COHERENT DOPPLER SODAR SONDE R AND D

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$307,000.00
Award Year:
1986
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
2344
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Daubin Systems Corp.
104 Crandon Blvd - Ste 315, Key Biscayne, FL, 33149
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Scott C Daubin
(305) 361-2249
Business Contact:
() -
Research Institution:
n/a
Abstract
AN IMPROVED ACOUSTIC WIND PROFILER IS PROPOSED, MEASURING VELOCITIES TO 100 KNOTS WITH A 2 KNOT RESOLUTION, TO HEIGHTS > OR = TO 3 KILOMETERS. TO ACHIEVE THIS IMPROVEMENT IN PERFORMANCE OVER EXISTING ACOUSTIC PROFILERS, THREE TECHNIQUES ARE BORROWED FROM UNDERWATER ACOUSTICS AND APPLIED FOR THE FIRST TIME TO WIND PROFILING TECHNOLOGY.THESE ARE: (A) A PARAMETRIC TRANSMITTING ARRAY, (B) COHERENT TRANSVERSE DOPPLER PROCESSING OF SCATTERED ECHOES AND (C) CODED PULSE SEQUENCES. NON-LINEAR ACOUSTIC INTERACTIONS AT THE SOURCE PRODUCE A LOW FREQUENCY (500 HZ) TRANSMITTED PULSE IN A NARROW (APPROX 10 DEG) BEAM WHICH IS TOTALLY FREE OF SIDE LOBES, AN IMPORTANT FEATURE IN COVERT SYSTEMS. THIS IS ACCOMPLISHED IN A PROJECTOR OF ONLY 63 CENTIMETERS IN DIAMETER. THE RECEIVERS (MICROPHONES) ARE SEPARATED BY ONLY1.2 METERS, FURTHER ENSURING SYSTEM COMPACTNESS. BECAUSE OF LOW ABSORPTION LENGTHS AT 500 HZ, ONLY 1.11 WATTS OF RADIATED POWER ARE REQUIRED TO GIVE A RETURN ECHO FROM A HEIGHT OF 3 KILOMETERS, WITH A RECEIVED SIGNAL TO THERMAL NOISE OF 20 DB UNDER WORST CONDITIONS. COHERENT DEMODULATION OF THE DOPPLER SIDEBANDS, FREQUENCY (WIND SPEED)ESTIMATION, DISPLAY AND TABULATION ARE ACCOMPLISHED DIGITALLY. PHASE I EFFORT PROVES CONCEPT AND OPTIMIZES PARAMETERS TO ACHIEVE CONCEPT DESIGN OF OPERATIONAL SYSTEM.

* information listed above is at the time of submission.

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