Accession Number : AD0885735

Title :   Progress Report for January 1971 through March 1971 and for Contract Year September 1970 to August 1971.

Descriptive Note : Technical rept. no. 24,

Corporate Author : ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Personal Author(s) : Wood, W.

Report Date : JUN 1971

Pagination or Media Count : 46

Abstract : This report deals with six separate research tasks: (1) an interferometer type RDF system (2-32 MHz) for intermediate and long range use; (2) an investigation of a technique for predicting the effect of multi-mode propagation on the direction-of-arrival of radio waves; (3) a method of correcting the diurnal deviation of the direction-of-arrival radio waves; (4) a comparison of methods of computing the direction of arrival of radio waves; (5) a method of measuring the vertical angle-of-arrival of radio waves using a CDAA; (6) azimuthal measurement of the man-made and atmospheric noise levels. (Author)

Descriptors :   *DIRECTION FINDING), (*RADIO COMPASSES, (*ANTENNA ARRAYS, PHASED ARRAYS), (*POSITION FINDING, RADIO SIGNALS), RADIO INTERFEROMETERS, IONOSPHERIC PROPAGATION, DIURNAL VARIATIONS, ANGLE OF ARRIVAL, ATMOSPHERICS, ACCURACY, ERRORS, VERY LOW FREQUENCY.

Subject Categories : Electrical and Electronic Equipment
      Direction Finding
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE