Seismic Network Operations
IU BBSR
Bermuda Institute of Ocean Sciences, St George's Bermuda
IU BBSR commences operations on: 2002,191
Host:  Bermuda Institute of Ocean Sciences 

Latitude:  32.371 
Longitude:  64.696 
Elevation:  30 
Datalogger:  Q330 
Broadband:  CMG3TB 
Accelerometer:  FBA_EST_EpiSensor_Accelerometer 
Telemetry Status at the NEIC:  Last Data In Less Than 10 Minutes 
Location Code  Channel Code  Instrument  Flags  Sample Rate  Dip  Azimuth  Depth 

20  LNZ  Kinemetrics FBA EST EpiSensor Accelerometer  CG  1.00  90.00  0.00  0.00 
20  LN2  Kinemetrics FBA EST EpiSensor Accelerometer  CG  1.00  0.00  90.00  0.00 
20  LN1  Kinemetrics FBA EST EpiSensor Accelerometer  CG  1.00  0.00  0.00  0.00 
10  VHZ  Streckeisen STS2 Highgain  CG  0.10  90.00  0.00  0.00 
10  VH2  Streckeisen STS2 Highgain  CG  0.10  0.00  90.00  0.00 
10  VH1  Streckeisen STS2 Highgain  CG  0.10  0.00  0.00  0.00 
10  LHZ  Streckeisen STS2 Highgain  CG  1.00  90.00  0.00  0.00 
10  LH2  Streckeisen STS2 Highgain  CG  1.00  0.00  90.00  0.00 
10  LH1  Streckeisen STS2 Highgain  CG  1.00  0.00  0.00  0.00 
10  BHZ  Streckeisen STS2 Highgain  CG  40.00  90.00  0.00  0.00 
10  BH2  Streckeisen STS2 Highgain  CG  40.00  0.00  90.00  0.00 
10  BH1  Streckeisen STS2 Highgain  CG  40.00  0.00  0.00  0.00 
00  VHZ  T120 post hole, quiet  CG  0.10  90.00  0.00  31.40 
00  VH2  T120 post hole, quiet  CG  0.10  0.00  130.00  31.40 
00  VH1  T120 post hole, quiet  CG  0.10  0.00  40.00  31.40 
00  LHZ  T120 post hole, quiet  CG  1.00  90.00  0.00  31.40 
00  LH2  T120 post hole, quiet  CG  1.00  0.00  130.00  31.40 
00  LH1  T120 post hole, quiet  CG  1.00  0.00  40.00  31.40 
00  BHZ  T120 post hole, quiet  CG  40.00  90.00  0.00  31.40 
00  BH2  T120 post hole, quiet  CG  40.00  0.00  130.00  31.40 
00  BH1  T120 post hole, quiet  CG  40.00  0.00  40.00  31.40 
10  VMW  Streckeisen STS2 Highgain  CH  0.10  0.00  0.00  0.00 
10  VMV  Streckeisen STS2 Highgain  CH  0.10  0.00  0.00  0.00 
10  VMU  Streckeisen STS2 Highgain  CH  0.10  0.00  0.00  0.00 
00  VMZ  T120 post hole, quiet  CH  0.10  0.00  0.00  31.00 
00  VM2  T120 post hole, quiet  CH  0.10  0.00  0.00  31.00 
00  VM1  T120 post hole, quiet  CH  0.10  0.00  0.00  31.00 
30  LDO  IU Paroscientific Microbarograph  CW  1.00  0.00  0.00  0.00 
20  HNZ  Kinemetrics FBA EST EpiSensor Accelerometer  TG  100.00  90.00  0.00  0.00 
20  HN2  Kinemetrics FBA EST EpiSensor Accelerometer  TG  100.00  0.00  90.00  0.00 
20  HN1  Kinemetrics FBA EST EpiSensor Accelerometer  TG  100.00  0.00  0.00  0.00 
00  HHZ  T120 post hole, quiet  TG  100.00  90.00  0.00  31.40 
00  HH2  T120 post hole, quiet  TG  100.00  0.00  130.00  31.40 
00  HH1  T120 post hole, quiet  TG  100.00  0.00  40.00  31.40 
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As part of the annual calibration process, the USGS runs a sequence that includes a random, a step, and several sine wave calibrations. The USGS analyzes the random binary calibration signal in order to estimate the instrument response. The figures below show the results from the analysis of the most recent processed calibration at the station.
We use an iterative threestep method to estimate instrument response parameters (poles, zeros, sensitivity and gain) and their associated errors using random calibration signals. First, we solve a coarse nonlinear inverse problem using a least squares grid search to yield a first approximation to the solution. This approach reduces the likelihood of poorly estimated parameters (a localminimum solution) caused by noise in the calibration records and enhances algorithm convergence. Second, we iteratively solve a nonlinear parameter estimation problem to obtain the least squares bestfit Laplace pole/zero/gain model. Third, by applying the central limit theorem we estimate the errors in this pole/zero model by solving the inverse problem at each frequency in a 2/3rdsoctave band centered at each bestfit pole/zero frequency. This procedure yields error estimates of the 99% confidence interval.
Loc  Chan  Cal Date  EpochSpan  Grade  Amp Nominal Error (dB)  Amp Best Fit Error (dB)  Phase Nominal Error (degree)  Phase Best Fit Error (degree)  Sensor  Cal Type 

00  BHZ  2014:066  2013:234 to 2014,068,18  A  0.014989  0.014287  0.097182  0.080965  T120PHQ  Random 
10  BHZ  2014:067  2011:263 to No Ending Time  A  0.015306  0.01458  0.13289  0.091024  STS2HG  Random 

20130822CMG3TB replaced with Trillium120PHQ.

20120816The CMG3TB was showing persistent LP pulsing and then completely failed.

20080801Upgraded to Q330 digitizer.