Accession Number:

AD0839113

Title:

AIRBORNE TARGET RECOGNITION STUDY.

Descriptive Note:

Quarterly rept. no. 9, 1 Apr-30 Jun 68,

Corporate Author:

CONDUCTRON CORP ANN ARBOR MI

Personal Author(s):

• Green, J. A.
• Antoniou, M. I.

Report Date:

1968-07-01

Pagination or Media Count:

41.0

Abstract:

A primary goal of the current program is an evaluation of radiometric target detection capability in comparison to that of an active radar system. To permit such evaluation, the present report examines the statistics of fluctuations in the apparent background temperature using two complementary approaches. Through use of a specular reflection model for homogenous terrain, a physical approach yields temperature probability distributions that are derived as functions of 1 variations in the index of refraction, and 2 the local tilt angle of the terrain. A mathematical modelling method results in calculable distributions when inhomogenous terrain is represented by a two dimensional random telegraphers signal. Also covered are the characteristics of certain special configurations and processing techniques. Basically beam sharpening operations, the use of these configurations is motivated by the need to provide improved target-background discriminations in a necessarily low resolution radiometer system. Author

Descriptors:

• *TARGET RECOGNITION
• RADIOMETERS
• COMBAT SURVEILLANCE
• DETECTORS
• TERRAIN MODELS
• SKY
• TEMPERATURE
• CONFIGURATIONS
• DELAY CIRCUITS
• PROBABILITY
• RESOLUTION
• REFRACTIVE INDEX
• BACKGROUND
• TARGET ANGLE

Subject Categories:

• Test Facilities, Equipment and Methods
• Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE