Accession Number : ADA318271

Title :   A Prediction of 94-GHz Radiometer Performance in Various Environmental Conditions for Army Applications.

Descriptive Note : Final rept.,

Corporate Author : ARMY RESEARCH LAB ADELPHI MD

Personal Author(s) : Wikner, David

PDF Url : ADA318271

Report Date : SEP 1996

Pagination or Media Count : 26

Abstract : A prediction of 94-GHz imaging radiometer performance is made for three military scenarios in a variety of weather conditions. The scenarios considered are a ground-to-ground and an air-to-ground tank-sized target detection scenario and an aircraft landing-aid scenario. Simple models of atmospheric signal attenuation are used to calculate the scene temperature that would be present at a sensor with a 3- by 3-ft square antenna at ranges of 500 to 5000 m. This information is used to determine the range at which scene imaging or target detection is no longer possible. It is shown that, in scenarios where tank-sized targets are involved, spatial resolution usually limits system performance before most environmental conditions do. The only exception to this is in cases of moderate and heavy rain, where the signal attenuation is quite large. Given a sensor of sufficient temperature resolution, the landing-aid scenario is shown to be a reasonable scenario, especially in foggy conditions.

Descriptors :   *RADAR IMAGES, *IDENTIFICATION SYSTEMS, *RADIOMETERS, *TARGET DETECTION, SPATIAL DISTRIBUTION, TEMPERATURE, PASSIVE SYSTEMS, RAIN, FOG, SIGNALS, LANDING AIDS, ARMY, ATMOSPHERIC ATTENUATION, ALL WEATHER, THERMAL RADIATION.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE