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

    Metadata Updated: April 9, 2025

    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

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date April 9, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date April 9, 2025
    Publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
    Maintainer
    Identifier C1273348586-GES_DISC
    Data First Published 1996-04-05
    Language en-US
    Data Last Modified 2025-04-01
    Category UARS, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 23152da7-33a7-4614-b5ff-b067a9a1f85b
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://cmr.earthdata.nasa.gov:443/search/concepts/C1273348586-GES_DISC.html
    Metadata Type geospatial
    Old Spatial -180.0 -76.0 180.0 76.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 5ea12c4918c2e490c001b45a837cc56489d7ef65189bb097c4ba77b36ebba6f7
    Source Schema Version 1.1
    Spatial
    Temporal 1991-11-06T00:00:00Z/1999-01-30T23:59:59.999Z

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