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UARS High Resolution Doppler Imager (HRDI) Level 3AT V011 (UARHR3AT) at GES DISC

Metadata Updated: December 7, 2023

The High Resolution Doppler Imager (HRDI) Level 3AT data product consists of daily, 65.536 second interval time-ordered vertical profiles of meridional and zonal wind components, temperature and volume emmission rate of O2. The instrument measured Doppler shifts of spectral lines in the visible and near-IR between 400 and 800 nm. HRDI was flown on NASA's Upper Atmosphere Research Satellite (UARS) and designed to measure winds and other parameters in the mesosphere and lower thermosphere by primarily observing the Doppler shift of emitted light, and in the stratosphere by observing the Doppler shift of atmospheric absorption features. Measurements were made in the mesosphere between 50 and 115 km, and in the stratosphere between 10 and 40 km at about 2.5 km resolution. Data were collected between latitude 40S and 76N and 76S and 40N, alternating each satellite yaw cycle of about 36 days. The HRDI Level 3AT data were processed with the version 11 algorithm.

The HRDI level 3AT product consists of 8 granules per day. A data granule is one HRDI species or subtype per day.

Data are on the UARS standard altitude levels (in km) given by:

z(i) = 5i for i<=12 z(i) = 60 + (i-12)3 for 13 <= i <= 32 z(i) = 120 + (i-32)*5 for 33 <= i <= 88

as well as the UARS standard pressure levels (in mbars) given by:

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

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 7, 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 7, 2023
Identifier C1273348586-GES_DISC
Data First Published 1996-04-05
Language en-US
Data Last Modified 1996-04-05
Category UARS, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Hays, Paul B., Abreu, Vincent J., et al.. 1996-12-02. UARHR3AT. Version 011. UARS High Resolution Doppler Imager (HRDI) Level 3AT V011. 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 Hays, Paul B., Abreu, Vincent J., et al.
Data Presentation Form Digital Science Data
Graphic Preview File
Harvest Object Id 32b77b5a-325d-418b-919b-c2e9ab51cd07
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -76.0 180.0 76.0
Program Code 026:001
Release Place Greenbelt, MD, USA
Series Name UARHR3AT
Source Datajson Identifier True
Source Hash 302e852a9d7e9fe293ce21be004cd230dd80d26d346d915b1e52b4ca7dbc4679
Source Schema Version 1.1
Temporal 1991-11-06T00:00:00Z/1999-01-30T23:59:59.999Z

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