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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 NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) 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 NCEI 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 GCMD Data Center Keywords NASA/GCMD Data Center Keywords
    2015-03-01
    1995-04-24
1 NASA/GCMD Earth Science Keywords
    1 NASA/GCMD Location Keywords
      1 GCMD Project Keywords NASA/GCMD Project Keywords
        2015-03-01
        1995-04-24
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      CI_Series

      none found
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      CI_ResponsibleParty

      Count Component Individual Organization Position Email Role Linkage
      3 http://www.ngdc.noaa.gov/stp/iono
      1 Anna Milan Anna Milan DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Metadata Specialist Anna.Milan@noaa.gov pointOfContact
      1 NCEI (publisher) DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher
      1 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher
      1 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator
      2 GCMD User Support Office NASA GCMD User Support Office gcmduso@gcmd.gsfc.nasa.gov publisher http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso
      4 Rob Redmon Redmon, Robert DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, Department of Commerce ionosonde@noaa.gov pointOfContact
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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
      2 http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso GCMD Feedback Form Have a Comment for the GCMD? information
      2 http://gcmd.nasa.gov/learn/keyword_list.html GCMD's Science Keywords and Associated Directory Keywords This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions. information
      1 http://www.ngdc.noaa.gov/stp/iono Ionosphere Program at NCEI The Ionospheric Physics Group of NCEI operates the Ionosphere portion of the World Data Center for Solar-Terrestrial Physics, Boulder, which seeks out and archives data, data products, and information related to the Ionosphere. 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

      none found
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      MD_CoverageDescription or MI_CoverageDescription

      none found
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      MD_Band or MI_Band

      none found
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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

      Count Component DateTime Description
      1 2015-04-22T00:00:00 NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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      MI_Operation

      none found
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      MI_Platform

      none found
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      MI_Instrument

      none found
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