Accession Number : AD0753090

Title :   Development of a Forward Scatter Wideband Atmospheric Probing Technique.

Descriptive Note : Final rept. 16 Aug 71-14 Jun 72,

Corporate Author : SIGNATRON INC LEXINGTON MASS

Personal Author(s) : Getchell,Edward ; Alexander,Peter ; Mahoney,Paul ; Nilssen,Helge ; Salwen,Howard

Report Date : 26 SEP 1972

Pagination or Media Count : 94

Abstract : The report is concerned with the study, design, and fabrication of a modulator/demodulator suitable for probing and analyzing a forward scatter path at 15 GHz to determine clear air turbulence (CAT) in the common volume. The equipment is called wideband prober-analyzer. The prober part at the transmitter consists of a Gunn Source and a modulator generating a biphase signal switched at the maximum rate of 12.5 Mbps. The analyzer part at the receiver site performas on-line processing to permit real-time measurement of forward-scattered power, Doppler offset and Doppler RMS spread as a function of signal delay. Direct display of amplitude and drequency information is provided. (Author)

Descriptors :   (*CLEAR AIR TURBULENCE, TEST EQUIPMENT), (*ATMOSPHERIC SOUNDING, CLEAR AIR TURBULENCE), MODULATORS, DEMODULATORS, SCATTERING, DOPPLER EFFECT, MICROWAVE FREQUENCY, POWER SPECTRA, AVIATION SAFETY, REAL TIME

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE