Seismic Network Operations

IU PMSA

Palmer Station, Antarctica

IU PMSA commences operations on: 1993,062

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Host: US National Science Foundation
Latitude: -64.774
Longitude: -64.049
Elevation: 40
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
Station Photo Station Photo Station Photo 

Vault Condition: Seismometer piers are connected directly to bedrock. The floor of the vault is bedrock. The concrete foundation for the walls is poured on bedrock. There is no temperature control nor any heat in the building. The site is noisy during windy conditions.

Site Geology: Primary tonalite

Location CodeChannel CodeInstrumentFlagsSample RateDipAzimuthDepth
20LNZKinemetrics FBA ES-T EpiSensor AccelerometerCG1.00-90.000.000.00
20LN2Kinemetrics FBA ES-T EpiSensor AccelerometerCG1.000.0090.000.00
20LN1Kinemetrics FBA ES-T EpiSensor AccelerometerCG1.000.000.000.00
10VHZStreckeisen STS-2.5CG0.10-90.000.000.00
10VH2Streckeisen STS-2.5CG0.100.0090.000.00
10VH1Streckeisen STS-2.5CG0.100.000.000.00
10LHZStreckeisen STS-2.5CG1.00-90.000.000.00
10LH2Streckeisen STS-2.5CG1.000.0090.000.00
10LH1Streckeisen STS-2.5CG1.000.000.000.00
10BHZStreckeisen STS-2.5CG40.00-90.000.000.00
10BH2Streckeisen STS-2.5CG40.000.0090.000.00
10BH1Streckeisen STS-2.5CG40.000.000.000.00
00VHZStreckeisen STS-1VBB w/E300CG0.10-90.000.000.00
00VH2Streckeisen STS-1VBB w/E300CG0.100.0090.000.00
00VH1Streckeisen STS-1VBB w/E300CG0.100.000.000.00
00LHZStreckeisen STS-1VBB w/E300CG1.00-90.000.000.00
00LH2Streckeisen STS-1VBB w/E300CG1.000.0090.000.00
00LH1Streckeisen STS-1VBB w/E300CG1.000.000.000.00
00BHZStreckeisen STS-1VBB w/E300CG20.00-90.000.000.00
00BH2Streckeisen STS-1VBB w/E300CG20.000.0090.000.00
00BH1Streckeisen STS-1VBB w/E300CG20.000.000.000.00
10VMWStreckeisen STS-2.5CH0.100.000.000.00
10VMVStreckeisen STS-2.5CH0.100.000.000.00
10VMUStreckeisen STS-2.5CH0.100.000.000.00
00VMZStreckeisen STS-1VBB w/E300CH0.100.000.000.00
00VM2Streckeisen STS-1VBB w/E300CH0.100.000.000.00
00VM1Streckeisen STS-1VBB w/E300CH0.100.000.000.00
31LDOCI/PAS pressure sensorCW1.000.000.000.00
30LDOCI/PAS pressure sensorCW1.000.000.000.00
20HNZKinemetrics FBA ES-T EpiSensor AccelerometerTG100.00-90.000.000.00
20HN2Kinemetrics FBA ES-T EpiSensor AccelerometerTG100.000.0090.000.00
20HN1Kinemetrics FBA ES-T EpiSensor AccelerometerTG100.000.000.000.00
10HHZStreckeisen STS-2.5TG100.00-90.000.000.00
10HH2Streckeisen STS-2.5TG100.000.0090.000.00
10HH1Streckeisen STS-2.5TG100.000.000.000.00
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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.

LocChanCal DateEpoch-SpanGradeAmp Nominal Error (dB)Amp Best Fit Error (dB)Phase Nominal Error (degree)Phase Best Fit Error (degree)SensorCal Type
00BH22013:2592012:050 to No Ending TimeA0.0147190.00880180.111840.15249STS1VBBE3Random
00BHZ2014:1562012:050 to No Ending TimeA0.0144080.00890180.116470.12314STS1VBBE3Random
00BHZ2013:2592012:050 to No Ending TimeA0.0295240.014870.349320.13121STS1VBBE3Random
00BH12013:2592012:050 to No Ending TimeA0.0163390.00847790.120870.16376STS1VBBE3Random
10BHZ2012:053 2012:050 to No Ending TA0.0161850.0143770.119450.1569 STS-2.5Random
00BHZ2012:051 2012:050 to No Ending TA0.0142020.00905160.1130.10103 STS1VBBE3Random
00BH22012:051 2012:050 to No Ending TA0.0139310.00885710.109350.12434 STS1VBBE3Random
00BH12012:051 2012:050 to No Ending TA0.0144160.00991310.111640.090702 STS1VBBE3Random
00BH12014:1562012:050 to No Ending TimeA0.0154850.00983570.118480.094778STS1VBBE3Random
00BH22014:1562012:050 to No Ending TimeA0.0141360.0110440.112780.089982STS1VBBE3Random
10BHZ2014:1572012:129 to No Ending TimeA0.0152520.0141580.127550.12709STS-2.5Random
  1. 2012-02-19
    Upgraded to Q330 digitizer.