Study of a pulsed coherent lidar for crosswind sensing
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Study of a pulsed coherent lidar for crosswind sensing

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Study of a pulsed coherent lidar for crosswind sensing
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  • Personal Author:
  • Corporate Authors:
    Wave Propagation Laboratory
  • NOAA Program & Office:
    OAR (Oceanic and Atmospheric Research)
  • Description:
    Under a previous interagency agreement with ERADCOM/ASL, NOAA/WPL performed an investigation of the expected performance of a pulsed coherent lidar system for remote wind measurements in the troposphere in support of artillery firings (Pratte, et al., 1979). A range capability of 20 km to an altitude of 10 km, a measurement resolution of 0.5 km (range), and +_ 0.5 ms1 (velocity) were set as requirements for the system. A CC^ laser (10.6 ym) transmitter wavelength was assumed. The basic output of such a system is the radial wind component. A series of such measurements along separated lines-of-sight provides the total wind vector. A numerical analysis of the system signalto-noise ratio equation indicated that a system with a transmit-receive optic diameter of 0.5 m was optimum for the range requirement and that system performance, assuming the near-term availability of 5 J pulse transmitted power, was adequate for an operational field device. The effects of adverse weather on system performance was studied in detail with particular emphasis given to operational effectiveness in cloud conditions. The need for a measurement program to identify the extent to which reported 10/10 cloud cover contain a sufficient number of adequately transparent regions for penetration of 10 y radiation became evident during the study. The lack of such regions could bea limiting factor for system operation under such conditions.
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  • Series:
    NOAA technical memorandum ERL WPL ; 48
  • Document Type:
    Technical Memorandum
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    CC0 Public Domain
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    Library
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