14 Result(s)
within
K.H. Ilk
Earth Sciences
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Living Reference Work Entry In depth
Satellitengravimetrie
In der zweiten Hälfte des zwanzigsten Jahrhunderts hatte sich der Forschungsbereich der Geodäsie als der Wissenschaft von der Ausmessung und Abbildung der Erde auf dramatische Art und Weise verändert. Dies wur...
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Chapter and Conference Paper
Pure Geometrical Precise Orbit Determination of a LEO Based on GNSS Carrier Phase Observations
The interest in a precise orbit determination of Low Earth Orbiters (LEOs) especially in pure geometrical mode using Global Navigation Satellite System (GNSS) observations has been rapidly grown. Conventional ...
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Chapter and Conference Paper
A New Approach for Pure Kinematical and Reduced-Kinematical Determination of LEO Orbit Based on GNSS Observations
The geometrical point-wise satellite positions of a Low Earth Orbiter (LEO) equipped with a Global Navigation Satellite System (GNSS) receiver can be derived by GNSS analysis techniques based on hl-SST (high-l...
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Chapter
Understanding a dynamic planet: Earth science requirements for geodesy
The complexity of the Earth system has been discussed in many fundamental documents in recent years. Trying to understand the Earth system and improve our forecast capability step by step are the great challen...
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Article
Far-zone effects for different topographic-compensation models based on a spherical harmonic expansion of the topography
The determination of the gravimetric geoid is based on the magnitude of gravity observed at the surface of the Earth or at airborne altitude. To apply the Stokes’s or Hotine’s formulae at the geoid, the potent...
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Chapter
A Validation Procedure for Satellite Orbits and Force Function Models Based on a New Balance Equation Approach
Since the availability of CHAMP and GRACE data, the energy approach has become an important tool for the recovery of the gravity field based on continuously observed satellite orbits. Up to now, only the total...
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Chapter
Global gravity field recovery by merging regional focusing patches: an integrated approach
Usually the gravity potential is modelled by a spherical harmonic expansion. Simulation tests and real-data investigations based on POD (precise orbit determination) and SST (satellite-to-satellite tracking) d...
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Article
ITG-CHAMP01: a CHAMP gravity field model from short kinematic arcs over a one-year observation period
Global gravity field models have been determined based on kinematic orbits covering an observation period of one year beginning from March 2002. Three different models have been derived up to a maximum degree of
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Chapter and Conference Paper
The Use of Energy Balance Relations for Validation of Gravity Field Models and Orbit Determination Results
There is a need for a proper validation procedure of gravity field solutions, especially for those high precise ones which are derived from the dedicated gravity field missions as CHAMP, GRACE and in future GO...
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Chapter and Conference Paper
Gravity Field Recovery and Validation by Analysis of Short Arcs of a Satellite-to-Satellite Tracking Experiment as CHAMP and GRACE
A procedure for gravity field determination is presented based on the analysis of short arcs of low flying satellites as CHAMP and GRACE. The analysis technique can be applied to high-low as well as to low-low...
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Chapter and Conference Paper
Global Gravity Field Solutions Based on a Simulation Scenario of GRACE SST Data and Regional Refinements by GOCE SGG Observations
GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) has the potential of deriving the global gravity field with unprecedented accuracy in the high resolution spectral part. The usual way is to mod...
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Chapter and Conference Paper
Envisaging a new era of gravity field research
The investigation of the Earth’s gravity field will enter a new era at the turn of the forthcoming millenium. Despite the fact that a remarkable improvement of our knowledge of the gravity field has been achie...
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Chapter and Conference Paper
Application of Spherical Wavelets for Regional Gravity Field Recovery — A Comparative Study
This paper is related to the application of spherical wavelets for gravity field recovery from SST/SGG-observations. The questions of geographical truncation and spatial resolution are studied, important for a...
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Chapter and Conference Paper
Satellite gravity gradiometry: A future technique for global high resolution gravity field recovery
One future possibility for obtaining improved high resolution gravity field information, besides the competitive technique of satellite-to-satellite tracking, is satellite gravity gradiometry. In this paper th...
