Ground-based CW atmospheric Doppler performance modeling

Richard J. Becherer; Lloyd R. Kahan

doi:10.1117/12.43723

1 August 1991 Ground-based cw atmospheric Doppler performance modeling

Richard J. Becherer, Lloyd R. Kahan

Proceedings Volume 1416, Laser Radar VI; (1991) https://doi.org/10.1117/12.43723
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

Doppler lidar provides atmospheric wind velocity measurements at locations in the atmosphere that are remote from the lidar platform. Critical factors in lidar wind velocity measurement performance are (a) the received signal photons that are backscattered from atmospheric aerosols in the measurement region of interest, (b) the background photons that are scattered from aerosols within the lidar field of view and do not contribute to the signal but do introduce photon noise in the coherent detection receiver, and (c) the focussing of the lidar transmitter and coherent detection receiver to provide range resolution and to optimize velocity measurement performance when using a CW laser. Tbis paper models the interaction of these factors for a ground based lidar in a monostatic geometry for potential application to atmospheric research, atmospheric microburst detection for aircraft warning, and other areas. By analogy to established methods for characterizing the performance capability of other sensor systems, the lidar performance is characterized by the carrier-to-noise ratio (CNR) and by a noise equivalent scattering coefficient (NESC).

Citation Download Citation

Richard J. Becherer and Lloyd R. Kahan "Ground-based cw atmospheric Doppler performance modeling", Proc. SPIE 1416, Laser Radar VI, (1 August 1991); https://doi.org/10.1117/12.43723

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