B935 dinsmr935bcn2008 Latitude 40.4787 Longitude -123.5732 Elevation 696.7 m Install Date 2008-10-28 Contents Of Tar files for year YYYY File Contents B935.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B935.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B935.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B935.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B935.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B935.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B935.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B935.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B935.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B935.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 = 0 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 -399.040 188.670 -0.00127 0.01323 219.000 0.00000 CH1 -118.828 131.470 -0.00186 -0.01789 0.000 0.00000 CH2 22.010 -0.000 -0.00000 -0.11965 0.000 -0.00000 CH3 25.730 0.000 -0.00000 -0.10918 -0.000 0.00000 Detrend reference date /detrend_ref Barometric Response Gauge Response(ns/millibar) CH0 -4.4 CH1 -5.3 CH2 -5.8 CH3 -3.7 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -17.147 4.910 CH0 O1 3.718 6.959 CH0 P1 0.427 2.585 CH0 K1 5.678 7.583 CH0 N2 -3.441 0.592 CH0 S2 -28.963 2.280 CH1 M2 -39.052 7.231 CH1 O1 54.503 4.297 CH1 P1 55.848 1.752 CH1 K1 59.544 6.030 CH1 N2 -53.371 1.998 CH1 S2 -6.357 3.921 CH2 M2 44.666 11.000 CH2 O1 -81.526 5.099 CH2 P1 -85.133 2.582 CH2 K1 -86.072 6.826 CH2 N2 55.891 2.627 CH2 S2 56.762 3.281 CH3 M2 48.276 4.523 CH3 O1 -54.181 3.848 CH3 P1 -52.299 2.063 CH3 K1 -68.997 4.610 CH3 N2 70.099 1.304 CH3 S2 164.407 0.300 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 = 0 ISOTROPIC 0.29629719 0.51851776 0.29629596 0.22222242 ISOTROPIC 0.32907423 -0.25635070 -0.22653395 0.15381042 ISOTROPIC 0.21294429 0.26731717 -0.31987045 -0.16039100 Hodgkinson et al. (2013) Tidal Calibration KH2013 0.921 1.1 1.027 0.357 KH2013 0.395 -0.498 -0.275 0.253 KH2013 0.329 -0.204 -0.903 -0.093 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