Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Per Gloersen

Publication_Date: Unknown

Title: Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations

Edition:

Geospatial_Data_Presentation_Form:

Series_Information:

Series_Name:

Issue_Identification:

Publication_Information:

Publication_Place: Boulder, CO U.S.A.

Publisher: National Snow and Ice Data Center (NSIDC)

Other_Citation_Details:

Online_Linkage: http://nsidc.org/data/nsi-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 fourteen 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:

Not Available

Supplemental_Information:

REFERENCE: Carsey, F.D., ed., Microwave remote sensing of sea ice. Geophysical Monograph 68, American Geophysical Union, 1992. Cavalieri, D.J., P. Gloersen and W.J. Campbell, Determination of sea ice parameters with the Nimbus-7 SMMR, J. Geophys. Res. 89(D4):5355-5369, 1984. Comiso, J.C. and H.J. Zwally, Polar microwave brightness temperatures from Nimbus-7 SMMR: Time series of daily and monthly maps from 1978 to 1987. NASA. Reference Publication, 1223, 82 p.,1989. Francis, E.A., Calibration of the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR), 1979-1984, Oregon State University, M.S. thesis, 248 p., 1987. Gloersen, P., In-orbit calibration adjustment of the Nimbus-7 SMMR. NASA Technical Memorandum 100678, 39 p, 1987. Gloersen, P. and D.J. Cavalieri, Reduction of weather effects in the calculation of sea ice concentration from microwave radiances. J. of Geophys. Res. 91(C3):3913-3919, 1986. Gloersen, P., W.J. Campbell, D.J. Cavalieri, J.C. Comiso, C.L. Parkinson and H.J. Zwally. Arctic and Antarctic Sea Ice, 1978-1987: Satellite Passive Microwave Observations. NASA SP-511, 1992. National Snow and Ice Data Center, Nimbus-7 SMMR Polar Radiances and Sea Ice Concentrations on CD-ROM. User's Guide. NSIDC, Special Publication NSIDC SP-3, Boulder, CO, 1994. Nimbus-7 User's Guide. NASA, Goddard Space Flight Center, 263 p., 1978.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19781025

Ending_Date: 19870820

Currentness_Reference:Unknown

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0

East_Bounding_Coordinate: 180.0

North_Bounding_Coordinate: -39.0

South_Bounding_Coordinate: -90.0

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0

East_Bounding_Coordinate: 180.0

North_Bounding_Coordinate: 90.0

South_Bounding_Coordinate: 30.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD PLATFORM

Theme_Keyword_Thesaurus: GCMD INSTRUMENT

Theme_Keyword_Thesaurus: PROJECT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

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 > TERRESTRIAL HYDROSPHERE > SNOW/ICE > ICE EXTENT

Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE EXTENT

Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > MICROWAVE > BRIGHTNESS TEMPERATURE

Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > SEA ICE CONCENTRATION

Theme_Keyword: NIMBUS-7

Theme_Keyword: RADIOMETERS

Theme_Keyword: SMMR > SCANNING MULTICHANNEL MICROWAVE RADIOMETER

Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM

Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM

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

Theme_Keyword: GEOSCIENTIFIC INFORMATION

Theme_Keyword: IMAGERY/BASE MAPS/EARTH COVER

Theme_Keyword: INLAND WATERS

Theme_Keyword: OCEANS

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

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: CONTINENT > NORTH AMERICA > CANADA > HUDSON BAY

Place_Keyword: OCEAN > SOUTHERN OCEAN > AMUNDSEN SEA

Place_Keyword: GEOGRAPHIC REGION > ARCTIC

Place_Keyword: GEOGRAPHIC REGION > POLAR

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: NSIDC USER SERVICES

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: National Snow and Ice Data Center

Address: CIRES, 449 UCB

Address: 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

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NSIDC_DAAC > NSIDC Distributed Active Archive Center

Contact_Person: NSIDC USER SERVICES

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: National Snow and Ice Data Center

Address: CIRES, 449 UCB

Address: 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

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NSIDC > National Snow and Ice Data Center

Contact_Person: NSIDC USER SERVICES

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: National Snow and Ice Data Center

Address: CIRES, 449 UCB

Address: 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: SI-010

Resource_Description: NSIDC-0007

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://nsidc.org/daac/index.html

Access_Instructions:

DATA CENTER URL

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://nsidc.org

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://nsidc.org/data/nsidc-0007.html

Access_Instructions:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://reverb.echo.nasa.gov/reverb/#utf8=%E2%9C%93...

Access_Instructions:

Refine your granule search with ECHO's next generation Earth Science discovery tool (Reverb) using information from this record.

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date:

Metadata_Review_Date: 20120514

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GCMD User Support Office

Contact_Organization: NASA Global Change Master Directory

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Not Available

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: Not Available

Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time