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Using Swarm for Gravity Field Recovery: First Simulation Results

  • Xinxing WangEmail author
  • Reiner Rummel
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 137)

Abstract

The CHAMP satellite, equipped with a GPS receiver and an accelerometer, has yielded an enormous increase in accuracy of global satellite-only gravity field models and it has proved the concept of high-low satellite to satellite tracking (SST) for gravity field recovery. Therefore, we are interested whether the Swarm mission, consisting of three CHAMP-like satellites, is suitable for gravity field determination as well. This article presents the results of two simulation studies for static and time-variable gravity field recovery. The latter may become especially relevant after the mission end of GRACE and CHAMP. Swarm’s potential of recovering the global gravity field is investigated by simplified simulations. GPS baselines between the three satellites are used as observations. Generally, the quality of static field recovery can be better than that of CHAMP with the help of the more accurate GPS baseline measurements. A 24-months simulation with temporal variations shows that Swarm may have the potential of recovering the long wavelength part of hydrology signal.

Keywords

Swarm Gravity field recovery GPS baseline measurements temporal variation 

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Institute of Astronomical and Physical GeodesyTechnische Universität MünchenMunichGermany

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