Special Operations Command and Control Element (SOCCE) Preliminary Analysis of Equipment and Personnel Requirements for the Digitized Battlefield

Report No. ARL-TN-136
Authors: Malkin, Frank J.; Graybill, Stephen
Date/Pages: April 1999; 47 pages
Abstract: The Special Sensor Microwave Imager (SSM/I) is capable of mapping sea surface roughness characteristics and sea foam coverage from space in most weather conditions. The SSM/I also measures precipitation and water vapor content of atmosphere, providing a simultaneous weather analysis complementing the sea surface roughness measurements. This combination of measurements can provide input into numerical models of sound transmission in the ocean, particularly those incorporating forward scattering from the sea surface, absorption by bubbles, and the generation of noise by wind. This technical note presents a demonstration of these capabilities for the month of April 1991 Gulf of Alaska. An algorithm is applied to several SSM/I passes to produce maps of root mean square wave slope, percent sea foam coverage, precipitation, and water vapor. Two wind events are treated that were associated with the passage of low pressure systems into the gulf from the southwest. A method of driving significant wave height from wave slope variance, using independent estimates of the dominant wavelength, is also presented.
Distribution: Approved for public release
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Last Update / Reviewed: April 1, 1999