Data · collection
High Resolution Earth Gravity Field Models from Satellite and Tracking Data, Sea Surface Heights and Gravity Anomalies, Spherical Harmonic Representation
Listed in NASA Earthdata CMR
The high resolution Earth gravity field models, produced by GFZ, contain spherical harmonic coefficients complete to degree and order 360.
Description
A-priori information is taken from long wavelength gravity field GRIM (see other GFZ data set descriptions). High frequency determination is based on both surface gravity and ocean geoid heights.
Surface gravity is corrected for topographic and atmospheric effects. Ocean geoid heights are derived from mean sea surface height models determined from altimeter data (e.g. ERS-1, ERS-2, Topex, Geosat, Seasat, Geos3 and others). They are corrected for sea surface topography and permanent tidal deformation.
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The estimation of the 360 field is based on a least squares harmonic analysis. With globally distributed, equally spaced data sets, the normal equation system decomposes to block diagonal structure. Undefined data are successively substituted by block mean values from intermediate results.
Links
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214602657-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214602657-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Gravitational Field · Marine Gravity Field · Not provided · Sea Surface Height · Topographic Effects
- Inferred from text
- Geophysics 73%
Provenance · 1 source records, 12 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214602657-SCIOPS | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3706 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (73%) |
| concepts[measured_variable].gcmd:earth-science/land-surface/topography/topographic-effects | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/marine-geophysics/marine-gravity-field | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/sea-surface-topography/sea-surface-height | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/gravity-gravitational-field/gravitational-field | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:not-provided | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| 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 |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |