Data · collection · 2016
AIRS/Aqua L2 Near Real Time (NRT) Cloud-Cleared Infrared Radiances (AIRS-only) V006 (AIRS2CCF_NRT)
Listed in NASA Earthdata CMR
Description
The Atmospheric Infrared Sounder (AIRS) Level 2 Near Real Time (NRT) Cloud-Cleared Infrared Radiances (AIRS-only) product (AIRS2CCF_NRT_006) differs from the routine product (AIRS2CCF_006) in four ways to meet the three hour latency requirements of the Land Atmosphere NRT Capability Earth Observing System (LANCE): (1) The NRT granules are produced without previous or subsequent granules if those granules are not available within 5 minutes, (2) the predictive ephemeris/attitude data are used rather than the definitive ephemeris/attitude, (3) if the forecast surface pressure is unavailable, a surface climatology is used, and (4) no ice cloud properties retrievals are performed.
The consequences of these differences are described in the AIRS Near Real Time (NRT) data products document. The Atmospheric Infrared Sounder (AIRS) is a grating spectrometer (R = 1200) aboard the second Earth Observing System (EOS) polar-orbiting platform, EOS Aqua. In combination with the Advanced Microwave Sounding Unit (AMSU) and the Humidity Sounder for Brazil (HSB), AIRS constitutes an innovative atmospheric sounding group of visible, infrared, and microwave sensors.
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This product is produced using AIRS IR only because the radiometric noise in AMSU channel 4 started to increase significantly (since June 2007). Cloud-Cleared Radiances contain calibrated, geolocated channel-by-channel AIRS infrared radiances (milliWatts/m2/cm-1/steradian) that would have been observed within each AMSU footprint if there were no clouds in the FOV and produced along with the AIRS Standard Product, as they are the radiances used to retrieve the Standard Product.
Nevertheless, they are an order of magnitude larger in data volume than the remainder of the Standard Products and, many Standard Product users are expected to have little interest in the Cloud Cleared Radiance. For these reasons they are a separate output file. The AIRS2CCF_NRT_006 products are stored in files (often referred to as "granules") that contain 6 minutes of data, 30 footprints across track by 45 lines along track.
Links
Get the data
- discnrt1.gesdisc.eosdis.nasa.gov /data/Aqua_AIRS_NRT/AIRS2CCF_NRT.006 ↗
Access the data via HTTPS. User registration is required. Register for a username and password at https://urs.eosdis.nasa.gov/users/new
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C1345119267-GES_DISC ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
Where it is published
- disc.gsfc.nasa.gov /datacollection/AIRS2CCF_NRT_006.html ↗
Access the dataset landing page from the GES DISC website.
landing page · from NASA CMR
Documentation and papers
- AIRS Near Real Time (NRT) information disc.gsfc.nasa.gov/nrt/data-holdings/airs-nrt-products ↗
documentation · from NASA CMR
- AIRS Documentation Page docserver.gesdisc.eosdis.nasa.gov/public/project/AIRS/AIRS_Documentation.pdf ↗
documentation · from NASA CMR
- README Document docserver.gesdisc.eosdis.nasa.gov/repository/Mission/AIRS/3.3_ScienceDataProductDocumentation/3.… ↗
documentation · from NASA CMR
- Memo on NRT vs Standard Product docserver.gesdisc.eosdis.nasa.gov/repository/Mission/AIRS/3.3_ScienceDataProductDocumentation/3.… ↗
documentation · from NASA CMR
- AIRS ATBD docserver.gesdisc.eosdis.nasa.gov/repository/Mission/AIRS/3.3_ScienceDataProductDocumentation/3.… ↗
documentation · from NASA CMR
- airs.jpl.nasa.gov /index.html ↗
AIRS home page at NASA/JPL. General information on the AIRS instrument,algorithms, and other AIRS-related activities can be found.
project · from NASA CMR
- docserver.gesdisc.eosdis.nasa.gov /public/project/Images/AIRS2CCF_NRT_006.jpeg ↗
Sample data of the "AIRS/Aqua Level 2 Cloud-Cleared Infrared (IR) Radiances Product".
preview image · from NASA CMR
Catalogue records · 2
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1345119267-GES_DISC.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1345119267-GES_DISC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Atmospheric Infrared Sounder · Cloud-Cleared Infrared Radiance · Earth Observing System, Aqua
Provenance · 1 source records, 13 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1345119267-GES_DISC | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:airs | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/infrared-wavelengths/infrared-radiance/cloud-cleared-infrared-radiance | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:aqua | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |