Special Study Group 3.186
Altimetry data processing for gravity, geoid and sea surface topography determination Chairman : Dr. C. Hwang List of papers published in the proceedings of international altimetry workshop on altimetry (available by order to Springer-Verlag in summer 2003) Publications of membersUseful references
International altimetry workshop
Since the Seasat mission of 1978, satellite altimetry has found its wide applications in geodesy, geophysics and oceanography. As new satellite missions such as GFO-1, ENVISAT JASON-1, and CRYOSAT will contribute more to the existing data sets of Seasat, Geosat, ERS-1/2, and TOPEX/POSEDION, these applications will continue to grow. But there are still many applications to be explored, many problems to be solved, and many data processing techniques to be improved. For example, coastal geoids, gravity anomalies tide models and bathymetry models derined from satellite altimetry have important engineering applications, which did not receive much attention in the past. But exploiting satellite altimetry in coastal areas requires much more sophisticated correction models and data processing techniques than in the open oceans. The data and coordinate systems of different satellite missions should be properly weighted/corrected and unified in order to obtain an optimal multi-satellite data set for subsequent analyses. Shipborne gravity data are abundant in many areas of the oceans, and have high quality and good spatial resolution. They should be combined with altimetry data for global gravity and geoid computation and estimation of high-degree geopotential model. Bathymetry model is an important element in, e.g., the general circulation model of the world oceans and the hydrodynamic tide model, and should be optimally derived with altimetry and other data. Eddies in coastal areas are associated with coastal upwellings, which are extremely important for marine production. Can altimetry be used to identify coastal eddies? How accurate should the altimeter measurement and the tide and geoid models be in order to do this? This SSG point outs selected problems of satellite altimetry as listed below to challenge all altimetric scientists. This SSG encourages members to tackle
the following problems:
Geosat ERS-1 TOPEX/POSEIDON GEOSAT-FOLLOW-ON JASON-1 ENVISAT CRYOSAT Geosat ERS-1 TOPEX/POSEIDON GEOSAT-FOLLOW-ON JASON-1 ENVISAT CRYOSAT
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