SIRS/Nimbus-4 Level 1 Radiance Data V001 (SIRSN4L1) at GES DISC

SIRSN4L1 is the Nimbus-4 Satellite Infrared Spectrometer (SIRS) Level 1 Radiance Data product. SIRS measured infrared radiation (11 to 36 micrometers) emitted from the earth and its atmosphere in 13 selected spectral intervals in the carbon dioxide and water vapor bands plus one channel in the 11-micrometer atmospheric window. The radiances were used to determine the vertical temperature and water vapor profiles of the atmosphere. The data were recovered from the original 6250 tapes, and are now stored online as daily files in their original proprietary binary format each with about 14 orbits per day.

The Nimbus-4 SIRS used a scan mirror to observe 12.5 deg to either side of the subsatellite track. Spatial coverage is near global from latitude -85 to +85 degrees. The data are available from 08 April 1970 (day of year 98) to 08 April 1971. The principal investigator for the SIRS experiment was Dr. David Q. Wark from the NOAA National Environmental Satellite Data and Information Service.

This product was previously available from the NSSDC with the identifier ESAD-00130 (old ID 70-025A-04A).

Data and Resources

Additional Info

Field Value
Maintainer JAMES JOHNSON
Last Updated February 19, 2025, 00:05 (UTC)
Created February 19, 2025, 00:05 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation NASA/GSFC. 2019-07-02. SIRSN4L1. Version 001. SIRS/Nimbus-4 Level 1 Radiance Data V001. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://disc.gsfc.nasa.gov/datacollection/SIRSN4L1_001.html. Digital Science Data.
creator NASA/GSFC
data-presentation-form Digital Science Data
graphic-preview-description Typical data coverage of a Nimbus 4 SIRS Level 1 data file.
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Nimbus/images/SIRSN4L1_Sample.png
harvest_object_id ef42b8fe-719c-43f5-8168-ca7eff6493bb
harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier C1622768259-GES_DISC
issued 2013-04-29
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1622768259-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2019-02-04
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name SIRSN4L1
source_datajson_identifier true
source_hash c1dccff02c01c025d06d60c69298df851f30832f08c2c05ea54cab2741da74c8
source_schema_version 1.1
spatial -180.0 -85.0 180.0 85.0
temporal 1970-04-08T00:00:00Z/1971-04-08T23:59:59.999Z
theme {Nimbus,geospatial}