GEOSAT altimeter data processing.
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概要
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U.S. Navy satellite GEOSAT provides a new data set of radar altimeter. It is the first satellite to measure the time variations of sea surface heights over a long time from a repeating orbit. Although a repeating orbit has a disadvantage in spatial resolution, it has some benefits as removing oceanographic variations, improving measurement accuracy and so on. Therefore, the GEOSAT data has been newly processed to obtain an altimetric geoid and gravity anomalies around Japan. As the GEOSAT mission will last at least for 1-2 years and the data has been accumulating, the obtained results are just preliminary ones. However the accuracy of the altimetric geoid has reached to ±20-30 cm, ignoring time invariant terms of sea surface topography.
- 日本測地学会の論文
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