Nimbus-7 SMMR Antenna Temperatures
Entry ID: NSIDC-0037

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

Data Set Citation
Dataset Originator/Creator: Gloersen, P. and E. A. Francis.
Dataset Title: Nimbus-7 SMMR Antenna Temperatures
Dataset Release Date: 2003-06-11
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Version: 1
Online Resource: http://nsidc.org/data/NSIDC-0037


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


Location Keywords
GEOGRAPHIC REGION > GLOBAL
VERTICAL LOCATION > TROPOSPHERE


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


ISO Topic Category
IMAGERY/BASE MAPS/EARTH COVER


Platform
NIMBUS-7    [Information]
SATELLITES    [Information]


Instrument
Radiometers    [Information]
SMMR >Scanning Multichannel Microwave Radiometer    [Information]


Project
EOSDIS >Earth Observing System Data Information System    [Information]
ESIP >Earth Science Information Partners Program    [Information]


Keywords
Antenna Temperature
EOSDIS
IDN_NODE GSFC/MSFC DAAC
Passive Microwave
Sensor Counts
TA
TAT


Data Set Progress
COMPLETE


Data Center
NSIDC Distributed Active Archive Center    [Information]
Data Center URL: http://nsidc.org/daac/index.html

Data Center Personnel
Name: NSIDC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at 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


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

Data Center Personnel
Name: NSIDC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at 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: FTP
Distribution_Format: HDF


Personnel
NSIDC USER SERVICES
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at 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


Publications/References
Systems and Applied Sciences Corporation, 1982: Users' Guide for the Scanning Multichannel Microwave Radiometer Instrument First Year Antenna Temperature Data Set. Systems and Applied Sciences Corporation Technical Document.

Creation and Review Dates
DIF Creation Date: 2003-06-11
Last DIF Revision Date: 2014-07-16

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