B005 ShoresNW1BWA2005 Latitude 48.059549 Longitude -123.503278 Elevation 302.7 m Install Date 2005-07-19 Contents Of Tar files for year YYYY File Contents B005.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B005.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B005.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B005.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B005.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B005.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B005.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B005.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B005.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B005.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 = 319.7 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 -15.830 0.000 0.00000 -0.00293 11.364 -0.00132 CH1 -3.110 0.000 0.00000 0.00337 3.546 -0.00351 CH2 -4.620 0.000 0.00000 0.00030 4.973 -0.00157 CH3 -27.180 0.000 0.00000 -0.00381 27.250 -0.00183 Detrend reference date 2005-07-19T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -3.5 CH1 -4.9 CH2 -8.5 CH3 -3.4 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 95.342 9.726 CH0 O1 12.064 4.215 CH0 P1 15.442 2.660 CH0 K1 19.018 6.907 CH0 N2 73.423 0.741 CH0 S2 72.032 7.316 CH1 M2 31.416 8.267 CH1 O1 4.356 4.697 CH1 P1 -5.958 2.588 CH1 K1 -6.526 7.316 CH1 N2 66.213 2.079 CH1 S2 -43.347 1.452 CH2 M2 -99.131 17.866 CH2 O1 -161.737 7.600 CH2 P1 -167.442 4.418 CH2 K1 -169.281 14.682 CH2 N2 -91.437 3.931 CH2 S2 -94.708 5.981 CH3 M2 -115.592 6.894 CH3 O1 -159.875 2.422 CH3 P1 173.236 1.869 CH3 K1 171.779 6.830 CH3 N2 -86.223 2.885 CH3 S2 39.008 2.830 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 = 319.7 ISOTROPIC 0.29629666 0.51851840 0.29629617 0.22222211 ISOTROPIC 0.06608878 0.34668779 -0.20476328 -0.20801329 ISOTROPIC -0.38635138 0.13031477 0.33422488 -0.07818826 Roeloffs 2010 Tidal Calibration Calculated CH0 orientation = 335.4 degrees east of north ER2010 1.45890477 3.78374857 1.65273925 1.31271038 ER2010 -0.47602079 0.36879633 -0.50316039 -0.58461064 ER2010 0.26286584 1.28213994 1.15310253 0.65817422 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. Fri Aug 11 17:31:15 MDT 2017