Accession Number:

AD0728551

Title:

Microwave Radiometric Detection of Oil Slicks.

Descriptive Note:

Rep. no. 2 (Final), 12 Jun 70-28 Feb 71,

Corporate Author:

AEROJET-GENERAL CORP EL MONTE CALIF MICROWAVE DIV

Report Date:

1971-03-01

Pagination or Media Count:

72.0

Abstract:

Two years of research have been conducted to determine the feasibility of using microwave radiometry for the detection, identification, and surveillance of oil pollution. Theoretical studies consisted of a review of contemporary theory concerning parameters that influence microwave emission from both unpolluted and oil-covered seas. Laboratory investigations confirm results obtained from earlier studies and established the response characteristics of the 3.2-mm sensor to continuous oil films. Airborne measurements of controlled spills off the Southern California Coast were performed with dual-polarized 3.2- and 8.1-mm sensors oriented with a forward antenna viewing angle 45 deg above nadir. Four sets of oil spills, or missions, were performed to obtain data over a variety of sea-surface conditions. Pollutants used for the tests included No. 2 diesel fuel, 26.1 and 21.6 API gravity crude oils, and 9.7 API gravity fuel oil. Significant microwave brightness temperature oil slick signatures were noted for a wide range of ocean conditions sea states 1-4 and oil film thickness thickness 1 micron and greater. Based on the experimental results a passive microwave imaging system configuration has been recommended for oil pollution surveillance. Author

Subject Categories:

  • Water Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE