Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations  View Catalog Page Entry ID
NSIDC-0007
Summary
NSIDC produces gridded brightness temperatures (TBs) on polar stereographic grids for north and south polar regions from orbital (swath) data collected by the Scanning Multichannel Microwave Radiometer (SMMR) flown aboard the Nimbus-7 satellite. This data set contains gridded brightness temperatures (TB) and sea ice concentrations, spanning October 1978 through August 1987, when the SMMR scanner was turned off. Brightness temperature and sea ice concentration grids have 25 x 25 km grid elements. The data were collected every other day at 6.60, 10.69, 18.00, 21.00 and 37.00 GHz. (The scanner operated only on alternate days, due to spacecraft power limitations).
There are usually at least 14 days of coverage per month, although major data gaps occur in 1982, August 4th, 8th, and 16th are missing for both polar regions; in 1984, August 13th through the 23rd are missing for both polar regions. Volume 7 contains all SMMR sea ice concentrations for both polar regions, plus five months of TB grids for the north polar region.
The NASA Team Algorithm (Cavalieri et al. 1984, Gloersen and Cavalieri 1986) was used to calculate ice concentrations from the TBs. Data were produced by Dr. P. Gloersen, NASA/GSFC, Oceans and Ice Branch. Users note: SMMR TCT tapes comprised the input data set, unlike the one-volume SMMR CD-ROM product distributed by NSIDC in 1979.
An online guide available for this data set. CD-ROM distribution currently at no charge, first priority to NASA and NASA-funded investigators.
Geographic Coverage
Spatial Coordinates:
N: -39°
S: -90°
E: 180°
W: -180°
N: 90°
S: 30°
E: 180°
W: -180°
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Data Set Citation
Dataset Creator: Per Gloersen
Dataset Title: Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations
Dataset Release Place: Boulder, CO U.S.A.
Dataset Publisher: National Snow and Ice Data Center (NSIDC)
Online Resource: http://nsidc.org/data/nsi-0007.html
Temporal Coverage
Start Date: 1978-10-25
Stop Date: 1987-08-20
Location Keywords
- Continent North America Canada Hudson Bay
- Geographic Region Polar
- Ocean Arctic Ocean Baffin Bay
- Ocean Arctic Ocean Beaufort Sea
- Ocean Arctic Ocean Chukchi Sea
- Ocean Atlantic Ocean North Atlantic Ocean
- Ocean Atlantic Ocean North Atlantic Ocean Greenland Sea
- Ocean Pacific Ocean North Pacific Ocean Bering Sea
- Ocean Southern Ocean Amundsen Sea
Science Keywords
- Cryosphere Sea Ice Ice Extent
- Cryosphere Sea Ice Sea Ice Concentration
- Cryosphere Snow/Ice Ice Extent
- Oceans Sea Ice Ice Extent
- Oceans Sea Ice Sea Ice Concentration
- Spectral/Engineering Microwave Brightness Temperature
- Terrestrial Hydrosphere Snow/Ice Ice Extent
Ancillary Keywords
- Antarctic
- Arctic
- CD-ROM
- DAAC
- EOSDIS
- Global Change
- Ice
- NSIDC DAAC
- Passive Microwave
- Polar
- Radiance
- Remote Sensing
- Sea Ice Concentration
- Sea Ice Extent
- Snow
Platform
Instrument
- RADIOMETERS
- SMMR Scanning Multichannel Microwave Radiometer
Project
- EOSDIS Earth Observing System Data Information System
- ESIP Earth Science Information Partners Program
Data Set Progress
COMPLETE
Data Center
National Snow and Ice Data Center
Data Center URL: http://nsidc.org
Data Set ID: NSIDC-0007
Data Center Personnel
Name: NSIDC User Services
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
NSIDC Distributed Active Archive Center
Data Center URL: http://nsidc.org/daac/index.html
Data Set ID: SI-010
Data Center Personnel
Name: NSIDC DAAC User Services
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Distribution
Distribution Media: CD-ROM
Personnel
PER GLOERSEN
Role: INVESTIGATOR
Phone: (301) 614-5710
Fax: (301) 614-5644
Email: per.gloersen@gsfc.nasa.gov
Contact Address:
Laboratory for Hydrospheric Processes
NASA/Goddard Space Flight Center
Code 971
City: Greenbelt
Province or State: MD
Postal Code: 20771
DONALD CAVALIERI
Role: INVESTIGATOR
Phone: (301) 614-5901
Fax: (301) 614-5644
Email: don@cavalieri.gsfc.nasa.gov
Contact Address:
Laboratory for Hydrospheric Processes
NASA/Goddard Space Flight Center
Code 971
City: Greenbelt
Province or State: MD
Postal Code: 20771
NSIDC USER SERVICES
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Related URL
http://nsidc.org/data/nsidc-0007.html
Description of Nimbus-7 SMMR Polar Radiances and Sea Ice Concentrations
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.
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
Last DIF Revision Date: 2001-10-25
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