Height System Unification Based on GOCE Gravity Field Models: Benefits and Challenges

2013 ◽  
pp. 147-153 ◽  
Author(s):  
Axel Rülke ◽  
Gunter Liebsch ◽  
Uwe Schäfer ◽  
Uwe Schirmer ◽  
Johannes Ihde
Keyword(s):  
Gravity Field ◽  
Height System ◽  
Gravity Field Models ◽  
Height System Unification

Differential geometry and curvatures of equipotential surfaces in the realization of the World Height System

2020 ◽  
Author(s):  
Petr Holota ◽  
Otakar Nesvadba
Keyword(s):  
Differential Geometry ◽  
Gravity Field ◽  
Physical Geodesy ◽  
Gravity Potential ◽  
Gravity Gradient ◽  
The Earth ◽  
The World ◽  
Height System ◽  
Equipotential Surfaces ◽  
Gravity Field Models

<p>The notion of an equipotential surface of the Earth’s gravity potential is of key importance for vertical datum definition. The aim of this contribution is to focus on differential geometry properties of equipotential surfaces and their relation to parameters of Earth’s gravity field models. The discussion mainly rests on the use of Weingarten’s theorem that has an important role in the theory of surfaces and in parallel an essential tie to Brun’s equation (for gravity gradient) well known in physical geodesy. Also Christoffel’s theorem and its use will be mentioned. These considerations are of constructive nature and their content will be demonstrated for high degree and order gravity field models. The results will be interpreted globally and also in merging segments expressing regional and local features of the gravity field of the Earth. They may contribute to the knowledge important for the realization of the World Height System.</p>

Orbit determination of the SELENE satellites using multi-satellite data types and evaluation of SELENE gravity field models

2011 ◽  
Vol 85 (8) ◽  
pp. 487-504 ◽  
Author(s):  
S. Goossens ◽  
K. Matsumoto ◽  
D. D. Rowlands ◽  
F. G. Lemoine ◽  
H. Noda ◽  
...  
Keyword(s):  
Gravity Field ◽  
Satellite Data ◽  
Orbit Determination ◽  
Data Types ◽  
Gravity Field Models

Preliminary monthly gravity field models from kinematic orbits of SWARM Satellites

2021 ◽  
Author(s):  
Xingfu Zhang ◽  
Qiujie Chen ◽  
Yunzhong Shen
Keyword(s):  
Gravity Field ◽  
Large Scale ◽  
Earth System ◽  
The Earth ◽  
Swarm Satellites ◽  
Variable Gravity ◽  
Data Gap ◽  
One Year ◽  
Gravity Recovery ◽  
Gravity Field Models

<p>      Although the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE FO) satellite missions play an important role in monitoring global mass changes within the Earth system, there is a data gap of about one year spanning July 2017 to May 2018, which leads to discontinuous gravity observations for monitoring global mass changes. As an alternative mission, the SWARM satellites can provide gravity observations to close this data gap. In this paper, we are dedicated to developing alternative monthly time-variable gravity field solutions from SWARM data. Using kinematic orbits of SWARM from ITSG for the period January 2015 to September 2020, we have generated a preliminary time series of monthly gravity field models named Tongji-Swarm2019 up to degree and order 60. The comparisons between Tongji-Swarm2019 and GRACE/GRACE-FO monthly solutions show that Tongji-Swarm2019 solutions agree with GRACE/GRACE-FO models in terms of large-scale mass change signals over amazon, Greenland and other regions. We can conclude that Tongji-Swarm2019 monthly gravity field models are able to close the gap between GRACE and GRACE FO.</p>

The Release 04 CHAMP and GRACE EIGEN Gravity Field Models

2010 ◽  
pp. 41-58 ◽  
Author(s):  
Frank Flechtner ◽  
Christoph Dahle ◽  
Karl Hans Neumayer ◽  
Rolf König ◽  
Christoph Förste
Keyword(s):  
Gravity Field ◽  
Gravity Field Models

Analyzing spectral characteristics of the global Earth gravity field models obtained from the CHAMP, GRACE and GOCE space missions

2015 ◽  
Vol 6 (2) ◽  
pp. 101-108 ◽  
Author(s):  
A. P. Karpik ◽  
V. F. Kanushin ◽  
I. G. Ganagina ◽  
D. N. Goldobin ◽  
E. M. Mazurova
Keyword(s):  
Gravity Field ◽  
Spectral Characteristics ◽  
Space Missions ◽  
Earth Gravity Field ◽  
Earth Gravity ◽  
Gravity Field Models

Clock networks for height system unification: a simulation study

2018 ◽  
Vol 216 (3) ◽  
pp. 1594-1607 ◽  
Author(s):  
Hu Wu ◽  
Jürgen Müller ◽  
Claus Lämmerzahl
Keyword(s):  
Simulation Study ◽  
Clock Networks ◽  
Height System ◽  
Height System Unification

GOCE Variance and Covariance Contribution to Height System Unification

2017 ◽  
pp. 157-164 ◽  
Author(s):  
V. D. Andritsanos ◽  
V. N. Grigoriadis ◽  
D. A. Natsiopoulos ◽  
G. S. Vergos ◽  
T. Gruber ◽  
...  
Keyword(s):  
Height System ◽  
Height System Unification
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