B900  blacka900bcn2007 

Latitude  35.686	Longitude  -120.003  Elevation  219.5  m
 
Install Date 2007-08-22 

Contents Of Tar files for year YYYY 
File                              Contents  
B900.YYYY.xml.gauge0.txt.gz       Processed data from gauge 0 (CH0) 
B900.YYYY.xml.gauge1.txt.gz       Processed data from gauge 1 (CH1) 
B900.YYYY.xml.gauge2.txt.gz       Processed data from gauge 2 (CH2) 
B900.YYYY.xml.gauge3.txt.gz       Processed data from gauge 3 (CH3) 
B900.YYYY.xml.Eee+Enn.txt.gz      Processed areal strain, manufacturer's calibration
B900.YYYY.xml.Eee-Enn.txt.gz      Processed differential strain, manufacturer's calibration
B900.YYYY.xml.2Ene.txt.gz         Processed engineering shear strain, manufacturer's calibration
some tars may contain the additional files
B900.YYYY.xml.Eee+Enn.ER2010.txt.gz      Processed areal strain, Roeloffs [2010], calibration
B900.YYYY.xml.Eee-Enn.ER2010.txt.gz      Processed differential strain, Roeloffs [2010], calibration
B900.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 =  221.3  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	   0.000     0.000    0.00000  0.00000    0.000    0.00000
CH1	   0.000     0.000    0.00000  0.00000    0.000    0.00000
CH2	   0.000     0.000    0.00000  0.00000    0.000    0.00000
CH3	   0.000     0.000    0.00000  0.00000    0.000    0.00000
Detrend reference date /detrend_ref 
 
Barometric Response
Gauge	Response(ns/millibar) 
CH0	0.0
CH1	0.0
CH2	0.0
CH3	0.0
  
Tidal Constituents
Gauge	Tide	Phase   Amp(ns)
CH0 M2   0.0 0.0
CH0 O1   0.0 0.0
CH0 K1   0.0 0.0
CH0 N2   0.0 0.0
CH0 S2   0.0 0.0
CH1 M2   0.0 0.0
CH1 O1   0.0 0.0
CH1 K1   0.0 0.0
CH1 N2   0.0 0.0
CH1 S2   0.0 0.0
CH2 M2   0.0 0.0
CH2 O1   0.0 0.0
CH2 K1   0.0 0.0
CH2 N2   0.0 0.0
CH2 S2   0.0 0.0
CH3 M2   0.0 0.0
CH3 O1   0.0 0.0
CH3 K1   0.0 0.0
CH3 N2   0.0 0.0
CH3 S2   0.0 0.0
 
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 =  221.3
ISOTROPIC    0.29629691    0.51851805    0.29629607    0.22222231
ISOTROPIC   -0.17493521   -0.29422616    0.29262495    0.17653643
ISOTROPIC    0.35076044   -0.22495561   -0.26077789    0.13497307
 
 
 
Mon Aug 28 12:49:13 MDT 2017