IMPROVED SMOOTHING OF AN ALTIMETRIC OCEAN-TIDE MODEL WITH GLOBAL PROUDMAN FUNCTIONS

Authors
RAY RD SANCHEZ BV
Citation
Rd. Ray et Bv. Sanchez, IMPROVED SMOOTHING OF AN ALTIMETRIC OCEAN-TIDE MODEL WITH GLOBAL PROUDMAN FUNCTIONS, Geophysical journal international, 118(3), 1994, pp. 788-794
Citations number
11
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Geophysical journal international → ACNP
ISSN journal
0956540X
Volume
118
Issue
3
Year of publication
1994
Pages
788 - 794
Database
ISI
SICI code
0956-540X(1994)118:3<788:ISOAAO>2.0.ZU;2-U
Abstract
A set of global Proudman functions, computed on a 2 degrees finite-dif ference grid, is used to smooth raw tidal estimates previously derived by Cartwright and Ray from a two-year analysis of Geosat altimeter da ta. The least-squares problem provides an interesting application of r idge regression and Hansen's L-curve analysis. The final smoothed maps are found to agree more closely to a set of 80 'ground-truth' constan ts than did the original tidal models.