B035 grants035bor2006 Latitude 42.503514 Longitude -123.383419 Elevation 370.0 m Install Date 2006-03-19 Contents Of Tar files for year YYYY File Contents B035.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B035.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B035.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B035.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B035.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B035.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B035.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B035.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B035.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B035.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 = 279.1 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 -129.777 113.450 -0.00204 -0.00912 0.000 0.00000 CH1 -29.280 20.243 -0.00181 -0.00220 0.000 0.00000 CH2 5.100 -5.053 -0.00236 0.00100 0.000 0.00000 CH3 -5.830 6.404 -0.00442 -0.00337 0.000 0.00000 Detrend reference date 2006-03-19T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -4.9 CH1 -3.3 CH2 -3.9 CH3 -3.4 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 38.652 24.319 CH0 O1 -51.409 13.609 CH0 P1 -51.811 5.562 CH0 K1 -64.158 16.851 CH0 N2 58.713 6.068 CH0 S2 31.798 5.154 CH1 M2 -97.205 12.447 CH1 O1 45.982 9.911 CH1 P1 48.246 5.162 CH1 K1 48.416 12.078 CH1 N2 -106.077 2.951 CH1 S2 -79.353 5.319 CH2 M2 -2.370 4.699 CH2 O1 148.753 5.659 CH2 P1 106.040 2.433 CH2 K1 128.982 6.077 CH2 N2 -41.991 2.587 CH2 S2 44.294 7.417 CH3 M2 55.560 17.351 CH3 O1 -106.311 8.729 CH3 P1 -102.187 3.510 CH3 K1 -106.047 11.754 CH3 N2 57.314 4.252 CH3 S2 69.018 6.650 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 = 279.1 ISOTROPIC 0.29629660 0.51851812 0.29629623 0.22222238 ISOTROPIC 0.39191439 -0.07574170 -0.36161716 0.04544447 ISOTROPIC 0.00620415 0.36254311 -0.15122112 -0.21752615 Roeloffs 2010 Tidal Calibration Calculated CH0 orientation = 290.7 degrees east of north ER2010 0.88181846 0.89171388 0.73748210 0.02058187 ER2010 0.09315426 -0.06053175 -0.25763738 -0.00290950 ER2010 -0.16762511 0.10098824 -0.20565868 -0.19627371 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 0.949 0.883 0.658 -0.068 KH2013 0.097 -0.056 -0.29 0.008 KH2013 -0.165 0.116 -0.202 -0.192 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