Stability of an iterative multiwavelength lidar scheme

Marco Vargas; Barry Gross; Fred Moshary; Samir Ahmed

doi:10.1117/12.509354

23 December 2003 Stability of an iterative multiwavelength lidar scheme

Marco Vargas, Barry Gross, Fred Moshary, Samir Ahmed

Proceedings Volume 5154, Lidar Remote Sensing for Environmental Monitoring IV; (2003) https://doi.org/10.1117/12.509354
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Multiwavelength elastic lidar is often used to probe the aerosol profiles of the atmosphere. Normally, the atmosphere is considered homogeneous and an a-priori aerosol ratio is given for each wavelength channel which is then processed independently. However, it is clear that the multiwavelength retrieved backscatter profiles should contain information that can be used to estimate particle size distribution which may provide a new estimate to range dependent aerosol ratio profiles which can be repeated until convergence. In this paper, we illustrate the basic idea of using multiwavelength data using a two wavelength lidar to obtain local information on the lidar ratio which can be used to improve lidar profiling in homogeneous atmospheres and show that a key feature of any scheme is the monotonic dependence between the optical data ratio and the distribution parameter. In addition, we extend the approach to a prototypical Nd:YAG three wavelength (355, 532, 1064 nm) lidar arrangement and show that while an iterative lidar procedure can be used to extract range dependent profiles, imprecision in the inversion procedure as well as error propagation of the lidar back integration can hamper convergence.

Citation Download Citation

Marco Vargas, Barry Gross, Fred Moshary, and Samir Ahmed "Stability of an iterative multiwavelength lidar scheme", Proc. SPIE 5154, Lidar Remote Sensing for Environmental Monitoring IV, (23 December 2003); https://doi.org/10.1117/12.509354

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