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Proceedings Paper

Translation of spectral radiance levels, band choices, and signal-to-noise requirements to focal plane specifications and design constraints
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Paper Abstract

Panchromatic, multispectral, and hyperspectral image sensors spanning the visible to longwave IR (LWIR) regions of the electromagnetic spectrum are finding increased application in advanced DOD, civil, scientific, and commercial space- based programs. Research and development advancing the state-of-the-art in visible to LWIR focal plane technology requires a careful understanding of system level requirements and a methodology for the translation of these requirements to focal pane specifications. At the focal plane level, signal-to-noise based performance is generally defined in terms of wavelength dependent noise equivalent irradiance and dynamic range specifications under conditions dictated by the system application. In this paper we illustrate a process that starts with system level performance requirements and results in focal plane performance requirements. The input spectral radiances were determined with the MODTRAN atmospheric code coupled with simple sensor and focal pane signal and noise models. The process is illustrated with two different space-based sensor examples, resulting in very different focal plane designs, configurations, and physical operating conditions. Finally, these characteristics were translated to focal pane electro- optical, thermal and electronic design parameters such as: spectral quantum efficiency, integration capacitance values and areas, and likely pixel unit-cell circuit selections.

Paper Details

Date Published: 8 February 2002
PDF: 45 pages
Proc. SPIE 4486, Infrared Spaceborne Remote Sensing IX, (8 February 2002);
Show Author Affiliations
Terrence S. Lomheim, The Aerospace Corp. (United States)
Erich D. Hernandez-Baquero, U.S. Air Force (United States)

Published in SPIE Proceedings Vol. 4486:
Infrared Spaceborne Remote Sensing IX
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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