O1 -25.427 6.001 CH0 P1 -5.315 1.779 CH0 K1 -32.019 6.792 CH0 N2 67.203 1.517 CH0 S2 -45.925 1.124 CH1 M2 -141.797 18.896 CH1 O1 126.074 9.434 CH1 P1 107.175 5.825 CH1 K1 105.602 11.256 CH1 N2 -125.260 4.621 CH1 S2 -157.386 4.695 CH2 M2 79.058 6.767 CH2 O1 -128.300 4.961 CH2 P1 -159.618 1.577 CH2 K1 -123.559 5.371 CH2 N2 74.021 1.657 CH2 S2 100.757 3.235 CH3 M2 57.681 13.486 CH3 O1 -80.599 7.983 CH3 P1 -94.723 2.341 CH3 K1 -84.836 10.619 CH3 N2 74.678 3.757 CH3 S2 87.593 2.986 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 = 258.9 ISOTROPIC 0.29629671 0.51851803 0.29629619 0.22222240 ISOTROPIC 0.29443679 -0.29265170 -0.17737577 0.17559068 ISOTROPIC 0.25873187 0.22700100 -0.34953145 -0.13620142 Roeloffs 2010 Tidal Calibration Calculated CH0 orientation = 262.7 degrees east of north ER2010 -0.48673940 -2.00650029 -0.52018829 -1.41041779 ER2010 0.49355331 0.30593631 -0.08716716 0.45644161 ER2010 0.52783015 0.58241021 -0.37847836 0.11192690 Reference: Roeloffs, E. (2010), Tidal calibration of Plate Boundary Observatory borehole strainmeters: Roles of vertical and shear coupling, J. Geophys. Res., 115, B06405, doi:10.1029/2009JB006407. Hodgkinson et al. (2013) Tidal Calibration KH2013 -0.11 -2.054 -0.876 -1.464 KH2013 0.55 0.426 -0.06 0.596 KH2013 0.586 0.704 -0.366 0.248 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