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Metadata Identifier: gov.noaa.ngdc.stp.ionosphere:G10009

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 US-Total Electron Content Product (USTEC) The US Total Electron Content (US-TEC) product is designed to specify TEC over the Continental US (CONUS) in near real-time. The product uses a Kalman Filter data assimilation model, described in the Technical Documentation. This technique is driven by data from ground-based Global Positioning System (GPS) dual frequency receivers. The primary data stream comes from the Maritime and Nationwide Differential GPS (M/NDGPS) real time network of stations operated by the US Coast Guard (USCG). As of January 2006, there were about 130 stations ingested into the model. This number has been gradually increasing and will be augmented by Federal Aviation Administration/Wide Area Augmentation System (FAA/WAAS) data, and new stations in areas with poor coverage. This product has evolved through a collaboration between the Space Weather Prediction Center (SWPC), the National Geodetic Survey (NGS), the National Geophysical Data Center (NGDC), and the Global Systems Division (GSD).
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 NASA/GCMD Earth Science Keywords
    1 US-Total Electron Content Product (USTEC)
    • 2006-04-01
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    CI_Series

    none found
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    CI_ResponsibleParty

    Count Component Individual Organization Position Email Role Linkage
    2 Citation URL http://www.swpc.noaa.gov/ustec/
    1 DOC/NOAA/NWS/NCEP/SWPC > Space Weather Prediction Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce SWPC.CustomerSupport@noaa.gov originator
    3 Rob Redmon DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce ionosphere@noaa.gov pointOfContact
    1 Rob Redmon DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce ionosphere@noaa.gov distributor
    1 United States Air Force sponsor
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    CI_OnlineResource

    Count Component Linkage Name Description Function
    3 http://www.ngdc.noaa.gov/stp/iono/ustec/ US Total Electron Content (Vertical and Slant) Product Archive Home page of USTEC Product Archive at NGDC information
    3 http://www.ngdc.noaa.gov/stp/iono/ustec/products/ Past US-Total Electron Content: Vertical and Slant Data Download past US Tec data download
    2 http://www.swpc.noaa.gov/ustec/ Real-time US-Total Electron Content: Vertical and Slant Vertical and Slant Total Electron Content, TEC uncertainty, Difference from 10-day average indicating recent trends and GPS stations used in calculation during each 15 minute period. information
    2 http://www.swpc.noaa.gov/ustec/all_tec_plots.html Real-time US-Total Electron Content: Vertical and Slant Real-time plots available for download download
    1 http://www.swpc.noaa.gov/ustec/text/
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    MD_Identifier or RS_Identifier

    Count Component Code
    1 GPS > Global Positioning System
    1 Global Positioning System
    1 The TEC and slant path maps can be used to estimate the GPS signal delay due to the ionospheric electron content between a receiver and a GPS satellite
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    EX_Extent

    Bounding Box Temporal Extent
    Count Component Description West East North South Start End
    1 -150 -50 60 10 2004-10-14
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    EX_GeographicBoundingBox

    Count Component West East North South
    1 -150 -50 60 10
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    EX_TemporalExtent

    Count Component Start End
    1 2004-10-14
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    MD_Format

    Count Component Name Version specification
    1 ASCII
    1 PNG Plots
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    MD_Medium

    none found
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    MD_Constraints

    Count Component Use Limitation
    1 None
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    MD_ReferenceSystem

    none found
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    MD_GridSpatialRepresentation

    none found
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    MD_Georeferenceable or MI_Georeferenceable

    none found
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    MD_Georectified or MI_Georectified

    none found
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    MD_Dimension

    none found
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    MD_CoverageDescription or MI_CoverageDescription

    Count Component Attribute Description Content Type
    1
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    MD_Band or MI_Band

    Count Component Identifier Descriptor
    1 Image files (Portable Network Graphics, PNG) 96 Vertical Total Electron Content files, 96 Uncertainty in TEC files, 96 Recent Trend files
    1 Daily Empirical Orthonomal Functions The EOFs define the background conditions at the beginning of each day. Produced once (1) per day.
    1 Coefficients for the EOFs These coefficients will adjust the background conditions in function of the data ingested. Produced every 15 minutes (96 files).
    1 Vertical and Slant Data Values in Total Electron Content Numerical values of the vertical and slant TEC produced every 15 minutes (96 files).
    1 TEC Trend Deviation of the Vertical TEC from the average of the most recent 10 previous days used in the total electron content assimilation. Produced every 15 minutes (96 files).
    1 Uncertainty of the vertical TEC Expected error of the vertical TEC calculated as a function of the state error and the trend of the values. Produced every 15 minutes (96 files).
    1 Stations used in TEC assimilation Data from different sources: CORS (Continuously Operating Reference Stations), GPS-MET (GPS-Meteorological), RTIGS (Real-Time International GNSS Services). Produced every 15 minutes (96 files).
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    MI_RangeElementDescription

    none found
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    MD_AggregateInformation

    none found
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    LE_Source or LI_Source

    none found
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    LE_ProcessStep or LI_ProcessStep

    none found
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    MI_Operation

    Count Component Code Type Status Description
    1 The TEC and slant path maps can be used to estimate the GPS signal delay due to the ionospheric electron content between a receiver and a GPS satellite
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    MI_Platform

    Count Component Code Description
    1 GPS > Global Positioning System The U.S. Air Force of the Department of Defense developed, maintains, and operates the space and control segments of the GPS constellation. Full Operational Capability was declared by NAVSTAR in April 1995.
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    MI_Instrument

    Count Component Code Type Description
    1 Global Positioning System
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