B081 keenwi081bcs2006 Latitude 33.711167 Longitude -116.714167 Elevation 1467 m Install Date 2006-06-16 Contents Of Tar files for year YYYY File Contents B081.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B081.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B081.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B081.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B081.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B081.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B081.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B081.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B081.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B081.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: 0.1 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 = 3.2 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 -19.190 23.647 -0.00125 -0.00229 0.000 0.00000 CH1 -32.660 49.045 -0.00179 -0.00185 0.000 0.00000 CH2 -44.980 60.136 -0.00134 -0.00113 0.000 0.00000 CH3 -24.360 23.032 -0.00182 -0.00770 9.122 0.00031 Detrend reference date 2006-06-16T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -1.8 CH1 -1.9 CH2 -2.0 CH3 -1.5 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 7.074 19.762 CH0 O1 24.563 6.457 CH0 P1 34.205 2.637 CH0 K1 37.597 6.455 CH0 N2 1.115 3.355 CH0 S2 8.886 9.994 CH1 M2 -9.673 14.839 CH1 O1 -26.636 3.526 CH1 P1 -8.956 1.554 CH1 K1 -10.511 4.528 CH1 N2 -3.810 4.053 CH1 S2 -20.159 6.043 CH2 M2 151.830 6.342 CH2 O1 -0.855 3.097 CH2 P1 10.906 0.796 CH2 K1 -5.044 2.409 CH2 N2 159.715 2.057 CH2 S2 165.948 3.313 CH3 M2 48.332 6.149 CH3 O1 17.271 6.016 CH3 P1 25.625 2.044 CH3 K1 22.986 5.088 CH3 N2 120.977 0.838 CH3 S2 43.651 3.216 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 = 3.2 ISOTROPIC 0.29629630 0.51851852 0.29629630 0.22222222 ISOTROPIC -0.38236360 0.14827773 0.32305251 -0.08896664 ISOTROPIC -0.08621614 -0.33939358 0.22197357 0.20363615 Roeloffs 2010 Tidal Calibration Calculated CH0 orientation = 12.1 degrees east of north ER2010 0.46382055 0.82425189 0.46838629 0.39745730 ER2010 -0.32187380 0.26231767 0.62913508 0.16997429 ER2010 0.00359733 -0.46933429 0.24348118 0.32785011 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 0.051 1.415 0.898 0.723 KH2013 -0.394 0.344 0.611 0.319 KH2013 0.03 -0.49 0.265 0.331 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