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: | STS-1VBB_w/E300 |
| Accelerometer: | FBA_ES-T_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 |
|---|---|---|---|---|---|---|---|
| 20 | LNZ | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | -90.00 | 0.00 | 33.00 |
| 20 | HNZ | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | -90.00 | 0.00 | 33.00 |
| 10 | VHZ | STS-2 Standard-gain | CG | 0.10 | -90.00 | 0.00 | 33.00 |
| 10 | LHZ | STS-2 Standard-gain | CG | 1.00 | -90.00 | 0.00 | 33.00 |
| 10 | HHZ | STS-2 Standard-gain | TG | 100.00 | -90.00 | 0.00 | 33.00 |
| 10 | BHZ | STS-2 Standard-gain | CG | 40.00 | -90.00 | 0.00 | 33.00 |
| 00 | VHZ | STS-1VBB w/E300 | CG | 0.10 | -90.00 | 0.00 | 33.00 |
| 00 | LHZ | STS-1VBB w/E300 | CG | 1.00 | -90.00 | 0.00 | 33.00 |
| 00 | BHZ | STS-1VBB w/E300 | CG | 20.00 | -90.00 | 0.00 | 33.00 |
| 30 | LDO | CI/PAS pressure sensor | CW | 1.00 | 0.00 | 0.00 | 0.00 |
| 20 | LN2 | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | 0.00 | 90.00 | 33.00 |
| 20 | LN1 | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | 0.00 | 0.00 | 33.00 |
| 20 | HN2 | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | 0.00 | 90.00 | 33.00 |
| 20 | HN1 | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | 0.00 | 0.00 | 33.00 |
| 10 | VH2 | STS-2 Standard-gain | CG | 0.10 | 0.00 | 90.00 | 33.00 |
| 10 | VH1 | STS-2 Standard-gain | CG | 0.10 | 0.00 | 0.00 | 33.00 |
| 10 | HH2 | STS-2 Standard-gain | TG | 100.00 | 0.00 | 90.00 | 33.00 |
| 10 | HH1 | STS-2 Standard-gain | TG | 100.00 | 0.00 | 0.00 | 33.00 |
| 10 | LH2 | STS-2 Standard-gain | CG | 1.00 | 0.00 | 90.00 | 33.00 |
| 10 | LH1 | STS-2 Standard-gain | CG | 1.00 | 0.00 | 0.00 | 33.00 |
| 10 | BH2 | STS-2 Standard-gain | CG | 40.00 | 0.00 | 90.00 | 33.00 |
| 10 | BH1 | STS-2 Standard-gain | CG | 40.00 | 0.00 | 0.00 | 33.00 |
| 00 | VH2 | STS-1VBB w/E300 | CG | 0.10 | 0.00 | 90.00 | 33.00 |
| 00 | VH1 | STS-1VBB w/E300 | CG | 0.10 | 0.00 | 0.00 | 33.00 |
| 00 | LH2 | STS-1VBB w/E300 | CG | 1.00 | 0.00 | 90.00 | 33.00 |
| 00 | LH1 | STS-1VBB w/E300 | CG | 1.00 | 0.00 | 0.00 | 33.00 |
| 00 | BH2 | STS-1VBB w/E300 | CG | 20.00 | 0.00 | 90.00 | 33.00 |
| 00 | BH1 | STS-1VBB w/E300 | CG | 20.00 | 0.00 | 0.00 | 33.00 |
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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 three-step method to estimate instrument response parameters (poles, zeros, sensitivity and gain) and their associated errors using random calibration signals. First, we solve a coarse non-linear 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 local-minimum solution) caused by noise in the calibration records and enhances algorithm convergence. Second, we iteratively solve a non-linear parameter estimation problem to obtain the least squares best-fit 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 2/3rds-octave band centered at each best-fit pole/zero frequency. This procedure yields error estimates of the 99% confidence interval.
| Loc | Chan | Cal Date | Epoch-Span | 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 | STS-2-SG | 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 |
-
2012-03-23STS-2 replaced with STS-2.5. Vacuum leak fixed on STS-1.
-
2012-03-02The Episensor which had excessively noisy channels was replaced.
-
2011-11-11Replaced cables to fix lowered long period response problem that had persisted since upgrade.
-
2010-08-26Upgraded to Q330 digitizer.
- NOAA Pacific Tsunami Warning Center
- "Institut de Physique du Globe de Paris (IPGP), France"
- USGS GSN Program
- National Science Foundation
- Incorporated Research Institutions in Seismology
- NOAA Pacific Tsunami Warning Center
- "Institut de Physique du Globe de Paris (IPGP), France"
- USGS GSN Program
- National Science Foundation
- Incorporated Research Institutions in Seismology
