Temperature, pressure and high-fidelity pointing knowledge for solar occultation using 2D focal plane arrays

Larry L. Gordley; Martin J. McHugh; Mark E. Hervig; John C. Burton; Liang Liu; Brian E. Magill; James M. Russell

doi:10.1117/12.648059

29 August 2005 Temperature, pressure and high-fidelity pointing knowledge for solar occultation using 2D focal plane arrays

Larry L. Gordley, Martin J. McHugh, Mark E. Hervig, John C. Burton, Liang Liu, Brian E. Magill, James M. Russell

Author Affiliations +

Proceedings Volume 5883, Infrared Spaceborne Remote Sensing 2005; 588310 (2005) https://doi.org/10.1117/12.648059
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Accurate simultaneous retrievals of temperature and pressure are key to retrieving high quality mixing ratio profiles from occultation sensors. Equally important is accurate determination of the vertical separation between measurement points. Traditionally, these tasks are complicated by platform motion and CO₂ model errors. We present a new approach that is independent of platform motion and CO₂ concentration, using inexpensive modern 2D focal-plane arrays and an innovative refraction-angle measurement. This provides both accurate temperature retrievals and precise vertical separation of measurement samples, greatly improving the quality of mixing ratio retrievals. We show recent studies demonstrating the expected performance of the SOFIE instrument (Solar Occultation For Ice Experiment) to be launched as part of the AIM (Aeronomy of Ice Mission) in September 2006. This system will have the ability to retrieve accurate temperature, through mild particulate contamination (such as volcanic aerosol and cirrus) from cloud-top to stratopause, independent of mixing ratio knowledge. Additional CO₂ absorption channels will provide retrieved temperature and CO₂ mixing ratios through the mesosphere and into the lower thermosphere.

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Larry L. Gordley, Martin J. McHugh, Mark E. Hervig, John C. Burton, Liang Liu, Brian E. Magill, and James M. Russell "Temperature, pressure and high-fidelity pointing knowledge for solar occultation using 2D focal plane arrays", Proc. SPIE 5883, Infrared Spaceborne Remote Sensing 2005, 588310 (29 August 2005); https://doi.org/10.1117/12.648059

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