NCEI (formerly NGDC)
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Ionograms - Digital

Ionograms are recorded tracings of reflected high frequency radio pulses generated by an ionosonde. Unique relationships exist between the sounding frequency and the ionization densities which can reflect it. As the sounder sweeps from lower to higher frequencies, the signal rises above the noise of commercial radio sources and records the return signal reflected from the different layers of the ionosphere.
Cite this dataset when used as a source.
Online Access
  • Online access is not available for this resource
Distribution Formats Format not available
    Distributor Distributor information not available
    Documentation links not available.
    Date(s)
    • publication: 2012-01-01
    Dataset Progress Status Complete
    Data Update Frequency: Not planned
    Supplemental Information:
    Digital Ionograms
    Purpose: Ionospheric Research
    Originator(s)
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    Publisher(s)
    • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
    Time Period: 1920-01-01 to 2013-01-01
    Spatial Bounding Box Coordinates:
    N: 90.000000
    S: -90.000000
    E: 180.000000
    W: -180.000000
    Spatial Coverage Map:
    Theme keywords
    • Space Physics, Ionosphere, Atmosphere, Indices, Communications, Remote Sensing
    Data Center keywords
    • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    Use Constraints
    • Use Constraints: None
    Access Constraints
    • Access Constraints: No Constraints
    Fees Fee information not available.
    Lineage information for: repository
    Processing Steps
    • 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.
    Last Modified: 2015-09-18
    For questions about the information on this page, please email: Justin.Mabie@noaa.gov