题  目：Development of a Satellite Orbit Simulation Toolkit for Future Geodesy Missions

报告人：Vitali Mueller
　　　　　  (Albert-Einstein-Institute (AEI), Hannover, Germany)

摘　要：The GRACE (Gravity Recovery and Climate Experiment) satellite pair was launched in 2002 to etermine Earths gravitational field by measuring the inter-satellite distance with a K-Band microwave ranging system. The GOCE satellite, equipped with sensitive gradiometer and injected into orbit in March 2009, is another milestone in Earth observation mission. A future geodesy mission could use a laser based inter-satellite link to improve the ranging precision, so recently the Albert-Einstein-Institute began to design a laser interferometer aiming for an accuracy of about 50 nm/sqrt(Hz). Furthermore an Orbit Simulation Toolkit was developed, to provide parameter like Doppler shifts in laser frequency induced by the relative satellite velocity.

In this talk I will present my work on satellite orbit simulations. Next to the extent of the simulator, which supports various perturbation effects like drag and solar radiation pressure, I will present actual methods to model Earths Gravity field precisely. Furthermore I will describe applications and show simulation results, obtained with the simulator.

时  间：2011年3月1日（星期二）上午11:00

地  点：（北京西路2号）紫台大楼327教室

欢迎大家积极参与！

　　　　　　　　　　　　　　　　　　　  紫金山天文台学术委员会学术交流工作委员会

关于报告人所在研究所介绍：

The key research activities of the Albert-Einstein-Institute, Institutefor Gravitational Physics of the Leibniz University Hannover, Germany, are:

* space-borne gravitational wave detector LISA (Laser Interferomter Space Antenna)

* LISA Pathfinder

* Data analysis

* ground-based gravitational wave detector GEO600

* Quantum Optics: Squeezed Light

* Next Generation Geodesy Missions using Laser Interferometer

关于报告人介绍：

Vitali Mueller

2007-2010: bachelor student, Physics, at the Leibniz University Hannover, Germany

since 2008: student assistant at the AEI

since 2010: Master/PhD student at the AEI

expertise: satellite orbit simulations