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125 Years of Sound Science, serving society

JRSC - Jasper Ridge Biol. Preserve, Stanford, CA, USA

Station Name JRSC (JRSC)
In Operation 1994/06/30 21:20:00 - Present
Latitude
Longitude:
Elevation: 70.50 meters
Instrumentation Broadband
GPS
Other


  • Site

    Location

    The site is located in the Jasper Ridge Biological Preserve in Stanford, California. It is the replacement installation for the STAN location and is operated cooperatively with Stanford University.

    Network

    BK, BARD (Berkeley Digital Seismic Network and Bay Area Regional Deformation Network)

    Geology

    Serpentine

    Vault/Borehole Conditions

    The vault is located in an east/west adit, 20' in length, constructed for the development of Searsville Dam (circa 1900). The instruments are located in an aluminum pressure tank on a concrete pier. Apporoximately 4 meters of overburden cover the adit. The datalogger and accessory equipment are located in front of the adit.

    GPS Monument Description

    Short brace monument installed in hard rock.
  • Plots & Figures

    Seismic Station Pictures

    Aerial photograph of Jasper Ridge<br>Courtesy of the JRBP

    Aerial photograph of Jasper Ridge
    Courtesy of the JRBP

    Typical STS-2 installation

    Typical STS-2 installation

    GPS Station Timeseries

    Time series processing at the BSL

    Last year Clean Clean & detrended Raw Raw & detrended
    Lifetime Clean Clean & detrended Raw Raw & detrended
    Text file (final results only) Clean Raw

    GPS Station Pictures

  • Instrumentation

    Table of Seismic Instrumentation

    SensorDataloggerSEED ChannelsLocation
    BroadbandStreckeisen STS-2 VBB Tri-Axial SeismometerQ330HR-GFEBH?,HH?,LH?,VH?00
    AccelerometerTSA-100S (4 g max 5 v/g)Q330HR-GFEHN?00
    ReceiverAntennaRadome-
    GPSTopCon Net-G3ATopCon Choke-ringSCIGN Tall-
    SensorDataloggerSEED ChannelsLocation
    OthersElectric Field Dipole (Pb-PbCl or Cu-CuS Anodes)Q330BQ?,LQ?,VQ?10
    BF7Q330BT?,LT?,VT?20
    ElectroMagnetics Inc. BF4 MagnetometerQ330BT?,LT?,VT?20
    AuxiliaryAntennaCurrentQ330VE?10
    ClockPhaseQ330LC?10
    ClockQualityQ330LC?10
    InputVoltageQ330VE?10
    PacketBufferUsageQ330VP?10
    SystemCurrentQ330VE?10
    SystemTemperatureQ330VK?10
    VCOValueQ330VC?10
  • Data & Metadata

    Waveforms and associated metadata, and GPS data, are available at the Northern California Earthquake Data Center (NCEDC).

    Waveform Data



    GPS Data

  • Data Quality

    Noise Analysis

    View more noise plots

    GPS Data Quality


    Completeness

    Data completeness is defined both as "Completeness of observations" and "Cycle slips per observation". "Completeness of Obs." is the number of epochs in the final RINEX file normalized to the expected number. This percentage will go down if time is missing from the RINEX file. "Cycle slips per Obs." is the total number of detected cycle slip normalized to the total number of observations in the RINEX file. This number will increase as the receiver loses lock on satellites more frequently.

    Previous Year
    JRSC completeness last year
    Lifetime
    JRSC completeness lifetime

    Multipath

    The effects of multipath on the data are estimated by parameters for L1 and L2 (MP1 and MP2 respectively); see Estey and Meertens (GPS Solutions, 1999) for derivation. The daily value is the RMS of MP1 and MP2 throughout the day and for all satellites. Higher values indicate a greater prevalence and/or strength of multipathing, i.e. objects on the ground are providing multiple reflection pathways from the satellite to antenna.

    Previous Year
    JRSC multipath last year
    Lifetime
    JRSC multipath lifetime