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Frequency-Domain Signal Processor For Laser VelocimeterDynamic range and accuracy increased. New signal processor for laser-velocimeter (LV) applications overcomes major limitations of present signal processors. System requires no input-signal conditioning other than that provided by amplifiers; it operates in instantaneous mode at signal levels from bursts containing as few as 150 photons down to photon-resolved regime in averaging mode. Digital value of signal-burst frequency sent to external computer system for conversion to value of absolute frequency. Residual turbulence intensity 0.2 percent, with little dependence on signal-to-noise ratio.
Document ID
19900000217
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Meyers, James F. (NASA Langley Research Center, Hampton, VA.)
Clemmons, James I., Jr. (NASA Langley Research Center, Hampton, VA.)
Stoughton, John W. (Old Dominion Univ.)
Kanetkar, Sharad V. (Old Dominion Univ.)
Savakis, Andreas E. (Old Dominion Univ.)
Date Acquired
August 14, 2013
Publication Date
May 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 5
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
LAR-13552
Report Number: LAR-13552
ISSN: 0145-319X
Accession Number
90B10217
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitleN87-27994/TBSee AlsoFrequency Domain Laser Velocimeter Signal Processor
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