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:

1972-09-26

Pagination or Media Count:

94.0

Abstract:

The report is concerned with the study, design, and fabrication of a modulatordemodulator 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