Imaging · collection · 2001
GNSS radio occultation L1B excess phase and amplitude for CHAMP as contributed by JPL, version 2.0 (gnssro_champ_jpl_l1b)
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/sokhj33mxjka
This dataset provides Global Navigation Satellite System (GNSS) Radio Occultation (RO) Excess Phase and Amplitude data from the Challenging Mini-satellite Payload (CHAMP) mission as contributed by the Jet Propulsion Laboratory.
Description
Each granule represents a single occultation. GNSS RO is a remote sensing technique that measures the refracted radio signals generated by GNSS satellites and viewed through Earth’s limb.
Parameters describing the refraction can be used to infer familiar atmospheric variables such as temperature, pressure and water vapor. The RO technique allows for increased global coverage of temperature and water vapor through the large number of daily observations and as a result plays an important role in the enhancement of Numerical Weather Prediction and other atmospheric-related studies.
Links
Get the data
- Resource disc.gsfc.nasa.gov/datacollection/gnssro_champ_jpl_l1b_2.0.html ↗
Access the dataset landing page from the GES DISC website.
landing page · download · from NASA CMR, data nasa gov
- PDF docserver.gesdisc.eosdis.nasa.gov/public/project/GNSS_RO/GNSSRO_ATBD_V1.pdf ↗
Global Navigation Satellite Systems Radio Occultation Algorithm Theoretical Basis Document
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C3628338958-GES_DISC.iso19115 ↗
download · from data nasa gov
- search.earthdata.nasa.gov /search/granules?p=C3628338958-GES_DISC ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- Access the data via HTTPS. cmr.earthdata.nasa.gov/virtual-directory/collections/C3628338958-GES_DISC ↗
download · from NASA CMR
- Resource search.earthdata.nasa.gov/search?q=gnssro_champ_jpl_l1b_2.0 ↗
download · from data nasa gov
- PDF docserver.gesdisc.eosdis.nasa.gov/public/project/GNSS_RO/README_GNSS-RO_AWSCloud_V2.pdf ↗
download · from data nasa gov
- PNG docserver.gesdisc.eosdis.nasa.gov/public/project/GNSS_RO/images/gnssro_champ_jpl_L1B_2.0_2004_4_… ↗
download · preview image · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/gnss-radio-occultation-l1b-excess-phase-and-amplitude-… ↗
landing page · from data nasa gov
- DOI doi.org/10.5067/sokhj33mxjka ↗
DOI / persistent id · from NASA CMR
Documentation and papers
- README Document docserver.gesdisc.eosdis.nasa.gov/public/project/GNSS_RO/README_GNSS-RO_AWSCloud_V2_RevSept2026.… ↗
documentation · from NASA CMR
Catalogue records · 3
- CKAN API data.nasa.gov/api/3/action/package_show?id=0f1891c5-8be2-481c-b37b-324b908c4… ↗
metadata API · from data nasa gov
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C3628338958-GES_DISC.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C3628338958-GES_DISC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Challenging Minisatellite Payload · Excess Phase · GNSS RECEIVERS · Orbital Position
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
- Inferred from text
- Satellite remote sensing 65% · Space sciences 69%
Provenance · 2 source records, 20 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C3628338958-GES_DISC | 8 d ago | JSON v1 |
| NASA Data Portal | 0f1891c5-8be2-481c-b37b-324b908c4a9c | 5 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:5109 | enrichment · NASA CMR | taxonomy-embedding@1.0.0 | title+keywords+description (69%) |
| concepts[field].local:field:astronomy | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:physics | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[instrument].gcmd_instrument:gnss | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/radio-occultation-profiles/excess-phase | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/gravity-gravitational-field/satellite-orbits-revolution/orbital-position | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:remote-sensing | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[platform].gcmd_platform:champ | 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 |