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Aqua/AIRS L3 Daily Standard Physical Retrieval (AIRS-only) 1 degree x 1 degree V7.0 at GES DISC

Metadata Updated: February 7, 2024

The Atmospheric Infrared Sounder (AIRS) is a grating spectrometer (R = 1200) aboard the second Earth Observing System (EOS) polar-orbiting platform, EOS Aqua. The AIRS Level 3 Daily Gridded Product contains standard retrieval means, standard deviations and input counts. Each file covers a temporal period of 24 hours for either the descending (equatorial crossing North to South at 1:30 AM local time) or ascending (equatorial crossing South to North at 1:30 PM local time) orbit. The data starts at the international dateline and progresses westward (as do the subsequent orbits of the satellite) so that neighboring gridded cells of data are no more than a swath of time apart (about 90 minutes). The two parts of a scan line crossing the dateline are included in separate L3 files, according to the date, so that data points in a grid box are always coincident in time. The edge of the AIRS Level 3 gridded cells is at the date line (the 180E/W longitude boundary). When plotted, this produces a map with 0 degrees longitude in the center of the image unless the bins are reordered. This method is preferred because the left (West) side of the image and the right (East) side of the image contain data farthest apart in time. The gridding scheme used by AIRS is the same as used by TOVS Pathfinder to create Level 3 products. The daily Level 3 products have gores between satellite paths where there is no coverage for that day. The geophysical parameters have been averaged and binned into 1 x 1 deg grid cells, from -180.0 to +180.0 deg longitude and from -90.0 to +90.0 deg latitude. For each grid map of 4-byte floating-point mean values there is a corresponding 4-byte floating-point map of standard deviation and a 2-byte integer grid map of counts. The counts map provides the user with the number of points per bin that were included in the mean and can be used to generate custom multi-day maps from the daily gridded products. The thermodynamic parameters are: Skin Temperature (land and sea surface), Air Temperature at the surface, Profiles of Air Temperature and Water Vapor, Tropopause Characteristics, Column Precipitable Water, Cloud Amount/Frequency, Cloud Height, Cloud Top Pressure, Cloud Top Temperature, Reflectance, Emissivity, Surface Pressure, Cloud Vertical Distribution. The trace gases parameters are: Total Amounts and Vertical Profiles of Carbon Monoxide, Methane, and Ozone. The actual names of the variables in the data files should be inferred from the Processing File Description document.

The value for each grid box is the sum of the values that fall within the 1x1 area divided by the number of points in the box.

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

References

https://doi.org/10.1117/1.JRS.8.084994
https://doi.org/10.5194/acp-14-399-2014

Dates

Metadata Created Date November 12, 2020
Metadata Updated Date February 7, 2024

Metadata Source

Harvested from NASA Data.json

Graphic Preview

Sample data of the "Aqua/AIRS Level 3 daily standard physical retrieval product".

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date February 7, 2024
Publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
Maintainer
Identifier C1701805652-GES_DISC
Data First Published 2002-08-31
Language en-US
Data Last Modified 2024-01-30
Category Aqua, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation AIRS project. 2019-12-15. AIRS3STD. Version 7.0. Aqua/AIRS L3 Daily Standard Physical Retrieval (AIRS-only) 1 degree x 1 degree V7.0. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://doi.org/10.5067/UO3Q64CTTS1U. https://disc.gsfc.nasa.gov/datacollection/AIRS3STD_7.0.html. Digital Science Data.
Creator AIRS project
Data Presentation Form Digital Science Data
Graphic Preview Description Sample data of the "Aqua/AIRS Level 3 daily standard physical retrieval product".
Graphic Preview File https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/AIRS3STD_7.0.png
Harvest Object Id 0dc5e8bc-9acb-4314-a15d-9f06c972d3a3
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/UO3Q64CTTS1U
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Related Documents https://doi.org/10.1117/1.JRS.8.084994, https://doi.org/10.5194/acp-14-399-2014
Release Place Greenbelt, MD, USA
Series Name AIRS3STD
Source Datajson Identifier True
Source Hash 32797b759c96dcb4d56408f4831a9e013379cec97f4e0bfe1e85059d989902d4
Source Schema Version 1.1
Spatial
Temporal 2002-08-31T00:00:00Z/2024-02-05T00:00:00Z

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