SASS wind ambiguity removal by direct minimization ( North Atlantic).

Abstract

A gridded surface wind analysis is obtained by minimizing an objective function, the magnitude of which measures the error made by the gridded analysis in fitting the SASS wind data, the conventional surface wind observations and the forecast surface wind field. The ambiguity of the SASS winds is then removed by choosing the alias closest to the analyzed wind. Illustrative results are shown for a limited region in the N Atlantic containing the QE II storm and for a limited amount (approx. 12 min) of data observed near the synoptic time 1200 GMT 10 Sept 1978.-from Author