Path Characterization Algorithms for FASCODE
Final rept. 17 Jul 1987-17 Jan 1990,
ATMOSPHERIC AND ENVIRONMENTAL RESEARCH INC CAMBRIDGE MA
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This report has described the results of a study undertaken at AER to identify and implement a state of the art nonlinear retrieval approach to characterize line of sight variability of atmospheric thermal and constituent environments. This path characterization capability was designed to interface with the existing Geophysics Laboratory GL line-by-line radiancetransmittance code, FASCODE. Accomplishments of the study include a a review of the relevant literature concerning potential path characterization retrieval algorithms, selection of a physical least squares PLS nonlinear retrieval approach for implementation based on criteria including flexibility within the context of FASCODE and a certain degree of robustness in application b development of a stand alone, preprocessing screening procedure to identify potential channels for path characterization based on user requirements c formulation and implementation of the path characterization retrieval algorithm including suitable interfaces with FASCODE d inclusion of a comprehensive error analysis capability as an integral part of the retrieval procedure e demonstration of the approach for the retrieval of temperature, water vapor and ozone and f comprehensive documentation of the path characterization code implementations.
- Atmospheric Physics
- Computer Programming and Software