Difference between pages "IC SG4" and "IC SG5"
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(Difference between pages)
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− | <big>''' | + | <big>'''Satellite gravity theory'''</big> |
− | Chair:''T. | + | Chair: ''T. Mayer-Gürr (Germany)''<br> |
− | Affiliation:'' | + | Affiliation: ''Comm. 2'' |
__TOC__ | __TOC__ | ||
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− | |||
− | |||
− | |||
− | |||
− | |||
===Objectives=== | ===Objectives=== | ||
− | * | + | * Gravity field estimation |
− | * | + | ** Perturbation techniques versus in-situ measurements and new aproaches like short-arc integration, energy balance and so on. |
− | * | + | ** Computational problems related to the huge quantities of data. Algorithms to divide the computational tasks to run on massive parallel systems. |
− | * | + | * Noise and error treatment |
+ | ** Estimating the variance-covariance matrices of the observations, filtering techniques. | ||
+ | ** Integrated analysis of different sensors featuring individual noise characteristics (like Accelerometer and K-band sensor in case of GRACE), calibration of instruments (internal and external). | ||
+ | ** A-posteriori variance-covariance matrices, error propagation, validation. | ||
+ | ** Space-time resolution, de-aliasing. Which signals can be estimated and which must be modeled? | ||
+ | * Gravity field modeling | ||
+ | ** Choice of basis functions in time and space (with respect to applications in hydrology, oceanography). | ||
+ | ** Global and regional modeling, modeling in terms of gravity sources (mass variations). | ||
+ | ** Reference systems and datum problems (origin, orientation, static and temporal datum systems for gravity field changes). | ||
+ | * Aspects of data combination | ||
+ | ** Combination of the satellite gravity missions (CHAMP, GRACE and GOCE) with terrestrial and aerial gravity information. | ||
+ | ** Combination at the data level versus combination of results. | ||
+ | ** A-priori information from non-gravity data such as changes in the geometry of the Earth and its rotation. | ||
+ | ** Unified approaches: Joint analysis of gravity field observations, Earth rotation, and geometry changes. | ||
+ | * Future satellite missions | ||
+ | ** Theory of new observation types and intruments. | ||
+ | ** Formation flights. Investigation into stability of satellite formations and their sensitivity to aliasing errors. | ||
+ | ** Follow-on gravity field missions. | ||
+ | ** Orbit determination: theory, perturbation techniques, stability problems. | ||
+ | ** Challenges caused by the inceasing accuracy of the observations: integration techniques, numerical problems due to limited digits in computation. | ||
− | ===Program of | + | ===Program of activities=== |
− | * | + | * Email:<br /> Internal email discussions |
− | * | + | * Meeting:<br /> Organization of working group meeting at larger meetings. |
− | + | * Website:<br /> Launch of a website for communications, informations and links to data sources | |
− | * | + | * Simulation data:<br /> Assemble of a simulated data set with orbits, background models and artificial noise. This data set serves to test new algorithms and make different aproaches comparable. |
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− | * | ||
− | === | + | ===Membership=== |
− | '' ''' | + | '' '''Torsten Mayer-Guerr (Germany)'''<br /> Oliver Baur (Germany)<br /> Wolfgang Bosch (Germany)<br /> Pavel Ditmar (Netherlands)<br /> Thomas Gruber (Germany)<br /> Shin-Chan Han (USA)<br /> Michael Kern (Netherlands)<br /> Juergen Kusche (Germany)<br /> Michael Schmidt (Germany)<br /> Roland Schmidt (Germany)<br /> Roland Pail (Austria)<br /> Insa Wolf (Germany)<br />'' |
Revision as of 13:52, 22 April 2008
Satellite gravity theory
Chair: T. Mayer-Gürr (Germany)
Affiliation: Comm. 2
Objectives
- Gravity field estimation
- Perturbation techniques versus in-situ measurements and new aproaches like short-arc integration, energy balance and so on.
- Computational problems related to the huge quantities of data. Algorithms to divide the computational tasks to run on massive parallel systems.
- Noise and error treatment
- Estimating the variance-covariance matrices of the observations, filtering techniques.
- Integrated analysis of different sensors featuring individual noise characteristics (like Accelerometer and K-band sensor in case of GRACE), calibration of instruments (internal and external).
- A-posteriori variance-covariance matrices, error propagation, validation.
- Space-time resolution, de-aliasing. Which signals can be estimated and which must be modeled?
- Gravity field modeling
- Choice of basis functions in time and space (with respect to applications in hydrology, oceanography).
- Global and regional modeling, modeling in terms of gravity sources (mass variations).
- Reference systems and datum problems (origin, orientation, static and temporal datum systems for gravity field changes).
- Aspects of data combination
- Combination of the satellite gravity missions (CHAMP, GRACE and GOCE) with terrestrial and aerial gravity information.
- Combination at the data level versus combination of results.
- A-priori information from non-gravity data such as changes in the geometry of the Earth and its rotation.
- Unified approaches: Joint analysis of gravity field observations, Earth rotation, and geometry changes.
- Future satellite missions
- Theory of new observation types and intruments.
- Formation flights. Investigation into stability of satellite formations and their sensitivity to aliasing errors.
- Follow-on gravity field missions.
- Orbit determination: theory, perturbation techniques, stability problems.
- Challenges caused by the inceasing accuracy of the observations: integration techniques, numerical problems due to limited digits in computation.
Program of activities
- Email:
Internal email discussions - Meeting:
Organization of working group meeting at larger meetings. - Website:
Launch of a website for communications, informations and links to data sources - Simulation data:
Assemble of a simulated data set with orbits, background models and artificial noise. This data set serves to test new algorithms and make different aproaches comparable.
Membership
Torsten Mayer-Guerr (Germany)
Oliver Baur (Germany)
Wolfgang Bosch (Germany)
Pavel Ditmar (Netherlands)
Thomas Gruber (Germany)
Shin-Chan Han (USA)
Michael Kern (Netherlands)
Juergen Kusche (Germany)
Michael Schmidt (Germany)
Roland Schmidt (Germany)
Roland Pail (Austria)
Insa Wolf (Germany)