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Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations

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Identification Information:

Dataset Identifier:

NSIDC-0007

Citation:

Citation Information:

Originator: Gloersen, P.
Publication Date: 20060803
Title: Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/nsidc-0007.html

Description:

Abstract:

This data set contains gridded brightness temperatures and sea ice concentrations for both polar regions. It spans the period from October 1978 through August 1987, when the Nimbus-7 SMMR scanner was turned off. The data were collected every other day at 6.60, 10.69, 18.00, 21.00 and 37.00 GHz. Due to spacecraft power limitations, the scanner operated only on alternate days. There are usually at least foutreen days of coverage per month, although major data gaps occurred during the month of August. In August 1982, the following days are missing for both polar regions: 4th, 8th, and 16th; in August 1984, the 13th through the 23rd are missing for both polar regions; and in August 1985, the 6th through 8th are missing for the Southern Hemisphere.

Brightness temperature and sea ice concentration grids have 25 x 25 km grid elements in polar stereographic projection. Volume 7 contains all SMMR sea ice concentrations for both polar regions, plus five months of brightness temperature grids for the North polar region.

Brightness temperature grids are stored as 16-bit integers, one day of brightness temperature data is 0.27 mbytes for the North polar region, 0.21 mbytes for the South. Ice grids are stored as 8-bit integers. Files contain 136192 bytes and 104912 bytes for the North and South respectively. The NASA Team Algorithm (Cavalieri et al. 1984, Gloersen and Cavalieri 1986) was used to calculate ice concentrations from the brightness temperatures. The data were produced by Dr. P. Gloersen, NASA/GSFC, Oceans and Ice Branch, and are available via FTP.

Notice to Data Users: SMMR TCT tapes comprised the input data set, unlike the SMMR Digital Media product distributed by NSIDC in 1979.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: Gloersen, P.
Publication Date: 20060803
Title: Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/daac/nsidc0007_smmr_tbs_seaice.gd.html

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 19781025
Ending Date: 19870820

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: -180°
East Bounding Coordinate: 180°
North Bounding Coordinate: 90°
South Bounding Coordinate: -90°

Keywords:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
Theme Keyword: EARTH SCIENCE Cryosphere Sea Ice Ice Extent
Theme Keyword: EARTH SCIENCE Cryosphere Sea Ice Sea Ice Concentration
Theme Keyword: EARTH SCIENCE Cryosphere Snow/Ice Ice Extent
Theme Keyword: EARTH SCIENCE Oceans Sea Ice Ice Extent
Theme Keyword: EARTH SCIENCE Oceans Sea Ice Sea Ice Concentration
Theme Keyword: EARTH SCIENCE Spectral/Engineering Microwave Brightness Temperature
Theme Keyword: EARTH SCIENCE Terrestrial Hydrosphere Snow/Ice Ice Extent

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Project Keywords
Theme Keyword: EOSDIS Earth Observing System Data Information System
Theme Keyword: ESIP Earth Science Information Partners Program

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
Theme Keyword: RADIOMETERS
Theme Keyword: SMMR Scanning Multichannel Microwave Radiometer

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
Theme Keyword: NIMBUS-7

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Antarctic
Theme Keyword: Arctic
Theme Keyword: CD-ROM
Theme Keyword: DAAC
Theme Keyword: EOSDIS
Theme Keyword: Global Change
Theme Keyword: Ice
Theme Keyword: NSIDC DAAC
Theme Keyword: Passive Microwave
Theme Keyword: Polar
Theme Keyword: Radiance
Theme Keyword: Remote Sensing
Theme Keyword: Sea Ice Concentration
Theme Keyword: Sea Ice Extent
Theme Keyword: Snow

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Continent North America Canada Hudson Bay
Place Keyword: Geographic Region Polar
Place Keyword: Ocean Arctic Ocean Baffin Bay
Place Keyword: Ocean Arctic Ocean Beaufort Sea
Place Keyword: Ocean Arctic Ocean Chukchi Sea
Place Keyword: Ocean Atlantic Ocean North Atlantic Ocean
Place Keyword: Ocean Atlantic Ocean North Atlantic Ocean Greenland Sea
Place Keyword: Ocean Pacific Ocean North Pacific Ocean Bering Sea
Place Keyword: Ocean Southern Ocean Amundsen Sea

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199 x
Contact Facsimile Telephone: 1 303 492-2468 x
Contact Electronic Mail Address: nsidc@nsidc.org

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Distribution Information:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: National Snow and Ice Data Center
Contact Person: NSIDC User Services

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Resource Description:

NSIDC-0007

Distribution Liability:

NSIDC 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. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

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Metadata Reference Information:

Metadata Date:

20130826

Metadata Review Date:

20130826

Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Metadata Standard Name:

FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata

Metadata Standard Version:

FGDC-STD-012-2002

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Metadata Views

FGDC Text-Only

Federal Geographic Data Committee (FGDC) in plain text

FGDC XML

Federal Geographic Data Committee (FGDC) in Extensible Markup Language (XML)

DIF HTML

NASA Global Change Master Directory (GCMD) Directory Interchange Format (DIF)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata