UARS Improved Stratospheric and Mesospheric Sounder (ISAMS) Level 3AL V010 (UARIS3AL) at GES DISC

The Improved Stratospheric and Mesospheric Sounder (ISAMS) Level 3AL data product consists of daily, 4 degree increment latitude-ordered vertical profiles of temperature and concentrations of O3, H2O, CH4, CO, N2O, N2O5, NO2, and aerosol absorption coefficients. The insrument measured infrared molecular emmissions in the spectral region from 4.6 to 16.6 microns. ISAMS was flown on NASA's Upper Atmosphere Research Satellite (UARS) and designed to measure the global temperature and composition profiles in the stratosphere and mesosphere. Limb measurements were made in the altitude range between 15 and 60 km at about 2.5 km resolution. Data were collected between latitude 34S and 80N and 80S and 34N, alternating each satellite yaw cycle of about 36 days. The ISAMS Level 3AL data were processed with the version 10 algorithm, except H2O which is version 9.

The ISAMS level 3AL product consists of 10 granules per day. A data granule is one ISAMS species or subtype per day.

Data are on the UARS standard pressure levels (in mbars) given by:

P(i) = 1000 * 10**(-i/6) for i = 0, 1, 2, ...

Each of the 10 ISAMS granules is accompanied by its own additional parameter file, designated as level 3LP. The parameter file, contains the additional ancillary and quality information not found in the 3AL file. The data files are available in a binary record oriented format.

Data and Resources

Additional Info

Field Value
Maintainer JAMES JOHNSON
Last Updated March 31, 2025, 20:57 (UTC)
Created March 31, 2025, 20:57 (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 Taylor, Fredric W., et al.. 1994-07-15. UARIS3AL. Version 010. UARS Improved Stratospheric and Mesospheric Sounder (ISAMS) Level 3AL V010. 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/UARIS3AL_010.html. Digital Science Data.
creator Taylor, Fredric W., et al.
data-presentation-form Digital Science Data
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/UARIS3AL_010.png
harvest_object_id 791b8eba-b2cb-4f0b-a4aa-7ba4a4fbf21c
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C1273348587-GES_DISC
issued 1994-03-16
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1273348587-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 1994-03-16
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name UARIS3AL
source_datajson_identifier true
source_hash 385a3f3b7ac2e1d8f681f24aacd0c94f699b6e9b6b1cb1f6ddf7f1a8141f225e
source_schema_version 1.1
spatial -180.0 -80.0 180.0 80.0
temporal 1991-09-26T00:00:00Z/1992-07-29T23:59:59.999Z
theme {UARS,geospatial}