Accession Number:

AD0630249

Title:

MICROWAVE POINTING VARIATIONS AND ANGLE MEASUREMENTS,

Descriptive Note:

Corporate Author:

ARMY ENGINEER GEODESY INTELLIGENCE AND MAPPING RESEARCH AND DEVELOPMENT AGENCY FORT BELVOIR VA

Personal Author(s):

Report Date:

1966-01-01

Pagination or Media Count:

47.0

Abstract:

Tests were performed to obtain simultaneous data pertaining to the long-term and short-term signal angle-of-arrival variations at 9.4, 18.8, and 35 Gcs frequencies being transmitted over the same path as detected by three existing systems and to perform angle determinations using the 35 Gcs system. Analyses of data indicate that the short-term variations are greater with the 35 Gcs system than with the 18.8 Gcs system, but are more symmetrical about the long-term mean that the long-term variations are shortest with the 35 Gcs system that both short-term and long-term variations with the 9.4 Gcs system are much greater than the other systems and that angle determinations within a few arc seconds are achievable when the 35 Gcs interferometer is used. Some correlation with temperature is indicated, and an explanation for the cause of short-term effects and the relative influence of long-term variations on the angle measurements is discussed. No explanation is offered for the apparent reduced sensitivity of the higher frequency systems to either long-term variations or atmospheric parameters. Author

Subject Categories:

  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE