B033 vanvlk033bor2007 Latitude 43.2917 Longitude -123.1245 Elevation 312.1 m Install Date 2007-12-13 Contents Of Tar files for year YYYY File Contents B033.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B033.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B033.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B033.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B033.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B033.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B033.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B033.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B033.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B033.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 = 277 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 55.670 -0.000 0.00000 0.01854 0.000 0.00000 CH1 -108.032 -0.000 -0.00000 -0.00597 3234.600 -0.00307 CH2 -74.510 -0.000 -0.00000 -0.00690 204.570 -0.00175 CH3 -118.149 -0.000 -0.00000 -0.01599 316.320 -0.00156 Detrend reference date /detrend_ref Barometric Response Gauge Response(ns/millibar) CH0 -6.8 CH1 -5.7 CH2 -4.8 CH3 -4.9 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 36.452 15.020 CH0 O1 -62.981 7.585 CH0 P1 -71.757 3.491 CH0 K1 -71.524 9.254 CH0 N2 53.929 3.706 CH0 S2 41.507 3.133 CH1 M2 -122.826 7.946 CH1 O1 51.160 4.152 CH1 P1 52.509 1.556 CH1 K1 52.539 5.974 CH1 N2 -123.694 1.784 CH1 S2 -125.311 2.818 CH2 M2 1.385 7.104 CH2 O1 36.989 2.552 CH2 P1 43.214 0.994 CH2 K1 45.240 3.893 CH2 N2 -20.990 1.684 CH2 S2 25.863 4.915 CH3 M2 26.238 19.409 CH3 O1 -45.216 6.184 CH3 P1 -51.879 2.586 CH3 K1 -51.206 6.806 CH3 N2 30.552 4.027 CH3 S2 29.774 7.817 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 = 277 ISOTROPIC 0.29629716 0.51851796 0.29629570 0.22222251 ISOTROPIC 0.39040700 -0.10209055 -0.34957006 0.06125361 ISOTROPIC 0.03489038 0.35602223 -0.17729897 -0.21361365 Hodgkinson et al. (2013) Tidal Calibration KH2013 0.47 1.433 0.749 0.844 KH2013 0.453 0.225 -0.304 -0.013 KH2013 -0.163 0.714 0.096 -0.162 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