B075 flengt075bcs2006 Latitude 35.9292 Longitude -120.5153 Elevation 583 m Install Date 2006-10-13 Contents Of Tar files for year YYYY File Contents B075.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B075.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B075.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B075.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B075.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B075.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B075.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B075.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B075.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B075.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 = 321.9 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 55.630 -153.130 -0.00524 -0.00150 0.000 0.00000 CH1 132.720 -149.260 -0.00330 -0.00096 0.000 0.00000 CH2 165.470 -211.740 -0.00381 -0.00220 0.000 0.00000 CH3 55.430 -133.500 -0.00366 -0.00224 0.000 0.00000 Detrend reference date /detrend_ref Barometric Response Gauge Response(ns/millibar) CH0 -7.5 CH1 -7.0 CH2 -6.7 CH3 -6.4 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -161.544 6.012 CH0 O1 -176.626 4.123 CH0 P1 174.178 1.927 CH0 K1 176.757 4.467 CH0 N2 -152.288 0.923 CH0 S2 175.799 3.646 CH1 M2 -159.976 6.363 CH1 O1 177.830 2.042 CH1 P1 166.882 1.254 CH1 K1 171.451 2.216 CH1 N2 -164.786 1.192 CH1 S2 -171.513 3.900 CH2 M2 -149.494 5.398 CH2 O1 161.530 3.575 CH2 P1 158.729 1.897 CH2 K1 155.031 4.340 CH2 N2 -139.248 1.109 CH2 S2 -179.625 2.647 CH3 M2 -156.784 3.593 CH3 O1 172.772 3.562 CH3 P1 163.605 1.814 CH3 K1 163.208 4.156 CH3 N2 -130.342 0.634 CH3 S2 159.944 2.189 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 = 321.9 ISOTROPIC 0.44444444 0.44444444 0.44444444 0.00000000 ISOTROPIC -0.10601487 0.42679719 -0.32078232 0.00000000 ISOTROPIC -0.43161524 0.12399605 0.30761919 0.00000000 Hodgkinson et al. (2013) Tidal Calibration KH2013 -1.904 -1.123 0.48 -0.688 KH2013 -0.012 1.134 -0.398 -0.748 KH2013 -1.766 0.757 2.344 -0.785 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