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Metadata Identifier: gov.noaa.ngdc.stp.ionosphere:G00145

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 Measurement of Incoherent Scatter For radio waves transmitted through the ionosphere with frequencies much larger (50 to 1300MHz) than the plasma frequency (up to 15MHz), very small-scale fluctuations of electron density will scatter a portion of the signal back toward the transmitter. These fluctuations are caused by the random thermal motions of the electrons. The height at which the scattering occurs can be determined by either a pulse technique or by the use of two intersecting cylindrical radar beams. The height resolutions of a backscattered pulse or beam can vary from 4 to 35 km at a height of 100 km to about 300 km at altitudes above 1000 km, depending on the equipment used and the geographical location of the station. From analysis of the backscattered signals, electron density profiles, electron and ion temperature profiles, and ion composition and ionospheric drift can be determined. The equipment used for the observations determines the vertical extent of the backscattered profiles and the resolution, as well as influencing the procedures used to convert the scattered return to measures of meaningful ionospheric parameters. Radar installations that can make these observations are complex and expensive to operate; consequently, these observations are scheduled on an "as needed" basis, and the equipment is shared for other uses. Although the National Geophysical Data Center (NGDC) has several data tapes, each one is an independent experiment with its own parameters and data format. The National Center for Atmospheric Research (NCAR) now archives these data. Their collection includes the NGDC data and newer Incoherent Scatter data that they receive. NCAR has done significant development work on these data sets. They have created a common archive data format and converted all data to this new format. For additional details about this data set, contact one of the people at the address listed below. NCAR HAO, P.O. Box 3000, Boulder, CO 80307-3000, USA. FAX: 303-497-1589. Barbara Emery: 303-497-1596, emery@ncar.ucar.edu. Roy Barnes: 303-497-1230; bozo@ncar.ucar.edu.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 Measurement of Incoherent Scatter
  • 1975-01-01
1 NASA/GCMD Data Center Keywords
    1 NASA/GCMD Earth Science Keywords
      1 NASA/GCMD Location Keywords
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        CI_Series

        none found
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        CI_ResponsibleParty

        Count Component Individual Organization Position Email Role Linkage
        1 Citation URL http://www.ngdc.noaa.gov/stp/iono
        3 Rob Redmon DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce ionosonde@noaa.gov pointOfContact
        1 Rob Redmon DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce ionosonde@noaa.gov distributor
        1 User Services DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce ngdc.info@noaa.gov publisher
        1 User Services DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce ngdc.info@noaa.gov originator
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        CI_OnlineResource

        Count Component Linkage Name Description Function
        1 ftp://ftp.ngdc.noaa.gov/STP/IONOSPHERE/
        1 ftp://ftp.ngdc.noaa.gov/ionosonde Index of STP/Ionosphere ftp characteristics of Ionospheric data download
        1 http://www.ngdc.noaa.gov/stp/iono Ionosonde Data Archived at NGDC Ionosonde Data information
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        MD_Identifier or RS_Identifier

        none found
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        EX_Extent

        Bounding Box Temporal Extent
        Count Component Description West East North South Start End
        1 -180.000000 180.000000 90.000000 -90.000000 1965-11-15 1977-12-15
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        EX_GeographicBoundingBox

        Count Component West East North South
        1 -180.000000 180.000000 90.000000 -90.000000
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        EX_TemporalExtent

        Count Component Start End
        1 1965-11-15 1977-12-15
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        MD_Format

        Count Component Name Version specification
        1 ASCII
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        MD_Medium

        Count Component Name mediumFormat mediumNote
        1 CARTRIDGE TAPE tar
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        MD_Constraints

        Count Component Use Limitation
        1 While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data.
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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

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        MD_CoverageDescription or MI_CoverageDescription

        none found
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        MD_Band or MI_Band

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        MI_RangeElementDescription

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        MD_AggregateInformation

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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

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        MI_Platform

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        MI_Instrument

        none found
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