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Metadata Identifier: gov.noaa.ngdc.stp.ionosonde:G00551

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 Photographic Records Showing the Variations of the Virtual Height of Reflection as a Function of the Radio Frequency The standard (analog) ionosonde produces photographic records known as ionograms, which show the variations of the virtual height of reflection as a function of the radio frequency. The frequency band normally used is from about 1 MHz to about 20 MHz though some ionosondes operate down to about 0.20 MHz and up to 30 MHz. The ionograms actually show the time of travel of the pulse signal from the transmitter to the ionosphere and back to the receiver. A given station typically generates a sweep-frequency ionogram in about two minutes. Normally four ionograms are taken per hour, one at each quarter hour. As of May 1994, there are approximately 16,140 rolls of ionogram film at our Data Center. Most of these photographic records (ionograms) were recorded on 35mm film, but there are some 16mm ionogram film. One month of 35mm ionograms averages about 800 feet of film. These rolls of film are kept off site but can be retrieved when needed. If you would like to study specific ionograms, researchers are welcome at the National Geophysical Data Center, but are requested to give adequate advance notice of their visit so that appropriate arrangements may be made for their work space at the Data Center. Some ionograms were digitized and are stored in TIF G4 format.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 NASA/GCMD Data Center Keywords
    1 NASA/GCMD Earth Science Keywords
      1 NASA/GCMD Location Keywords
        1 Photographic Records Showing the Variations of the Virtual Height of Reflection as a Function of the Radio Frequency
        • 1957-01-01
        1 Uncontrolled Keywords
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          CI_Series

          Count Component Name Issue Identification Page
          1 Upper Atmosphere Geophysics (UAG) International Standard Serial Numbers (ISSN) 'ISSN 0579-7144, UAG 93, Ionogram Analysis with Generalized Program Polan.'
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          CI_ResponsibleParty

          Count Component Individual Organization Position Email Role Linkage
          3 No Title Justin Mabie DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Space and Terrestrial Weather Specialist Justin.Mabie@noaa.gov pointOfContact
          1 Justin Mabie 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/ionosonde/
          1 http://www.ngdc.noaa.gov/stp/
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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 1944-03-01
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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 1944-03-01
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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, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
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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

          none found
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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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