gov.noaa.ngdc.stp.ionosonde:3088 eng; USA utf8 dataset Justin Mabie DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Space and Terrestrial Weather Specialist (303) 497-6135 (303) 497-6513 325 Broadway, Mail Code E/GC4 Boulder CO 80305-3328 USA Justin.Mabie@noaa.gov pointOfContact 2015-09-18 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Ionograms - Analog 2012-01-01 publication NOAA National Centers for Environmental Information publisher DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator 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. Ionospheric Research completed notPlanned Space Physics, Ionosphere, Atmosphere, Indices, Communications, Remote Sensing theme NASA/GCMD Earth Science 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 dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information custodian otherRestrictions Use Constraints: None otherRestrictions Access Constraints: No Constraints eng; USA climatologyMeteorologyAtmosphere -180.000000 180.000000 -90.000000 90.000000 1920-01-01 2012-01-01 Analog Ionograms repository NOAA National Centers for Environmental Information 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. 2015-04-22T00:00:00 annually This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-08-08 version of the FGDC RSE to ISO 19115-2 transform. Translated from FGDC 2012-10-10T11:08:30.3-06:00 This record was automatically modified on 2015-09-18 to include references to NCEI where applicable. NOAA National Centers for Environmental Information Metadata Specialist editor Justin Mabie DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Space and Terrestrial Weather Specialist (303) 497-6135 (303) 497-6513 325 Broadway, Mail Code E/GC4 Boulder CO 80305-3328 USA Justin.Mabie@noaa.gov pointOfContact