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Global Change Master Directory (GCMD)
Nimbus-7 SMMR Antenna Temperatures, Version 1
Entry ID: NSIDC-0037_1


Summary
Abstract: The SMMR Antenna Temperatures (Nimbus-7) data set consists of antenna temperatures from passive microwave radiometers aboard NOAA's Nimbus-7 satellite. The instrument is the Scanning Multichannel Microwave Radiometer (SMMR). Each file consists of one days worth of data in swath format, i.e. the portion of the Earth's surface viewed by the scanning radiometer. Antenna temperature data are available from NSIDC from October 1978 to August 1987. SMMR was a ten channel passive microwave instrument using six conventional Dicke-type radiometers. It delivered orthogonally polarized antenna temperature data at five frequencies: 6.6, 10.69, 18.0 21.0 and 37.0 GHz. The two 37.0 GHz radiometers operated
continuously for each polarization. The other radiometers alternated polarizations on alternate scans. The size of each daily file is 35 MBytes. The data are distributed on FTP. Copies of the data format description are available upon request from NSIDC.

The scanner operated only on alternate days, due to spacecraft power limitations. There are typically at least 14 days of coverage per month, although major data gaps occur in August: in August, 1982, the 4th, 8th, and 16th are missing for both polar regions; in August,
1984, the 13th through the 23rd are missing for both polar regions.


Purpose: Scientific Research

Related URL
Link: View Related Information
Description: Direct download via HTTPS protocol.


Link: View Related Information
Description: Provides access to data, documentation, tools, citation information, support, and other resources.


Link: View Related Information
Description: Includes a user's guide, supplemental documents like ATBDs and academic papers, How Tos, FAQs, etc.

Geographic Coverage
 N: 84.0 S: -84.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Title: Nimbus-7 SMMR Antenna Temperatures, Version 1
Dataset Publisher: NASA National Snow and Ice Data Center Distributed Active Archive Center
Version: 1


Temporal Coverage
Start Date: 1978-10-25
Stop Date: 1987-08-20


Location Keywords
VERTICAL LOCATION > TROPOSPHERE
GEOGRAPHIC REGION > GLOBAL


Science Keywords
SPECTRAL/ENGINEERING >MICROWAVE >ANTENNA TEMPERATURE    [Definition]


Platform
Nimbus-7    [Information]


Instrument
SMMR >Scanning Multichannel Microwave Radiometer    [Information]


Data Set Progress
COMPLETE


Data Center
National Snow and Ice Data Center    [Information]
Data Center URL: http://nsidc.org

Data Center Personnel
Name: NOT PROVIDED

National Snow and Ice Data Center    [Information]
Data Center URL: http://nsidc.org

Data Center Personnel
Name: NOT PROVIDED


Personnel
NASA NATIONAL SNOW AND ICE DATA CENTER DISTRIBUTED ACTIVE ARCHIVE CENTER
Role: DATA CENTER CONTACT
City: Boulder
Province or State: Colorado
Country: USA


NSIDC USER SERVICES
Role: TECHNICAL CONTACT
Phone: 1 303 492 6199
Fax: 1 303 492 2468
Email: nsidc at nsidc.org
Contact Address:
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA


PER GLOERSEN
Role: TECHNICAL CONTACT
Phone: 1 301 614 5710
Fax: 1 301 614 5644
Email: per.gloersen at 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


E A FRANCIS
Role: TECHNICAL CONTACT


Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2003-06-11
Last DIF Revision Date: 2019-04-16



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