GOCE gravitational gradiometry

Rummel, Reiner; Yi, Wu; Stummer, C.

doi:10.1007/s00190-011-0500-0

Cited by 249 publications

(168 citation statements)

References 20 publications

Supporting

Mentioning

164

Contrasting

Order By: Relevance

“…For the geomagnetic case, this has important implications because the gradients of the field are not measured instantaneously by a single satellite instrument. The radial gradient is currently not possible to be measured, as, for example, in the gravity case and the GOCE mission where the complete gradient tensor can be determined instantaneously by a gravity gradiometer (Rummel et al 2011 } can be determined by the lowest satellite pair and contain similar information regarding the estimation of the model parameters as the radial gradient. Furthermore, the gradient combinations can be related to the magnetic field potential and the traditional spherical harmonic expansion coefficients with the help of simple eigenvalue relations, and therefore, they can be used for magnetic field modeling.…”

Section: Discussionmentioning

confidence: 99%

Toward more complete magnetic gradiometry with the Swarm mission

Kotsiaros

2016

Earth Planet Sp

View full text Add to dashboard Cite

An analytical and numerical analysis of the spectral properties of the gradient tensor, initially performed by Rummel and van Gelderen (Geophys J Int 111(1):159-169, 1992) for the gravity potential, shows that when the tensor elements are grouped into sets of semi-tangential and pure-tangential parts, they produce almost identical signal content as the normal element. Moreover, simple eigenvalue relations can be derived between these sets and the spherical harmonic expansion of the potential. This theoretical development generally applies to any potential field. First, the analysis of Rummel and van Gelderen (1992) is adapted to the magnetic field case and then the elements of the magnetic gradient tensor are estimated by 2 years of Swarm data and grouped intoIt is shown that the estimated combinations Ŵ (1) and Ŵ (2) produce similar signal content as the theoretical radial gradient Ŵ (0) = {[∇B] rr }. These results demonstrate the ability of multi-satellite missions such as Swarm, which cannot directly measure the radial gradient, to retrieve similar signal content by means of the horizontal gradients. Finally, lithospheric field models are derived using the gradient combinations Ŵ (1) and Ŵ (2) and compared with models derived from traditional vector and gradient data. The model resulting from Ŵ (1) leads to a very similar, and in particular cases improved, model compared to models retrieved by using approximately three times more data, i.e., a full set of vector, North-South and East-West gradients. This demonstrates the high information content of Ŵ (1) .

show abstract

Section: Discussionmentioning

confidence: 99%

Toward more complete magnetic gradiometry with the Swarm mission

Kotsiaros

2016

Earth Planet Sp

View full text Add to dashboard Cite

show abstract

“…Gravity field variations related to the GIA have supported the hypothesis that the Pleistocene ice sheets over Canada consisted of two major domes , even though part of the interpreted GIA pattern may have been hydrological mass variations (van der Wal et al 2008;Sasgen et al 2012). In addition to GRACE, then Gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite provides unprecedented maps of the static geoid and gravity field (Rummel 2011;Pail et al 2011Pail et al ) since 2009. GOCE is providing synergetic information on the ocean circulation and other Earth system processes as well as on lithospheric structure.…”

Section: Introductionmentioning

confidence: 87%

Earth System Mass Transport Mission (e.motion): A Concept for Future Earth Gravity Field Measurements from Space

et al. 2012

View full text Add to dashboard Cite

In the last decade, satellite gravimetry has been revealed as a pioneering technique for mapping mass redistributions within the Earth system. This fact has allowed us to have an improved understanding of the dynamic processes that take place within and -012-9209-8 between the Earth's various constituents. Results from the Gravity Recovery And Climate Experiment (GRACE) mission have revolutionized Earth system research and have established the necessity for future satellite gravity missions. In 2010, a comprehensive team of European and Canadian scientists and industrial partners proposed the e.motion (Earth system mass transport mission) concept to the European Space Agency. The proposal is based on two tandem satellites in a pendulum orbit configuration at an altitude of about 370 km, carrying a laser interferometer inter-satellite ranging instrument and improved accelerometers. In this paper, we review and discuss a wide range of mass signals related to the global water cycle and to solid Earth deformations that were outlined in the e.motion proposal. The technological and mission challenges that need to be addressed in order to detect these signals are emphasized within the context of the scientific return. This analysis presents a broad perspective on the value and need for future satellite gravimetry missions.

show abstract

“…A second-order tensor field with 3 3 components, known as gravitational gradient tensor (GGT), is formed from these gravitational gradients. The three-axis GOCE gradiometer measures the diagonal components , , and one of the off-diagonal components with high precision, while the other off-diagonal components, and , are of low precision (Rummel et al, 2011). In the framework of High Level Processing Facility (HPF) for GOCE mission, three different approaches, namely time-wise, space-wise and direct approaches, are implemented to determine the gravity field from GOCE orbit and gradiometry data (Pail et al, 2011).…”

Section: Application Of the Rosborough Formulation In Goce Gradiometrmentioning

confidence: 99%

Rosborough Formulation in Satellite Gravity Gradiometry

Sharifi

Safari

Ghobadi‐Far

2013

Artificial Satellites

View full text Add to dashboard Cite

ABSTRACT. Following the launch of CHAMP, a new era was born in the gravity field determination from satellite observations. Many methods have been proposed and applied for the recovery of the Earth's gravity field from the observations of the satellite missions CHAMP, GRACE and GOCE. This paper deals with the Rosborough formulation in gravity field modelling. This formulation is derived from the transformation of time-wise representation from the orbital into the spherical coordinate systems. Base functions of the Rosborough formulation depend on the type of the functional of the gravity field and the inclination of the orbit. Unlike the space-wise approach, the Rosborough approach can easily deal with both isotropic and non-isotropic functionals. The proposed formulation is implemented on the GOCE data in order to show its efficiency. Numerical results show that the Rosborough formulation is a powerful and efficient tool in the case of GOCE gradiometry data processing.

show abstract

GOCE gravitational gradiometry

Cited by 249 publications

References 20 publications

Toward more complete magnetic gradiometry with the Swarm mission

Toward more complete magnetic gradiometry with the Swarm mission

Earth System Mass Transport Mission (e.motion): A Concept for Future Earth Gravity Field Measurements from Space

Rosborough Formulation in Satellite Gravity Gradiometry

Contact Info

Product

Resources

About