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Proceedings Paper

The impact of aerosol spatial inhomogeneity on the design and performance of spaceborne multiangular instruments
Author(s): Shelley B. Petroy; Richard E. Nicholson; Rainer M. E. Illing; Robert d'Entremont; Hilary Snell
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Paper Abstract

Polarimetric measurements in the VIS/NIR spectral region improve aerosol microphysical and compositional retrievals. The retrieval approaches exploit the unique polarimetric signatures of aerosols as function of scattering angle, thereby driving the requirement for data collection over a large range of scattering angles. The scattering angle coverage is a function both of the instrument/sun/target geometry and the instrument architectural approach toward acquiring multi-angular data. These two functions are important aspects of a spaceborne, multi-angular polarimetric mission. The instrument design must also consider the impact of retrieval error arising from aerosol spatial variability. For a single-pixel scanning architecture, both the pixel separation as a function of earth rotation beneath the spacecraft and the pixel growth with increasing scan angle can result in significant retrieval errors due to aerosol spatial variability. We have investigated the impact of aerosol spatial inhomogeneity on the performance of a single-pixel, along-track scanning, multi-angular polarimetric instrument operating in a low-earth orbit (LEO) such as the EOS Aqua orbit of 705 km. Possible mitigation strategies to reduce the impact of the spatial inhomogeneity on aerosol property retrieval performance are also reviewed.

Paper Details

Date Published: 26 October 2004
PDF: 8 pages
Proc. SPIE 5542, Earth Observing Systems IX, (26 October 2004); doi: 10.1117/12.556353
Show Author Affiliations
Shelley B. Petroy, Ball Aerospace & Technologies Corp. (United States)
Richard E. Nicholson, Ball Aerospace & Technologies Corp. (United States)
Rainer M. E. Illing, Ball Aerospace & Technologies Corp. (United States)
Robert d'Entremont, Atmospheric and Environmental Research, Inc. (United States)
Hilary Snell, Atmospheric and Environmental Research, Inc. (United States)


Published in SPIE Proceedings Vol. 5542:
Earth Observing Systems IX
William L. Barnes; James J. Butler, Editor(s)

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