B030 pattrs030bor2007 Latitude 43.9713 Longitude -122.7717 Elevation 263.6 m Install Date 2007-10-22 Contents Of Tar files for year YYYY File Contents B030.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B030.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B030.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B030.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B030.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B030.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B030.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B030.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B030.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B030.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 = 220.5 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 -74.960 71.213 -0.00314 -0.06291 36.804 0.00036 CH1 63.160 0.000 0.00000 -0.02033 132.830 -0.00089 CH2 -101.778 58.302 -0.00278 -0.02080 0.000 0.00000 CH3 -334.770 109.750 -0.00505 -0.09190 225.860 0.00019 Detrend reference date 2007-10-22T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -2.9 CH1 -2.5 CH2 -2.8 CH3 -3.1 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 -106.794 12.907 CH0 O1 50.916 10.258 CH0 P1 55.380 4.510 CH0 K1 53.316 14.181 CH0 N2 -103.955 3.431 CH0 S2 -81.840 4.085 CH1 M2 15.182 20.245 CH1 O1 -0.296 7.627 CH1 P1 22.707 2.452 CH1 K1 9.173 9.421 CH1 N2 4.721 4.190 CH1 S2 23.563 11.682 CH2 M2 29.450 20.782 CH2 O1 -44.548 10.094 CH2 P1 -60.833 3.225 CH2 K1 -53.905 11.580 CH2 N2 52.360 4.907 CH2 S2 13.246 4.587 CH3 M2 -2.654 8.149 CH3 O1 -11.963 8.983 CH3 P1 -13.884 2.771 CH3 K1 -15.321 9.657 CH3 N2 55.624 1.564 CH3 S2 -74.443 3.447 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 = 220.5 ISOTROPIC 0.29629697 0.51851821 0.29629589 0.22222227 ISOTROPIC -0.18466045 -0.28783092 0.29979225 0.17269912 ISOTROPIC 0.34573881 -0.23308317 -0.25250527 0.13984964 Hodgkinson et al. (2013) Tidal Calibration KH2013 0.317 0.509 0.336 0.372 KH2013 -0.108 -0.191 0.268 0.247 KH2013 0.375 -0.126 -0.22 0.084 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