Comprehensive system model for CO2 DIAL

Mark J. Schmitt; Brian D. McVey; Bradly J. Cooke; George E. Busch

doi:10.1117/12.236906

29 March 1996 Comprehensive system model for CO₂ DIAL

Mark J. Schmitt, Brian D. McVey, Bradly J. Cooke, George E. Busch

Proceedings Volume 2702, Gas and Chemical Lasers; (1996) https://doi.org/10.1117/12.236906
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

The Simulation and Optimization Numerics for DIAL (SONDIAL) code is described. An overview of the code structure is given consisting of individual models for the lidar hardware linked to a set of models for the natural environment through which the laser energy must traverse. The affects of the environment are contained in the field models. A detailed description of the field models is given including the effects of the atmosphere, plume and target on the return statistics of the radiation. The atmosphere attenuates and scatters the laser light. Atmospheric extinction has both spectral and temporal structure that can cause bias and correlation in the DIAL measurements. The results of FASCODE calculations utilizing the HITRAN database are used to assess the magnitude of these effects. Atmospheric turbulence spatially modulates the intensity footprint at the target and modifies the statistics of the return light collected by the receiver aperture. The roughness of the target produces speckle at the receiver, the statistics of which are given by the intensity distribution on the target surface. An albedo model that includes the effects of (macroscopic) spatial reflectivity variations of typical natural targets on the system single-shot signal-to-noise ratio is described. To address the effect of footprint size and position on effluent detection sensitivity, an overlap calculation between a Gaussian plume model and the optical footprint is performed. Validation comparisons between the model and experimental data are given.

Citation Download Citation

Mark J. Schmitt, Brian D. McVey, Bradly J. Cooke, and George E. Busch "Comprehensive system model for CO₂ DIAL", Proc. SPIE 2702, Gas and Chemical Lasers, (29 March 1996); https://doi.org/10.1117/12.236906

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available