Details
| Original language | English |
|---|---|
| Title of host publication | Geodesy for Planet Earth - Proceedings of the 2009 IAG Symposium |
| Pages | 537-543 |
| Number of pages | 7 |
| Publication status | Published - 1 Dec 2012 |
| Event | IAG Symposium on Geodesy for Planet Earth, IAG 2009 - Chania, Crete, Argentina Duration: 31 Aug 2009 → 4 Sept 2009 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 136 |
| ISSN (Print) | 0939-9585 |
Abstract
The time variable gravity field of the Earth is determined by GRACE and SLR. Different gravity field solutions reveal some discrepancies in the low degree coefficients, especially C20. The second degree gravity field coefficients are directly related to the Earth's unknown tensor of inertia as well as the mass terms of the excitation functions, which describe the effects of atmosphere and ocean on Earth rotation. A further relationship exists between the Earth orientation parameters (polar motion and length of day), the motion terms of the excitation functions and the tensor of inertia. Up to now these interdependencies are not used for the calculation of the gravity field coefficients. They can therefore be used to validate the various parameter groups mutually. More reliable second degree gravity field coefficients can possibly be obtained if the Earth orientation parameters and the excitation functions are taken into account. This paper presents a novel method to integrate Earth orientation parameters, excitation functions and gravity field coefficients in a least-squares adjustment model with additional condition equations. This leads to consistent time series.
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
Geodesy for Planet Earth - Proceedings of the 2009 IAG Symposium. 2012. p. 537-543 (International Association of Geodesy Symposia; Vol. 136).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Stabilization of Satellite Derived Gravity Field Coefficients by Earth Orientation Parameters and Excitation Functions
AU - Heiker, Andrea
AU - Kutterer, Hansjörg
AU - Müller, Jürgen
N1 - Funding information: The results presented have been derived within the work on the project “Mutual validation of EOP and gravity field coefficients” within the research unit Earth Rotation and global geodynamic processes funded by the German Research Foundation (DFG FOR584: http://www.erdrotation.de ). This is gratefully acknowledged.
PY - 2012/12/1
Y1 - 2012/12/1
N2 - The time variable gravity field of the Earth is determined by GRACE and SLR. Different gravity field solutions reveal some discrepancies in the low degree coefficients, especially C20. The second degree gravity field coefficients are directly related to the Earth's unknown tensor of inertia as well as the mass terms of the excitation functions, which describe the effects of atmosphere and ocean on Earth rotation. A further relationship exists between the Earth orientation parameters (polar motion and length of day), the motion terms of the excitation functions and the tensor of inertia. Up to now these interdependencies are not used for the calculation of the gravity field coefficients. They can therefore be used to validate the various parameter groups mutually. More reliable second degree gravity field coefficients can possibly be obtained if the Earth orientation parameters and the excitation functions are taken into account. This paper presents a novel method to integrate Earth orientation parameters, excitation functions and gravity field coefficients in a least-squares adjustment model with additional condition equations. This leads to consistent time series.
AB - The time variable gravity field of the Earth is determined by GRACE and SLR. Different gravity field solutions reveal some discrepancies in the low degree coefficients, especially C20. The second degree gravity field coefficients are directly related to the Earth's unknown tensor of inertia as well as the mass terms of the excitation functions, which describe the effects of atmosphere and ocean on Earth rotation. A further relationship exists between the Earth orientation parameters (polar motion and length of day), the motion terms of the excitation functions and the tensor of inertia. Up to now these interdependencies are not used for the calculation of the gravity field coefficients. They can therefore be used to validate the various parameter groups mutually. More reliable second degree gravity field coefficients can possibly be obtained if the Earth orientation parameters and the excitation functions are taken into account. This paper presents a novel method to integrate Earth orientation parameters, excitation functions and gravity field coefficients in a least-squares adjustment model with additional condition equations. This leads to consistent time series.
UR - http://www.scopus.com/inward/record.url?scp=84884302944&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-20338-1_65
DO - 10.1007/978-3-642-20338-1_65
M3 - Conference contribution
AN - SCOPUS:84884302944
SN - 9783642203374
T3 - International Association of Geodesy Symposia
SP - 537
EP - 543
BT - Geodesy for Planet Earth - Proceedings of the 2009 IAG Symposium
T2 - IAG Symposium on Geodesy for Planet Earth, IAG 2009
Y2 - 31 August 2009 through 4 September 2009
ER -