A Long Range Optical Scintillometer for Atmospheric Refractive Turbulence

Period of Performance: 01/01/1989 - 12/31/1989

$491K

Phase 2 SBIR

Recipient Firm

Scientific Technology, Inc.
205 Perry Parkway Suite 14
Gaithersburg, MD 20877
Principal Investigator

Abstract

SATURATION EFFECT LIMITS THE PRESENT OPTICAL SCINTILLOMETER TO MEASURE PATH PROFILE OF THE ATMOSPHERIC REFRACTIVE TURBULENCE TO 1 KM OR LESS. THE PROPOSED TECHNOLOGY MAKES THE SCINTILLOMETER OPERATING EVEN IN THE SATURATION REGIME. PHASE I RESULTS INDICATE THAT A SECOND GENERATION OPTICAL SCINTILLOMETER WOULD MEASURE ATMOSPHERIC TURBULENCE INTENSITY TO 2.5 KM WITHOUT USING LARGER TRANSMITTING OR RECEIVING APERTURES. THE USE OF SPATIALLY FILTERED TRANSMITTER AND RECEIVER TO PROFILE THE TURBULENCE ALONG THE PATH WAS INVESTIGATED. PHASE I STUDY GAVE PROMMISING RESULTS FOR A PROFILING SYSTEM. DETAILED STUDIES AND THE DESIGN OF A PROFILER WILL BE CARRIED OUT IN THE PROPOSED PHASE II EFFORTS. THE INSTRUMENT WILL PROVIDE REAL-TIME CONTINUOUS MEASUREMENTS OF TURBULENCE INTENSITY PROFILES IN THE FIELD OPERATION. THE INSTRUMENT IS INSENSITIVE TO ENVIRONMENTAL ACOUSTIC AND ELECTROMAGNETIC NOISE. IT IS COMPACT FOR EASY TRANSPORT AND OPERATION.