Data · collection · 2021
GPM DPR Ka Environment L2A 1.5 hours 5 km V07 (GPM_2AKaENV)
Listed in NASA Earthdata CMR
Version 07 is the current version of the data set.
Description
Older versions will no longer be available and have been superseded by Version 07. . This is environmental data that includes the profiles of atmospheric parameters assumed in the L2 retrieval algorithm.
The 2AKa algorithm provides precipitation estimates from the Ka radar of the Dual-Frequency Precipitation Radar on the core GPM spacecraft. The product contains two swaths of data corresponding to the scans of the Ka radar. The first swath contains matched scans (MS), which are intended to be co-aligned with the Ku-band instantaneous fields of view (IFOV).
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The second swath contains the high-sensitivity scans (HS), which are interleaved between the Ku/Ka-MS swaths. Both swaths are narrow and centered within the interior of the Ku swath. This is a single-frequency retrieval of precipitation; no information from the Ku radar is used.
The retrievals are performed at each radar range bin along the slant path of the radar IFOV for each swath. This is a single-frequency retrieval that relies on Ka-band data only. While the 2ADPR dual-frequency retrieval should give better overall estimates, that algorithm requires co-aligned Ku-band data.
This 2AKa product will be produced independently and would not be impacted by any operational issues with the Ku-band radar. The high sensitivity to smaller hydrometeors should result in precipitation estimates in lighter precipitation than the Ku-only data.
Links
Get the data
- Access the data via the OPeNDAP protocol cmr.earthdata.nasa.gov/virtual-directory/collections/C2179301732-GES_DISC/temporal ↗
metadata API · download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C2179301732-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/GPM_2AKaENV_07.html ↗
Access the dataset landing page from the GES DISC website.
landing page · from NASA CMR
Documentation and papers
- GPM and partner sensors anomalous events gpmweb2https.pps.eosdis.nasa.gov/tsdis/AB/docs/gpm_anomalous.html ↗
documentation · from NASA CMR
- FILE SPECIFICATION DOCUMENT gpmweb2https.pps.eosdis.nasa.gov/pub/GPMfilespec/filespec.GPM.pdf ↗
documentation · from NASA CMR
- Instrument Description pps.gsfc.nasa.gov/gpminstruments.html ↗
documentation · from NASA CMR
- GPM Project Home Page gpm.nasa.gov ↗
project · from NASA CMR
- Sample Image docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/browse/GPM_2AKaENV.png ↗
preview image · from NASA CMR
Catalogue records · 2
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2179301732-GES_DISC.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2179301732-GES_DISC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Atmospheric Water Vapor · Dual-frequency Precipitation Radar · Global Precipitation Measurement · Precipitation
- Inferred from text
- Atmospheric sciences 71%
Provenance · 1 source records, 15 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2179301732-GES_DISC | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3701 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (71%) |
| concepts[instrument].gcmd_instrument:dpr | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-water-vapor | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/precipitation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:gpm | 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 |