---
access_dt: ~
aliases:
  - context: identifier
    lexicon: datagov
    term: 818dde90-11a5-4cf5-9bcf-f815715048cf
    url: ~
  - context: dataset
    lexicon: datagov
    term: nimbus-7-smmr-polar-gridded-radiances-and-sea-ice-concentrations
    url: ~
  - context: dataset
    lexicon: nsidc
    term: oai:nsidc/NSIDC-0007
    url: http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/NSIDC-0007
attributes: ~
cite_metadata: ~
cited_by: []
contributors:
  - display_name: 'Data Producer : Per Gloersen (NASA Goddard Space Flight Center) '
    href: http://52.38.26.42:8080/contributor/18161.yaml
    id: 18161
    organization:
      country_code: US
      display_name: NASA Goddard Space Flight Center
      identifier: goddard-space-flight-center
      name: NASA Goddard Space Flight Center
      organization_type_identifier: federal
      type: organization
      url: http://www.nasa.gov/centers/goddard
    organization_uri: /organization/goddard-space-flight-center
    person:
      display_name: Per Gloersen
      first_name: Per
      id: 4854
      last_name: Gloersen
      middle_name: ~
      orcid: ~
      type: person
      url: ~
    person_id: 4854
    person_uri: /person/4854
    role_type_identifier: data_producer
    uri: /contributor/18161
  - display_name: 'Data Archive : National Snow & Ice Data Center Distributed Active Archive Center '
    href: http://52.38.26.42:8080/contributor/4440.yaml
    id: 4440
    organization:
      country_code: US
      display_name: National Snow & Ice Data Center Distributed Active Archive Center
      identifier: national-snow-ice-data-center-distributed-active-archive-center
      name: National Snow & Ice Data Center Distributed Active Archive Center
      organization_type_identifier: federal
      type: organization
      url: http://nsidc.org/daac
    organization_uri: /organization/national-snow-ice-data-center-distributed-active-archive-center
    person: {}
    person_id: ~
    person_uri: ~
    role_type_identifier: data_archive
    uri: /contributor/4440
data_qualifier: ~
description: '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 foutreen 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.'
description_attribution: ~
display_name: Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations
doi: 10.5067/QOZIVYV3V9JP
end_time: 1987-08-20T00:00:00
files: []
href: http://52.38.26.42:8080/dataset/nasa-nsidcdaac-0007.yaml
identifier: nasa-nsidcdaac-0007
instrument_measurements: []
lat_max: 90
lat_min: 30
lon_max: 180
lon_min: -180
name: Nimbus-7 SMMR Polar Gridded Radiances and Sea Ice Concentrations
native_id: NSIDC-0007
parents: []
processing_level: ~
publication_year: ~
references: []
release_dt: 2006-08-03T00:00:00
scale: ~
scope: ~
spatial_extent: ~
spatial_ref_sys: ~
spatial_res: ~
start_time: 1978-10-25T00:00:00
temporal_extent: ~
temporal_resolution: ~
type: dataset
uri: /dataset/nasa-nsidcdaac-0007
url: http://nsidc.org/data/NSIDC-0007
variables: ~
version: ~
vertical_extent: ~