Accession Number : AD0639295

Title :   THE AGREEMENT IN RANGE AND BEARING REPORTS FROM TWO VF RADAR REPEATERS TRACKING THE SAME TARGET SIMULTANEOUSLY WITH THE B-SCOPE.

Descriptive Note : Memorandum rept.

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD PSYCHOLOGICAL LAB

Personal Author(s) : Bartlett,N. R. ; Sweet,A. L.

Report Date : 20 FEB 1947

Pagination or Media Count : 13

Abstract : The error indices for stationary targets developed in this study agree generally with the error indices cited in the Preliminary Instruction Book for Navy Model VF indicating equipment. Fifty-six percent of the bearing reports from two VF repeaters were in exact agreement for a stationary target, and in no case was the disagreement greater than one degree. With respect to range reports, 19% were in exact agreement, 56% agreed within 20 yards, and all reports agreed within 100 yards. When contacts are moving, these data are not appropriate. For example, for targets with a relative speed of 80 knots, only 39% of the bearing reports were in exact agreement, and only 41% of the range readings agreed within 100 yards. The agreement between two VF reports decreases markedly as the speed of a target is increased. The reliability of a single report of the position of a contact depends then upon the relative motion of that contact with respect to the position of the radar. (Author)

Descriptors :   (*RADAR REPEATERS, ERRORS), RADAR TRACKING, RANGE FINDING, DIRECTION FINDING

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE