Accession Number : ADA184837

Title :   An Investigation of Millimeter Wave Propagation in the Atmosphere: Measurement Program.

Descriptive Note : Final rept. 21 Sep 81-31 Mar 87,

Corporate Author : GEORGIA TECH RESEARCH INST ATLANTA

Personal Author(s) : McMillan, R W ; Bohlander, R A

PDF Url : ADA184837

Report Date : 17 Jun 1987

Pagination or Media Count : 188

Abstract : This report describes work done on Contract DAAG29-81-K-0173, An Investigation of Millimeter Wave Propagation in the Atmosphere: Measurement Program, conducted by the Georgia Tech Research Institute during the period September 1981 through May 1987. The objective of this program was to measure the effects of atmospheric turbulence on the propagation of millimeter wave radiation, with emphasis on inclement weather effects. Five separate measurement sessions were conducted at a site near Urbana, Illinois, and these measurements were made jointly with personnel from the National Oceanic and Atmospheric Administration, who furnished meteorological instrumentation and information on experiment design. Personnel from the Atmospheric Sciences Laboratory at White Sands Missile Range also contributed to this program. Measurements were made at frequencies near 118, 142, 173, and 230 GHz to cover all of the major atmospheric features in the millimeter wave spectral range, and were made during clear air, rain, fog, and snow. The equipment comprised a small step-van transmitter truck and an array of four receivers, pumped by a common local oscillator, mounted in a semi-trailer.

Descriptors :   *ELECTROMAGNETIC WAVE PROPAGATION, *ATMOSPHERIC MOTION, *ATMOSPHERIC REFRACTION, *MILLIMETER WAVES, TURBULENCE, MEASUREMENT, THEORY, USSR, PHASE SHIFT, INTENSITY, AMPLITUDE MODULATION, REFRACTIVE INDEX, CORNER REFLECTORS

Subject Categories : Radiofrequency Wave Propagation
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE