Accession Number : ADA185931

Title :   Middle Atmospheric Wind Measurements Using a Medium Frequency Radar.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Coble, Barry B

PDF Url : ADA185931

Report Date : Jan 1987

Pagination or Media Count : 67

Abstract : The Imaging Middle-Atmospheric Geophysical Radar was located at the Boot Lake, Colorado, field site and operated at 2.66 megahertz to collect radar data. The data presented here were collected from 2120 Universal Time to 2310 Universal Time on March 20, 1983. It was operated as a Doppler interferometer to measure winds in the middle atmosphere (16.5 - 91.5 kilometers), which includes the stratosphere and the mesosphere. Highly specular returns were obtained in the lower regions of the middle atmosphere, with specularity increasing as altitude decreased. Algorithms wee developed to take these specular returns and derive useful wind speeds and directions in a region of the middle atmosphere, 30 - 55 kilometers, which had not previously yielded such information easily. Three-dimensional wind vectors were derived, and these values agreed well in direction, but overstated the magnitude when compared with rawinsonde data in the 16.5 - 30 kilometers region. The rawinsonde data were taken at Denver, Colorado, at time periods before and after the data run.

Descriptors :   *DOPPLER SYSTEMS, *INTERFEROMETERS, *MESOSPHERE, *RADAR, *STRATOSPHERE, ALGORITHMS, BOOTS, COLORADO, LAKES, MEASUREMENT, MEDIUM FREQUENCY, RADIOSONDES, SITES, TIME INTERVALS, WIND, WIND VELOCITY

Subject Categories : Active & Passive Radar Detection & Equipment
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE