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Proceedings Paper

MWIR imaging spectrometer with digital time delay integration for remote sensing and characterization of solar system objects
Author(s): Stephen E. Kendrick; Alex Harwit; Michael Kaplan; William D. Smythe
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Paper Abstract

An MWIR TDI (Time Delay and Integration) Imager and Spectrometer (MTIS) instrument for characterizing from orbit the moons of Jupiter and Saturn is proposed. Novel to this instrument is the planned implementation of a digital TDI detector array and an innovative imaging/spectroscopic architecture. Digital TDI enables a higher SNR for high spatial resolution surface mapping of Titan and Enceladus and for improved spectral discrimination and resolution at Europa. The MTIS imaging/spectroscopic architecture combines a high spatial resolution coarse wavelength resolution imaging spectrometer with a hyperspectral sensor to spectrally decompose a portion of the data adjacent to the data sampled in the imaging spectrometer. The MTIS instrument thus maps with high spatial resolution a planetary object while spectrally decomposing enough of the data that identification of the constituent materials is highly likely. Additionally, digital TDI systems have the ability to enable the rejection of radiation induced spikes in high radiation environments (Europa) and the ability to image in low light levels (Titan and Enceladus). The ability to image moving objects that might be missed utilizing a conventional TDI system is an added advantage and is particularly important for characterizing atmospheric effects and separating atmospheric and surface components. This can be accomplished with on-orbit processing or collecting and returning individual non co-added frames.

Paper Details

Date Published: 21 September 2007
PDF: 11 pages
Proc. SPIE 6678, Infrared Spaceborne Remote Sensing and Instrumentation XV, 66781A (21 September 2007); doi: 10.1117/12.729152
Show Author Affiliations
Stephen E. Kendrick, Ball Aerospace & Technologies Corp. (United States)
Alex Harwit, Ball Aerospace & Technologies Corp. (United States)
Michael Kaplan, Ball Aerospace & Technologies Corp. (United States)
William D. Smythe, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 6678:
Infrared Spaceborne Remote Sensing and Instrumentation XV
Marija Strojnik-Scholl, Editor(s)

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