作者: B. D. Tapley , R. S. Nerem , C. K. Shum , J. C. Ries , D. N. Yuan
关键词: Gravitational field 、 Ocean surface topography 、 Position (vector) 、 Geoid 、 Geology 、 Geophysics 、 Altimeter 、 Satellite 、 Geodesy 、 Orbit (dynamics) 、 Ocean current
摘要: With the development of satellite altimetry, it is possible to infer geostrophic velocity surface ocean currents, if geoid and position are known accurately. Errors in current models orbit computations, both due primarily errors Earth's gravity field model, have limited use altimeter data for this purpose. The objective investigation demonstrate that can be used a joint solution simultaneously estimate quasi-stationary sea topography, ζ, model field. Satellite tracking from twelve satellites were along with Seasat solution. estimated ζ compares well at long wavelengths hydrographic ζ. Covariance analysis indicates separable up degree 9, which point error comparable signal