Optimizing sigma0 Information From the Jason-2 Altimeter

Author
Keywords
Abstract
A radar altimeter\textquoterights normalized backscatter, sigma 0 , is used in many oceanographic applications to infer values of wind speed, wind stress, rain rate, and the presence of biogenic slicks. The waveform retracker used to estimate the key geophysical variables for the altimeters on the Jason-1 and Jason-2 satellites shows increased small-scale variability since the problem is ill-conditioned. A simple empirical adjustment to sigma 0 improves the separability between various parameters and also improves the along-track profiles of sigma 0 . This leads to the following: 1) more realistic wind fields; 2) better discrimination of rain events; and 3) improved comparison between the Jason-1 and Jason-2 altimeters during their tandem mission.
Year of Publication
2009
Journal
IEEE Geoscience and Remote Sensing Letters
Volume
6
Number of Pages
398
Date Published
07/2009
DOI
10.1109/LGRS.2009.2013973