Accession Number : AD0709233

Title :   STUDY OF METEOR WIND MEASUREMENT TECHNIQUES. VOLUME II.

Descriptive Note : Final rept. 1 Jun 63-31 May 66,

Corporate Author : SMITHSONIAN ASTROPHYSICAL OBSERVATORY CAMBRIDGE MASS

Personal Author(s) : Deegan,Norman F. ; Fitzpatrick,Robert J. ; Forti,Giuseppe ; Grossi,Mario D. ; Schaffner,Mario R.

Report Date : FEB 1970

Pagination or Media Count : 241

Abstract : Wind data in the height range 80 to 100 km can be obtained with a multistatic VHF phase-coherent pulse-doppler meteor radar capable of monitoring a volume in space measuring arrpoximately 50 km x 50 km horizontally, and 20 km vertically. An eight-station phase-coherent system has been established for this purpose near Havana, Illinois, by reworking an existing six-station, incoherent, pulse meteor radar operating at 40.92 MHz. A 4-Mw transmitter and eight receiving sites dispersed up to 50 km away from the transmitter site have been locked together in phase within a few parts in 10 to the 10th power by distributing a 2.5 kHz reference tone via commercial telephone lines. The system operates satisfactorily and is capable of collecting enough range-doppler samples from meteor trails for an adequate description of the wind pattern at meteor heights. Wind profiles have been obtained by processing in Cambridge with a CDC-6400 computer the multichannel digital tapes recorded in Havana. The method can, potentially, be used for real-time wind measurements. It competes favorably with alternative approaches when wind measurements at meteor height must be performed with continuity and without resorting to horizon-to-horizon spatial averaging. (Author)

Descriptors :   (*UPPER ATMOSPHERE, WIND), (*METEORS, RADAR CROSS SECTIONS), COMPUTER PROGRAMS, INSTRUCTION MANUALS, RADIO ASTRONOMY, FLOW CHARTING, MAGNETIC TAPE, PUNCHED CARDS, PATTERN RECOGNITION, PULSE ANALYZERS, CALIBRATION, RADAR SIGNALS, DOPPLER RADAR

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE