Seismic Network Operations
IU KIP
Kipapa, Hawaii, USA
IU KIP commences operations on: 1988,228
Host:  Pacific Tsunami Warning Center 

Latitude:  21.42 
Longitude:  158.011 
Elevation:  110 
Datalogger:  Q330 
Broadband:  STS1VBB_w/E300 
Accelerometer:  FBA_EST_EpiSensor_Accelerometer 
Telemetry Status at the NEIC:  Last Data In Less Than 10 Minutes 
Vault Condition: Vault is located at the end of a tunnel used during World War II to store ammuniation. 80 meter tunnel is cut into the side of a canyon on basalt of the Koolau Volcanic Series. The piers are made of concrete, isolated from the concrete floor, and extending approximately 3 feet below floor level and 1.5 feet above. They rest on weathered basalt. Temperature is stable. Dehumidifiers are used to control the humidity. Temperature +20 to +25 degrees Celsius.
Site Geology: The Kipapa tunnel is cut in the side of a canyon of basalt of the Koolau Series (Tertiary). Pier rests on weathered basalt.
Location Code  Channel Code  Instrument  Flags  Sample Rate  Dip  Azimuth  Depth 

00  VHZ  STS1VBB w/E300  CG  0.10  90.00  0.00  33.00 
00  VH2  STS1VBB w/E300  CG  0.10  0.00  90.00  33.00 
00  VH1  STS1VBB w/E300  CG  0.10  0.00  0.00  33.00 
00  LHZ  STS1VBB w/E300  CG  1.00  90.00  0.00  33.00 
00  LH2  STS1VBB w/E300  CG  1.00  0.00  90.00  33.00 
00  LH1  STS1VBB w/E300  CG  1.00  0.00  0.00  33.00 
00  BHZ  STS1VBB w/E300  CG  20.00  90.00  0.00  33.00 
00  BH2  STS1VBB w/E300  CG  20.00  0.00  90.00  33.00 
00  BH1  STS1VBB w/E300  CG  20.00  0.00  0.00  33.00 
10  VHZ  STS2 Standardgain  CG  0.10  90.00  0.00  33.00 
10  VH2  STS2 Standardgain  CG  0.10  0.00  90.00  33.00 
10  VH1  STS2 Standardgain  CG  0.10  0.00  0.00  33.00 
10  LHZ  STS2 Standardgain  CG  1.00  90.00  0.00  33.00 
10  HH2  STS2 Standardgain  TG  100.00  0.00  90.00  33.00 
10  HH1  STS2 Standardgain  TG  100.00  0.00  0.00  33.00 
10  LH2  STS2 Standardgain  CG  1.00  0.00  90.00  33.00 
10  LH1  STS2 Standardgain  CG  1.00  0.00  0.00  33.00 
10  HHZ  STS2 Standardgain  TG  100.00  90.00  0.00  33.00 
10  BHZ  STS2 Standardgain  CG  40.00  90.00  0.00  33.00 
10  BH2  STS2 Standardgain  CG  40.00  0.00  90.00  33.00 
10  BH1  STS2 Standardgain  CG  40.00  0.00  0.00  33.00 
20  LNZ  FBA EST EpiSensor Accelerometer  CG  1.00  90.00  0.00  33.00 
20  LN2  FBA EST EpiSensor Accelerometer  CG  1.00  0.00  90.00  33.00 
20  LN1  FBA EST EpiSensor Accelerometer  CG  1.00  0.00  0.00  33.00 
20  HNZ  FBA EST EpiSensor Accelerometer  TG  100.00  90.00  0.00  33.00 
20  HN2  FBA EST EpiSensor Accelerometer  TG  100.00  0.00  90.00  33.00 
20  HN1  FBA EST EpiSensor Accelerometer  TG  100.00  0.00  0.00  33.00 
30  LDO  CI/PAS pressure sensor  CW  1.00  0.00  0.00  0.00 
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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 

10  BHZ  2011:316  2010:230 to No Ending T  A  0.013327  0.012836  0.073611  0.076494  STS2SG  Random 
00  BHZ  2011:315  2011:306 to No Ending Ti  A  0.017146  0.010241  0.12646  0.18253  STS1VBBE3  Random 
00  BH2  2011:315  2011:306 to No Ending Ti  A  0.020455  0.0090184  0.1306  0.16779  STS1VBBE3  Random 
00  BH1  2011:315  2011:306 to No Ending Ti  A  0.017926  0.0090797  0.12296  0.18618  STS1VBBE3  Random 

20120323STS2 replaced with STS2.5. Vacuum leak fixed on STS1.

20120302The Episensor which had excessively noisy channels was replaced.

20111111Replaced cables to fix lowered long period response problem that had persisted since upgrade.

20100826Upgraded to Q330 digitizer.