RADIOMETRIC DETECTION OF OIL SLICKS

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Abstract:

A study has been performed to assess the feasibility of using microwave radiometry for detection of oil pollution. The investigation stems from the U.S. Coast Guards requirement for an airborne surveillance system which can detect oil pollution during inclement weather and during the hours of darkness. Laboratory and airborne measurements were made of a variety of oil base pollutants. Laboratory investigations included microwave response as a function of oil film thickness, physical temperature of the oil-water system, pollutant type sensor wavelength, antenna polarization, and observation angle. These studies consisted of dual-polarization radiometric measurements observational wavelengths of 0.8cm and 2.2cm of Bunker C fuel oil, gasoline, and 20, 30, and 40 API gravity crude oil. The dielectric properties of these pollutants were also measured by means of a 0.81 cm ellipsometer. The results of the laboratory measurements were used to select the most suitable microwave radiometer for the airborne measurements. The airborne measurements were of small oil slicks on the open ocean off the Southern California Coast. Measurements were made from an aircraft instrumented with a dual-polarized 0.81 cm radiometer oriented with a forward antenna viewing angle of 45 deg from nadir. Pollutants examined during the tests include marine diesel fuel 20, 30, and 40 API gravity crude oils and a mixture of diesel fuel and 20-gravity oil. Measurements were made under various atmospheric and low sea state conditions, including several at night.

Author(s):
Edgerton, A. T. ; Trexler, D. T.
Author Organization(s):
AEROJET-GENERAL CORP EL MONTE CA
Descriptive Note:
Final rept. 14 Mar-26 Oct 1969
Pagination:
0130

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AGC-SD-1335-1
Contract/Grant Number(s):
DOT-CG-93228-A
Monitor Series:
USCG
 Subject Terms
Joint Capability Areas:
JCA_2_Battlespace Awareness; JCA_2.1_Planning and Direction; JCA_2.1.1_Define and Prioritize Requirements; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_1.4.2_Health Service Delivery; JCA_1.4_Force Support; JCA_1.2.7_Experimentation; JCA_6_Net Centric; JCA_5_Command and Control; JCA_6.1.3_Switching and Routing; JCA_1.2.5_Lessons Learned; JCA_4.1_Deployment and Distribution; JCA_6.3.3_Spectrum Management; JCA_5.3_Planning; JCA_6.1_Information Transport; JCA_6.3_Net Management
Communities of Interest:
Advanced Electronics
Descriptor(s):
*AERIAL RECONNAISSANCE, *PETROLEUM PRODUCTS, *RADIOMETERS, *WATER POLLUTION, DETECTORS, FUEL OIL, HYDROCARBONS, SPECTRUM SIGNATURES
Field(s)/Group(s):
Test Facilities, Equipment and Methods, Water Pollution and Control
Keyword(s):
MICROWAVE RADIOMETRY, *OILS, *POLLUTION, *OILS, *WATER POLLUTION, *REMOTE SENSING
Report Date:
1970 Jan 01