Crossover difference data records (XDR) from GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) data from 01 April 1985 to 07 November 1987 (NCEI Accession 9100031)

• Format: Dataset
• Language: unknown
• Published: NOAA NCEI Environmental Data Archive 2016
• Subjects: DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce; DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce; 9100031; ALTIMETER - CROSSOVER DIFFERENCES; ALTIMETER - SEA SURFACE MEASUREMENT; SEA HEIGHT; SEA STATE; SEA SURFACE TOPOGRAPHY; TIDE HEIGHT; TIDE STAGE; WAVE DIRECTION; WAVE HEIGHT; WIND DIRECTION; WIND SPEED; satellite sensor - altimeter; derived products; satellite data; satellite photography; GEOSAT; US DOC; NOAA; NOS - Rockville, MD; Southern Oceans (> 60 degrees South); oceanography; OCEAN > SOUTHERN OCEAN; Southern Ocean
• Online Access: https://search.dataone.org/view/{8B92E778-9A04-406C-A1EC-28F8E8A02031}

Crossover difference data records (XDRs) from the GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) for the time period of April 1, 1985 to November 7, 1987. Parameters include: time, orbit, latitude/longitude, and sea surface height. Corrections to the data include: sea level, wind and wave data, tides, dry and wet troposphere, ionosphere, height bias, altimeter crossover differences, altimeter sea surface measurement, and spacecraft orientation. These data were submitted by the U.S. Navy via National Ocean Service. The US Navy Geosat (Geodetic Satellite) radar altimeter mission lasted for nearly 5 years (March 1985 to January 1990) and collected approximately 750 million measurements of sea level, wave height, and wind speed over the global oceans. During the Geodetic Mission (March 1985 to September 1986), the satellite did not repeat its ground track for the duration of the mission. The orbit of the satellite was changed in early October 1986 to begin the Exact Repeat Mission (ERM) which lasted from November 1986 until the satellite quit functioning in January 1990. During the ERM, the satellite repeated its ground track every 17 days. Data were initially processed by the Johns Hopkins University Applied Physics Laboratory in Laurel, MD in coordination with the NOAA/NOS Satellite Altimeter Group. Data products were transferred to the NOAA National Oceanographic Data Center (NODC) for distribution. Data products are archived at the NODC.