Effects of Atmospheric Variations on the Marine Geoid Determined by Forthcoming Gravity Satellite

The Gravity Recovery And Climate Experience (GRACE) satellite will detect seasonal variations of gravity with very high accuracy. A prospective follow-on of the GRACE would be the Satellite-to-Satellite laser Interferometry (SSI). To make use of the highly accurate measurements of seasonal gravity expected from these satellites, beyond the measurement errors it is important to consider the error sources affecting particularly the seasonal frequency. In this study two errors were attempted to be modeled: the short-period aliasing effect and the effect of the oceanic response to atmosphere. The results show that these phenomena should notably affect the ability of the satellites.