B076 donnal076bcs2006 Latitude 35.9398 Longitude -120.4248 Elevation 445 m Install Date 2006-10-13 Contents Of Tar files for year YYYY File Contents B076.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B076.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B076.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B076.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B076.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B076.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B076.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B076.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B076.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B076.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 = 278.5 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 -8.010 106.220 -0.00110 0.01084 0.000 0.00000 CH1 348.870 -92.637 -0.00158 0.00479 0.000 0.00000 CH2 110.660 0.000 0.00000 -0.01360 0.000 0.00000 CH3 -31.040 -14.213 -0.00003 -0.02460 0.000 0.00000 Detrend reference date /detrend_ref Barometric Response Gauge Response(ns/millibar) CH0 -8.1 CH1 -8.8 CH2 -7.0 CH3 -6.4 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -176.276 9.018 CH0 O1 -153.239 2.350 CH0 P1 -88.006 0.544 CH0 K1 -120.958 2.287 CH0 N2 171.990 1.592 CH0 S2 -164.633 4.863 CH1 M2 -150.721 7.310 CH1 O1 141.713 3.382 CH1 P1 86.219 0.477 CH1 K1 147.738 2.992 CH1 N2 -147.125 1.672 CH1 S2 -136.639 2.776 CH2 M2 25.381 3.013 CH2 O1 -147.700 1.579 CH2 P1 -45.855 0.455 CH2 K1 -120.389 1.439 CH2 N2 6.339 0.844 CH2 S2 26.806 2.199 CH3 M2 71.460 2.330 CH3 O1 -100.326 2.118 CH3 P1 -52.546 1.252 CH3 K1 -76.082 3.139 CH3 N2 61.278 0.761 CH3 S2 74.723 0.560 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 = 278.5 ISOTROPIC 0.29629693 0.51851827 0.29629597 0.22222216 ISOTROPIC 0.39169838 -0.08331787 -0.35837012 0.04998961 ISOTROPIC 0.01441069 0.36087719 -0.15876088 -0.21652700 Hodgkinson et al. (2013) Tidal Calibration KH2013 -1.427 -1.778 -1.91 -0.586 KH2013 0.311 -0.447 -0.864 -0.041 KH2013 -0.143 0.279 -0.877 -0.588 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