B003 FloeQuarry Latitude 48.062360 Longitude -124.140860 Elevation 314.00 m Install Date 2005-06-23 Contents Of Tar files for year YYYY File Contents B003.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B003.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B003.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B003.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B003.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B003.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B003.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B003.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B003.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B003.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 = 250.7 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 42.440 -14.700 -0.00152 0.00354 -34.473 -0.01858 CH1 -39.790 17.461 -0.00084 -0.00300 -0.000 -0.00000 CH2 -63.050 23.898 -0.00067 -0.00376 0.000 0.00000 CH3 -46.010 27.773 -0.00310 -0.01356 18.333 0.00023 Detrend reference date 2005-06-23T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -4.4 CH1 -5.2 CH2 -4.2 CH3 -4.2 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -16.422 8.364 CH0 O1 -48.214 4.294 CH0 P1 -58.394 1.640 CH0 K1 -67.179 5.228 CH0 N2 33.314 1.679 CH0 S2 -79.464 3.594 CH1 M2 -78.029 4.722 CH1 O1 -168.892 5.374 CH1 P1 -174.903 2.867 CH1 K1 -172.090 8.879 CH1 N2 -74.394 1.167 CH1 S2 -54.239 1.595 CH2 M2 139.224 13.753 CH2 O1 71.566 5.907 CH2 P1 52.042 3.263 CH2 K1 48.612 10.133 CH2 N2 171.680 2.047 CH2 S2 102.505 6.618 CH3 M2 70.933 6.447 CH3 O1 11.039 6.880 CH3 P1 6.425 3.720 CH3 K1 6.270 10.513 CH3 N2 81.013 1.525 CH3 S2 82.329 1.651 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 = 250.7 ISOTROPIC 0.29630000 0.51850000 0.29630000 0.22220000 ISOTROPIC 0.20940000 -0.34480000 -0.07150000 0.20690000 ISOTROPIC 0.33130000 0.13510000 -0.38540000 -0.08110000 Roeloffs 2010 Tidal Calibration Calculated CH0 orientation = 261.0 degrees east of north ER2010 -0.12996093 3.53285979 -0.79137664 4.12807226 ER2010 0.34481725 -0.58527918 -0.12198399 -0.20838393 ER2010 0.20686873 0.96968926 -0.80270372 0.42133048 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 1.058 2.595 -0.25 3.127 KH2013 0.212 -0.355 -0.17 0.034 KH2013 0.42 1.074 -0.676 0.386 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