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Crossover difference data records (XDR) from GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) data from 1985-03-31 to 1989-12-31 (NCEI Accession 9000068)

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Crossover difference data records (XDRs) from the GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) for the time period of March 31, 1985 to December 31, 1989. 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 Oceanic 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 (1986 to 1987), 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 8, 1988 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.
  • Cite as: Doyle, Nancy S.; US Navy > Office of Naval Research (2022). Crossover difference data records (XDR) from GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) data from 1985-03-31 to 1989-12-31 (NCEI Accession 9000068). [indicate subset used]. NOAA National Centers for Environmental Information. Unpublished Dataset. https://www.ncei.noaa.gov/archive/accession/9000068. Accessed [date].
gov.noaa.nodc:9000068
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Distribution Formats
  • Originator data format
Ordering Instructions When requesting analog data from NCEI, the desired dataset should be referred to by the Accession Number listed in this metadata record. Because the contents of this archival information package are analog, you must contact NCEI for assistance in obtaining a copy of these data.
Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 1985-03-31 to 1989-12-31
Spatial Bounding Box Coordinates
West: -180
East: 180
South: -72
North: 72
Spatial Coverage Map
General Documentation
Associated Resources
  • Data Records derived from GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) data from 30 March 1985 to 31 December 1989
    • NCEI Collection
      Navigate directly to the URL for data access and direct download.
    • Parent ID (indicates this dataset is related to other data):
    • gov.noaa.nodc:GEOSAT-GM-ERM
Publication Dates
  • publication: 2022-01-12
Data Presentation Form Hardcopy document - document archived in analog format
Dataset Progress Status Pending - committed to, but not yet addressed
Data Update Frequency As needed
Supplemental Information
Note: Global Crossover Difference Data derived from sea level observations collected during the first phase of operations of the U.S. Navy Geodetic Satellite (GEOSAT).

The set of two tapes (NODC working tape #s D03236, and D03237, NODC reference number L00950) contain Crossover Difference records (XDRs) from the Northeast Atlantic region. Additional Geosat data from other ocean regions is filed under NCEI accession # 9000068, NODC reference #s L00950-L00959.

Data for each region are held on two magnetic tapes per region, with each set of two tapes filed under a single reference number. More Geosat Crossover Data archived at NODC is filed under:
Accession # Reference # Region(s)
9000190 L00960-L00961 N Atlantic, Indian Ocean
9000199 L01017 Indian Ocean
9000213 L01018 Indian Ocean, SE Pacific
9100031 L01183 Georgia, Antarctica
9100053 L01184 Fuego Antarctica

The set of two tapes (NODC working tape #s D03238, and D03239, NODC reference number L00951) contain Crossover Difference records (XDRs) from the Southwest Pacific region.

The set of two tapes (NODC working tape #s D03240, and D03241, NODC reference number L00952) contain Crossover Difference records (XDRs) from the Southest Pacific region.

The set of two tapes (NODC working tape #s D03242, and D03243, NODC reference number L00953) contain Crossover Difference records (XDRs) from the Indian Ocean region.

The set of two tapes (NODC working tape #s D03244, and D03245, NODC reference number L00954) contain Crossover Difference records (XDRs) from the Indian Ocean and South Atlantic regions.

The set of two tapes (NODC working tape #s D03246, and D03247, NODC reference number L00955) contain Crossover Difference records (XDRs) from The North Pacific.

The set of two tapes (NODC working tape #s D03248, and D03249, NODC reference number L00956) contain Crossover Difference records (XDRs) from The Indian Ocean.

The set of two tapes (NODC working tape #s D03250, and D03251, NODC reference number L00957) contain Crossover Difference records (XDRs) from the North Atlantic.

The set of two tapes (NODC working tape #s D03252, and D03253, NODC reference number L00958) contain Crossover Difference records (XDRs) from the Northeast Pacific.

The set of two tapes (NODC working tape #s D03254, and D03255, NODC reference number L00959) contain Crossover Difference records (XDRs) from the North Pacific.

All tapes are a part of a set of Geosat tapes submitted by Ms. Nancy Doyle of NOAA/NOS, Rockville, MD.

TWENTY TAPES OF GEOSAT SEQUENTIAL CROSSOVER DATA

Note: Metadata for this accession were extracted from a legacy database maintained by the U.S. National Oceanographic Data Center (NODC). The design of the database did not exactly reflect the FGDC Content Standard for Digital Geospatial Metadata (CSDGM).

Principal Investigator (PI) and organization contact information accurately represents all available information from the legacy database at the time that this description was created. However, proper attribution of a PI to a specific institution or the role (submitting or collecting) taken by an institution may not be correct due to inexact mapping between fields in the legacy database and the CSDGM. Due to this uncertainty, the contact information was initially recorded in the Supplemental Information element of the CSDGM description.

To develop more accurate metadata, NCEI reviews metadata for all accessions on an ongoing basis.

Points of contact for this dataset include:
Contact info:
Agency: US NAVY; SCIENTIFIC
PI: Doyle, Ms. Nancy
Address:
address: 800 N QUINCY STREET
city: ARLINGTON
state: VA
postal: 22203-1906
country: UNITED STATES
Contact info:
Agency: US DOC; NOAA; NATIONAL OCEAN SERVICE - ROCKVILLE
PI: 98
Address:
address: 6001 EXECUTIVE BLVD.
city: ROCKVILLE
state: MD
postal: NOT AVAILABLE
country: UNITED STATES
Contact info:
Agency: US DOC; NOAA; NATIONAL MARINE FISHERIES SERVICE - CHARLESTON
PI: 98
Address:
address: 217 FORT JOHNSON ROAD
city: CHARLESTON
state: SC
postal: 29412
country: UNITED STATES
Purpose This dataset is available to the public for a wide variety of uses including scientific research and analysis.
Use Limitations
  • Data in this archival information package are not currently available for public download from NCEI. Please contact NCEI directly for access to these data.
  • accessLevel: Public
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: Doyle, Nancy S.; US Navy > Office of Naval Research (2022). Crossover difference data records (XDR) from GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) data from 1985-03-31 to 1989-12-31 (NCEI Accession 9000068). [indicate subset used]. NOAA National Centers for Environmental Information. Unpublished Dataset. https://www.ncei.noaa.gov/archive/accession/9000068. Accessed [date].
Cited Authors
Contributors
Resource Providers
Publishers
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Doyle, Nancy S.; US Navy > Office of Naval Research (2022). Crossover difference data records (XDR) from GEOSAT Geodetic Mission (GM) and Exact Repeat Mission (ERM) data from 1985-03-31 to 1989-12-31 (NCEI Accession 9000068). [indicate subset used]. NOAA National Centers for Environmental Information. Unpublished Dataset. https://www.ncei.noaa.gov/archive/accession/9000068. Accessed [date].
Access Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Acquisition Information (collection)
Instrument
  • satellite sensor - altimeter
Platform
  • GEOSAT
Last Modified: 2024-03-02T15:22:34Z
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