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

Metadata Updated: December 6, 2023

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.

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 November 12, 2020
Metadata Updated Date December 6, 2023

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date December 6, 2023
Identifier C1273348587-GES_DISC
Data First Published 1994-03-16
Language en-US
Data Last Modified 1994-03-16
Category UARS, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
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). Digital Science Data.
Creator Taylor, Fredric W., et al.
Data Presentation Form Digital Science Data
Graphic Preview File
Harvest Object Id f5b3faf7-d637-4b1a-a538-d6e92c0738ed
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -80.0 180.0 80.0
Program Code 026:001
Release Place Greenbelt, MD, USA
Series Name UARIS3AL
Source Datajson Identifier True
Source Hash 385a3f3b7ac2e1d8f681f24aacd0c94f699b6e9b6b1cb1f6ddf7f1a8141f225e
Source Schema Version 1.1
Temporal 1991-09-26T00:00:00Z/1992-07-29T23:59:59.999Z

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