Accession Number : AD0760119

Title :   Measurements of Wind-Induced Doppler Shifts at 16 GHz over a Long Range Bistatic Scatter Link,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Olsen,R. L. ; Lammers,U. H. W.

Report Date : 30 APR 1973

Pagination or Media Count : 7

Abstract : The paper describes the use of Doppler shift measurements made with a narrow-beam forward scatter system operating at 16 GHz over a 500 km trans-horizon path to estimate average wind speeds in the upper troposphere. Estimated of average crosspath wind speeds are shown to compare favourably with corresponding radiosonde measurements. In contrast with the more limited capability of a radiosonde, a scatter system can rapidly map average crosspath and vertical wind speeds over large regions of the troposphere. The effect of certain abnormal propagation conditions on the ability to obtain average wind speeds from Doppler shift measurements is also demonstrated. (Author)

Descriptors :   (*RADIO TRANSMISSION, TROPOSPHERE), RADIO WAVES, DOPPLER EFFECT, FREQUENCY SHIFT, WIND, SUPERHIGH FREQUENCY

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE