Details
| Original language | English |
|---|---|
| Title of host publication | Gravity, Geoid and Space Missions |
| Subtitle of host publication | GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004 |
| Pages | 60-65 |
| Number of pages | 6 |
| ISBN (electronic) | 978-3-540-26932-8 |
| Publication status | Published - 2005 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 129 |
| ISSN (Print) | 0939-9585 |
Abstract
With the upcoming ESA satellite mission GOCE, gravitational gradients (2nd derivatives of the Earth's gravitational potential) will be measured globally, except for the polar gaps. An accuracy of a few mE (1 mE = 10-3 Eötvös, 1 E = 10-9s-2) is required to derive, in combination with satelliteto-satellite tracking (SST) measurements, a global geopotential model up to about spherical harmonic degree 200 with an accuracy of 1... 2 cm in terms of geoid undulations and 1 mgal for gravity anomalies, respectively. To meet these requirements, the gradiometer will be calibrated and validated internally as well as externally. One strategy for an external calibration or validation includes the use of ground data upward continued to satellite altitude. This strategy can only be applied regionally, because sufficiently accurate ground data are only available for selected areas. In this study, gravity anomalies over Europe are upward continued to gravitational gradients at GOCE altitude. The computations are done with synthetic data in a closed-loop simulation. Two upward continuation methods are considered, namely least-squares collocation and integral formulas based on the spectral combination technique. Both methods are described and the results are compared numerically with the ground-truth data.
Keywords
- Calibration, GOCE, Gradiometry, Leastsquares collocation, Spectral combination, Upward continuation, Validation
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
Gravity, Geoid and Space Missions: GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004. 2005. p. 60-65 (International Association of Geodesy Symposia; Vol. 129).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Upward Continuation of Ground Data for GOCE Calibration/Validation Purposes
AU - Wolf, K. I.
AU - Denker, H.
N1 - Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2005
Y1 - 2005
N2 - With the upcoming ESA satellite mission GOCE, gravitational gradients (2nd derivatives of the Earth's gravitational potential) will be measured globally, except for the polar gaps. An accuracy of a few mE (1 mE = 10-3 Eötvös, 1 E = 10-9s-2) is required to derive, in combination with satelliteto-satellite tracking (SST) measurements, a global geopotential model up to about spherical harmonic degree 200 with an accuracy of 1... 2 cm in terms of geoid undulations and 1 mgal for gravity anomalies, respectively. To meet these requirements, the gradiometer will be calibrated and validated internally as well as externally. One strategy for an external calibration or validation includes the use of ground data upward continued to satellite altitude. This strategy can only be applied regionally, because sufficiently accurate ground data are only available for selected areas. In this study, gravity anomalies over Europe are upward continued to gravitational gradients at GOCE altitude. The computations are done with synthetic data in a closed-loop simulation. Two upward continuation methods are considered, namely least-squares collocation and integral formulas based on the spectral combination technique. Both methods are described and the results are compared numerically with the ground-truth data.
AB - With the upcoming ESA satellite mission GOCE, gravitational gradients (2nd derivatives of the Earth's gravitational potential) will be measured globally, except for the polar gaps. An accuracy of a few mE (1 mE = 10-3 Eötvös, 1 E = 10-9s-2) is required to derive, in combination with satelliteto-satellite tracking (SST) measurements, a global geopotential model up to about spherical harmonic degree 200 with an accuracy of 1... 2 cm in terms of geoid undulations and 1 mgal for gravity anomalies, respectively. To meet these requirements, the gradiometer will be calibrated and validated internally as well as externally. One strategy for an external calibration or validation includes the use of ground data upward continued to satellite altitude. This strategy can only be applied regionally, because sufficiently accurate ground data are only available for selected areas. In this study, gravity anomalies over Europe are upward continued to gravitational gradients at GOCE altitude. The computations are done with synthetic data in a closed-loop simulation. Two upward continuation methods are considered, namely least-squares collocation and integral formulas based on the spectral combination technique. Both methods are described and the results are compared numerically with the ground-truth data.
KW - Calibration
KW - GOCE
KW - Gradiometry
KW - Leastsquares collocation
KW - Spectral combination
KW - Upward continuation
KW - Validation
UR - http://www.scopus.com/inward/record.url?scp=84884403628&partnerID=8YFLogxK
U2 - 10.1007/3-540-26932-0_11
DO - 10.1007/3-540-26932-0_11
M3 - Conference contribution
AN - SCOPUS:84884403628
SN - 978-3-540-26930-4
T3 - International Association of Geodesy Symposia
SP - 60
EP - 65
BT - Gravity, Geoid and Space Missions
ER -