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The Hyperspectral Thermal Emission Spectrometer (HyTES): Preliminary ResultsThe Hyperspectral Thermal Emission Spectrometer (HyTES) is being developed as part of the risk reduction activities associated with the Hyperspectral Infrared Imager (HyspIRI). HyspIRI is one of the Tier 2 Decadal Survey Missions. HyTES will provide information on how to place the filters on the HyspIRI Thermal Infrared Instrument (TIR) as well as provide antecedent science data. The pushbroom design has 512 spatial pixels over a 50-degree field of view and 256 spectral channels between 7.5 micrometers to 12 micrometers. HyTES includes many key enabling state-of-the-art technologies including a high performance convex diffraction grating, a quantum well infrared photodetector (QWIP) focal plane array, and a compact Dyson-inspired optical design. The Dyson optical design allows for a very compact and optically fast system (F/1.6). It also minimizes cooling requirements due to the fact it has a single monolithic prism-like grating design which allows baffling for stray light suppression. The monolithic configuration eases mechanical tolerancing requirements which are a concern since the complete optical assembly is operated at cryogenic temperatures ((is) approximately 100K). The QWIP allows for optimum spatial and spectral uniformity and provides adequate responsivity or D-star to allow 200mK noise equivalent temperature difference (NEDT) operation across the LWIR passband. Assembly of the system is nearly complete. After completion, alignment results will be presented which show low keystone and smile distortion. This is required to minimize spatial-spectral mixing between adjacent spectral channels and spatial positions. Predictions show the system will have adequate signal to noise for laboratory calibration targets.
Document ID
20150006999
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Hook, Simon
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Johnson, William R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Eng, Bjorn T.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gunapala, Sarah D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lamborn, Andrew U.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mouroulis, Pantazis, Z.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mouroulis, Pantazis, Z.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Paine, Christopher G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Soibel, Alexander
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wilson, Daniel W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
April 30, 2015
Publication Date
June 21, 2011
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Earth Science Technology Forum 2011
Location: Pasadena, CA
Country: United States
Start Date: June 21, 2011
End Date: June 23, 2011
Sponsors: NASA Headquarters
Distribution Limits
Public
Copyright
Other
Keywords
Moon Mineralogical Mapper (M3).
imaging spectrometers
remote sensing

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