Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Gravity, Geoid and Earth Observation - IAG Commission 2 |
| Untertitel | Gravity Field |
| Seiten | 139-146 |
| Seitenumfang | 8 |
| Publikationsstatus | Veröffentlicht - 2010 |
| Veranstaltung | IAG International Symposium on "Gravity, Geoid and Earth Observation 2008" - Chania, Crete, Deutschland Dauer: 23 Juni 2008 → 27 Juni 2008 |
Publikationsreihe
| Name | International Association of Geodesy Symposia |
|---|---|
| Band | 135 |
| ISSN (Print) | 0939-9585 |
Abstract
Global gravity solutions are generally influenced by degenerating effects such as insufficient spatial sampling and background models among others. Local irregularities in data supply can only be overcome by splitting the solution in a global reference and a local residual part. This research aims at the creation of a framework for the derivation of a local and regional gravity field solution utilizing the so-called line-of-sight gradiometry in a GRACE-scenario connected to a set of rapidly decaying base functions. In the usual approach, the latter are centered on a regular grid and only the scale parameter is estimated. The resulting poor condition of the normal matrix is counteracted by regularization. By contrast, here the positions as well as the shape of the base functions are additionally subject to the estimation process. As a consequence, the number of base functions can be minimized. The analysis of the residual observations by local base functions enables the resolution of details in the gravity field which are not contained in the global spherical harmonic solution. The methodology is tested using simulated as well as real GRACE data.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Computer in den Geowissenschaften
- Erdkunde und Planetologie (insg.)
- Geophysik
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Gravity, Geoid and Earth Observation - IAG Commission 2: Gravity Field. 2010. S. 139-146 (International Association of Geodesy Symposia; Band 135).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Regional Gravity Field Recovery from GRACE Using Position Optimized Radial Base Functions
AU - Weigelt, M.
AU - Antoni, M.
AU - Keller, W.
PY - 2010
Y1 - 2010
N2 - Global gravity solutions are generally influenced by degenerating effects such as insufficient spatial sampling and background models among others. Local irregularities in data supply can only be overcome by splitting the solution in a global reference and a local residual part. This research aims at the creation of a framework for the derivation of a local and regional gravity field solution utilizing the so-called line-of-sight gradiometry in a GRACE-scenario connected to a set of rapidly decaying base functions. In the usual approach, the latter are centered on a regular grid and only the scale parameter is estimated. The resulting poor condition of the normal matrix is counteracted by regularization. By contrast, here the positions as well as the shape of the base functions are additionally subject to the estimation process. As a consequence, the number of base functions can be minimized. The analysis of the residual observations by local base functions enables the resolution of details in the gravity field which are not contained in the global spherical harmonic solution. The methodology is tested using simulated as well as real GRACE data.
AB - Global gravity solutions are generally influenced by degenerating effects such as insufficient spatial sampling and background models among others. Local irregularities in data supply can only be overcome by splitting the solution in a global reference and a local residual part. This research aims at the creation of a framework for the derivation of a local and regional gravity field solution utilizing the so-called line-of-sight gradiometry in a GRACE-scenario connected to a set of rapidly decaying base functions. In the usual approach, the latter are centered on a regular grid and only the scale parameter is estimated. The resulting poor condition of the normal matrix is counteracted by regularization. By contrast, here the positions as well as the shape of the base functions are additionally subject to the estimation process. As a consequence, the number of base functions can be minimized. The analysis of the residual observations by local base functions enables the resolution of details in the gravity field which are not contained in the global spherical harmonic solution. The methodology is tested using simulated as well as real GRACE data.
KW - Grace
KW - Line-of-sight gradiometry
KW - Non-linear optimization
KW - Radial base functions
UR - http://www.scopus.com/inward/record.url?scp=84884374640&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-10634-7_19
DO - 10.1007/978-3-642-10634-7_19
M3 - Conference contribution
AN - SCOPUS:84884374640
SN - 9783642106330
T3 - International Association of Geodesy Symposia
SP - 139
EP - 146
BT - Gravity, Geoid and Earth Observation - IAG Commission 2
T2 - IAG International Symposium on "Gravity, Geoid and Earth Observation 2008"
Y2 - 23 June 2008 through 27 June 2008
ER -