HRIR/Nimbus-3 Level 1 Meteorological Radiation Data V001 (HRIRN3L1) at GES DISC

HRIRN3L1 is the High Resolution Infrared Radiometer (HRIR) Nimbus-3 Level 1 Meteorological Radiance Data (NMRT) product and contains infrared radiances converted to equivalent black-body temperature or "brightness" temperature values. The data, originally written on IBM 360 machines, were recovered from magnetic tapes, also referred to as Nimbus Meteorological Radiation Tapes (NMRT). The data are archived in their original IBM 36-bit word proprietary format, also referred to as a binary TAP file.

The HRIR instrument was designed to perform two major functions: first to map the Earth's cloud cover at night to complement the television coverage during the daytime portion of the orbit, and second to measure the temperature of cloud tops and terrain features. The HRIR flown on Nimbus-3 was modified to allow nighttime and daytime cloud cover mapping by use of dual band-pass filter which transmits 0.7 to 1.3 micron, and 3.4 to 4.2 micron radiation. The HRIR instrument was launched on the Nimbus-3 satellite and was operational from April 14, 1966 through July 22, 1969. Nighttime operation was made in the 3.4 to 4.2 micron near infrared region. Daytime operation was based on the predominance of reflected solar energy in the 0.7 to 1.3 micron region. Change-over from nighttime to daytime operation was accomplished automatically (or by ground station command), by actuating a relay in the early stages of the radiometer electronics. The system gain was reduced in the daytime mode to compensate for the higher energy levels.

This product was previously available from the NSSDC with the identifier ESAD-00222 (old ID 69-037A-02C).

Data and Resources

Additional Info

Field Value
Maintainer JAMES JOHNSON
Last Updated March 31, 2025, 15:13 (UTC)
Created March 31, 2025, 15:13 (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 Goddard Space Flight Center (GSFC). 2009-05-29. HRIRN3L1. Version 001. HRIR/Nimbus-3 Level 1 Meteorological Radiation 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/HRIRN3L1_001.html. Digital Science Data.
creator Goddard Space Flight Center (GSFC)
data-presentation-form Digital Science Data
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/HRIRN3L1_001.png
harvest_object_id 251915b7-865f-4b1f-a36c-85ca01719931
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C1273652190-GES_DISC
issued 1969-04-17
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1273652190-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 1970-03-21
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name HRIRN3L1
source_datajson_identifier true
source_hash be4df6400e5ae7ccd621778ee33d004eec4217ec9984164de68db0cbbdae4223
source_schema_version 1.1
spatial -180.0 -90.0 180.0 90.0
temporal 1969-04-17T00:00:00Z/1970-03-21T23:59:59.999Z
theme {Nimbus,geospatial}