Accession Number : AD0801857

Title :   A STUDY OF THE EFFECTS OF SYSTEMATIC ERRORS IN THE WULLENWEBER DIRECTION FINDING SYSTEM.

Descriptive Note : Technical rept.,

Corporate Author : ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Personal Author(s) : Jones, E. C., Jr. ; Ernst, E. W.

Report Date : OCT 1966

Pagination or Media Count : 31

Abstract : Through the technique of digital simulation, the effects of certain systematic errors in the components of a Wullenweber direction finding system on the accuracy of bearings determined with this system are studied. Specifically, the errors considered include the complete elimination of one cable, a phase change of 180 degrees in one cable, and a sinusoidal distribution of phase errors in the cables of one quadrant of the system. It is shown that these errors are relatively small for signals whose elevation angle of arrival is close to the cophasal angle of the antenna scanner, but that the errors increase significantly at higher elevation angles and higher frequencies.

Descriptors :   (*DIRECTION FINDING, ERRORS), (*SIMULATION, DIRECTION FINDING), (*RADIO EQUIPMENT, DIRECTION FINDING), DIGITAL COMPUTERS, ANTENNAS, ANGLE OF ARRIVAL, FREQUENCY, PHASE SHIFT CIRCUITS, DIGITAL SYSTEMS, ELECTRIC CABLES, DISTRIBUTION.

Subject Categories : Direction Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE