NSIDC-0037_1

Nimbus-7 SMMR Antenna Temperatures, Version 1

Version 1 eng; usa
  • 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

Data Identification Fields:

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    Processing Level

    Level 1

    Quality
    Collection Progress

    Complete

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    Science Keywords
    • EARTH SCIENCE
    • Spectral/Engineering
    • Microwave
    • Antenna Temperature

Acquisition Information Fields:

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Platforms
  • Earth Observation Satellites
    Nimbus-7
    Instruments
    • SMMR

Temporal Information Fields:

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Spatial Information Fields:

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    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN GEODETIC
Location Keywords
    • Geographic Region
    • Global
    • Vertical Location
    • Troposphere

Data Centers

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  • National Snow and Ice Data Center
    ARCHIVER

    National Snow and Ice Data Center
    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
    http://nsidc.org
    • Home Page
  • National Snow and Ice Data Center
    DISTRIBUTOR

    National Snow and Ice Data Center
    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
    http://nsidc.org
    • Home Page

Data Contacts

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  • Per
    Technical Contact
    Per Gloersen

    Laboratory for Hydrospheric Processes
    NASA/Goddard Space Flight Center
    Code 971
    Greenbelt, MD 20771

    • 1 301 614 5710
    • 1 301 614 5644
    • Email
    http://nsidc.org
    • Home Page
  • E
    Technical Contact
    E Francis

    This contact does not have any addresses listed.

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    http://nsidc.org
    • Home Page
  • NASA National Snow and Ice Data Center Distributed Active Archive Center
    User Services
    NASA National Snow and Ice Data Center Distributed Active Archive Center

    Boulder, Colorado

    This contact does not have any contact mechanisms listed.

    http://nsidc.org
    • Home Page
  • NSIDC
    Data Center Contact
    NSIDC Services

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
    http://nsidc.org
    • Home Page
  • NSIDC
    Data Center Contact
    NSIDC Services

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
    http://nsidc.org
    • Home Page

Collection Citations Fields:

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    Collection Citations
    • Nimbus-7 SMMR Antenna Temperatures, Version 1
      1

      Published by: NASA National Snow and Ice Data Center Distributed Active Archive Center

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