B031 hergrt031bor2007 Latitude 43.6643 Longitude -123.3967 Elevation 71 m Install Date 2007-11-30 Contents Of Tar files for year YYYY File Contents B031.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B031.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B031.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B031.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B031.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B031.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B031.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B031.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B031.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B031.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 = 239.3 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 -73.030 99.566 -0.00138 -0.01150 0.000 0.00000 CH1 -2.010 15.807 -0.00105 -0.00742 0.000 0.00000 CH2 137.040 -80.138 -0.00172 -0.00140 0.000 0.00000 CH3 -1627.800 1727.200 -0.00013 0.12807 0.000 0.00000 Detrend reference date 2007-11-30T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -5.4 CH1 -4.7 CH2 -6.8 CH3 -14.9 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -131.963 6.587 CH0 O1 24.686 2.363 CH0 P1 70.116 0.506 CH0 K1 38.961 2.963 CH0 N2 -153.674 1.418 CH0 S2 -138.821 4.026 CH1 M2 -128.472 9.580 CH1 O1 90.997 6.694 CH1 P1 101.841 3.301 CH1 K1 83.427 10.792 CH1 N2 -100.825 3.167 CH1 S2 65.905 1.576 CH2 M2 48.624 16.468 CH2 O1 -103.737 8.304 CH2 P1 -111.619 3.646 CH2 K1 -107.200 11.424 CH2 N2 64.232 4.248 CH2 S2 71.606 4.432 CH3 M2 109.409 7.110 CH3 O1 -125.900 9.524 CH3 P1 -103.289 1.774 CH3 K1 -111.960 13.226 CH3 N2 115.483 3.180 CH3 S2 -175.684 6.991 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 = 239.3 ISOTROPIC 0.29629630 0.51851852 0.29629630 0.22222222 ISOTROPIC 0.06518774 -0.37027208 0.08292110 0.22216325 ISOTROPIC 0.38650443 -0.00853197 -0.38309164 0.00511918 Hodgkinson et al. (2013) Tidal Calibration KH2013 0.884 -0.454 1.042 -1.574 KH2013 0.43 -0.344 0.231 -0.068 KH2013 0.341 0.069 -0.495 0.095 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