Accession Number : AD0892316

Title :   Annual Report for Contract Year 1 September 1970 to 31 August 1971.

Descriptive Note : Technical rept. no. 29,

Corporate Author : ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Personal Author(s) : Wood, W.

Report Date : NOV 1971

Pagination or Media Count : 41

Abstract : This report covers the work which was performed during the 1970 - 1971 contract year. A comparison of the azimuthal resolution of a CDAA and an interferometer was made with good results. The effects of multipath propagation on direction of arrival of radio waves has been under investigation. A study of a technique for the correction of the diurnal deviation of radio waves has progressed. The measurement of the elevation angle of arrival using the phantom antenna has not produced the expected results. A study is under way to determine why these results are in error. A measurement of the levels of RF noise as a function of azimuth is in progress. Methods of automatic data acquisition and system calibration are of special interest. Other possible methods for the measurement of elevation angle of arrival using a CDAA are discussed. Service work performed for RADC during the past year is discussed.

Descriptors :   (*RADIO WAVES, ANGLE OF ARRIVAL), (*ANTENNA ARRAYS, ANTENNAS), IONOSPHERIC PROPAGATION, COMPUTER PROGRAMS, RADIO INTERFEROMETERS, DOPPLER EFFECT, POLARIZATION, IONOSPHERIC DISTURBANCES, AZIMUTH GATING, NOISE(RADIO), RADIOFREQUENCY, MULTIPATH TRANSMISSION, RESOLUTION, AZIMUTH, DIRECTION FINDING, DIURNAL VARIATIONS, ERRORS, RADIO TRANSMISSION.

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE