A mathematical transform, called the Rosette Transform, together with a new method, called the Dense Sampling Method, have been developed. The Rosette Transform is invented to apply to both the mean part and the fluctuating part of a targeted radar signature using the Dense Sampling Method to construct the data in a high-resolution grid at 1-km posting for wind measurements over water surfaces such as oceans or lakes.

This new technique enables the use of NASA satellite scatterometer data, such as QuikSCAT data, which have been collected globally over a decade for measuring high-resolution wind field at 1-km posting on water surfaces. Valid in nearshore waters (10–15 km from shore), the high-resolution wind data are unique and critical to calculate accurate wind power density and its variability for the development of future offshore wind farms. The new technique was originally developed to monitor urban and suburban environments, and it has been applied to obtain high-resolution radar signatures over ocean and lake environments for high-resolution wind measurements.

This work was done by Son V. Nghiem and Gregory Neumann of Caltech for NASA’s Jet Propulsion Laboratory. For more information, contact This email address is being protected from spambots. You need JavaScript enabled to view it..

In accordance with Public Law 96-517, the contractor has elected to retain title to this invention. Inquiries concerning rights for its commercial use should be addressed to:

Innovative Technology Assets Management JPL Mail Stop 202-233 4800 Oak Grove Drive
Pasadena, CA 91109-8099
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Refer to NPO-46909.

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.