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HIRS/Nimbus-6 Images of Brightness Temperature on 70 mm Film V001 (HIRSN6IM) at GES DISC

Metadata Updated: December 7, 2023

The HIRSN6IM data product consists of images of brightness temperatures on 70 mm film strips from the Nimbus-6 High Resolution Infrared Radiation Sounder. Each display contains black and white images at either full vertical scale (F) or partial vertical scale (P). A full scale mode image will contain one orbit of data or 125 minutes of data, while a partial scale mode image will contain twice the vertical scale and thus requires two images for an orbit of data (the last 60 minutes on the first image, P1 and the remaining data on the second image, P2). There are 10 channels (swaths) for an orbit on each image, with a header identifying the channel (1-1, 6-6, etc.). An 18-step gray scale is found at the bottom. Time and geographic information is encoded in the center of the image. Conversion from the 18-step gray scale to brightness temperatures can be found in a table in each of the first six volumes of "The Nimbus 6 Data Catalog."

The HIRS experiment on Nimbus-6 is a follow on to the successful Nimbus-5 ITPR experiment. HIRS was a multi-channel filter radiometer with a Cassegrain telescope before the chopper assembly. The instrument scans in the cross track direction with 21 scans on each side of the subtrack point with about 30 km x 55 km resolution at nadir. HIRS measured radiances primarily in five spectral regions: (1) seven channels near the 15-micrometer CO2 absorption band, (2) two channels (11.1 and 3.7 micrometers) in the IR window, (3) two channels (8.2 and 6.7 micrometers) in the water vapor absorption band, (4) five channels in the 4.3-micrometer band, and (5) one channel in the visible 0.69-micrometer region.

The HIRS Principal Investigator was Mr. W. L. Smith from the NOAA National Environmental Satellite Service. The Nimbus-6 HIRS data are available from August 17, 1975 (day of year 229) through March 4, 1976 (day of year 238).

These data were previously archived at NASA NSSDC under the entry ID ESAD-00094 (old id 75-052A-02A).

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date May 30, 2023
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Graphic Preview


Additional Metadata

Resource Type Dataset
Metadata Created Date May 30, 2023
Metadata Updated Date December 7, 2023
Identifier C2563802716-GES_DISC
Data First Published 2022-01-27
Language en-US
Data Last Modified 2022-01-27
Category CWIC, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Goddard Space Flight Center (GSFC). 2022-12-12. HIRSN6IM. Version 001. HIRS/Nimbus-6 Images of Brightness Temperature on 70 mm Film V001. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). Digital Science Data.
Creator Goddard Space Flight Center (GSFC)
Data Presentation Form Digital Science Data
Graphic Preview Description HIRS
Graphic Preview File
Harvest Object Id 2e97b52e-51c3-44b9-8236-e24c370be1f5
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Release Place Greenbelt, MD, USA
Series Name HIRSN6IM
Source Datajson Identifier True
Source Hash eccc04df42c932593949bbc62c156f6bbbc46e6ef492026e903ff0e5a259ee1d
Source Schema Version 1.1
Temporal 1975-06-13T00:00:00Z/1976-05-26T23:59:59.999Z

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