Global marine gravity anomalies from Seasat,Geosat,ERS-1,TOPEX/POSEIDON satellite altimetry
碩士 === 國立交通大學 === 土木工程學系 === 85 === Global marine gravity anomalies at a 2'x2'grid have been determined fromSe asat﹑Geosat﹑ERS-1 and TOPEX/POSEIDON altimeter data. The inverse VeningMeine sz formula with an 1D FFT method was used to compute...
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| Format: | Others |
| Language: | zh-TW |
| Online Access: | http://ndltd.ncl.edu.tw/handle/65379738807251509118 |
| Summary: | 碩士 === 國立交通大學 === 土木工程學系 === 85 === Global marine gravity anomalies at a 2'x2'grid have been determined fromSe
asat﹑Geosat﹑ERS-1 and TOPEX/POSEIDON altimeter data. The inverse VeningMeine
sz formula with an 1D FFT method was used to compute gravity anomaliesfrom gri
dded north-south and west-east geoid gradients, in a remove-restoreprocedure w
ith the EGM96 gravity model as the reference field. The data coverthe area 0°
to 360° in longitude and 72°S to 72°N in latitude. In the 12 test areas
where ship gravity and satellite-derived gravitywere compared, rms agreements
of 6-10 mgals were obtained and the gravityanomalies derived in this work are
0.5 mgal on average better than thosederived by Sandwell and Smith (1997). Th
e gravity anomalies are locatedat an ftp site (ftp://gps.cv.nctu.edu.tw) where
an application program isavailable for extracting data in a subarea.
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