Unified Land–Ocean Quasi-Geoid Computation from Heterogeneous Data Sets Based on Radial Basis Functions

The determination of the land geoid and marine involves different data sets calculation strategies. It is a hot issue at present to construct unified land–ocean quasi-geoid by fusing multi-source in coastal areas, which great significance construction integration. Classical integral algorithms such as Stokes theory find it difficult deal with heterogeneous gravity signals, so scholars have gradually begun using radial basis functions (RBFs) fuse data. This article designs multi-layer RBF network measured terrestrial, shipborne, satellite altimetry airborne based on Remove–Compute–Restore (RCR) technique. EIGEN-6C4 degree 2190 used reference field. Several core problems process modeling are studied depth: (1) behavior RBFs spatial domain; (2) locations RBFs; (3) ill-conditioned design matrix; (4) effect terrain masses. local 1′ resolution calculated, respectively, flat east coast rugged west United States. results show that accuracy computed four types experimental area 1.9 cm inland 1.3 after internal verification (the standard deviation w.r.t GPS/leveling data). calculated 2.2 2.1 coast. indicate calculate from has important application value.