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Proceedings Paper

Cross-track infrared sounder FPA performance
Author(s): Arvind I. D'Souza; Larry C. Dawson; Stacy Marsh; Richard W. Willis; Priyalal S. Wijewarnasuriya; Roger E. DeWames; Jose M. Arias; Jagmohan Bajaj; Gernot Hildebrandt; Fergus E. Moore
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Paper Abstract

The National Polar-orbiting Operational Environmental Satellite System (NPOESS) Cross-track Infrared Sounder (CrIS) is an interferometric sensor that measures earth radiances at high spectral resolution, using the data to provide pressure, temperature and moisture profiles of the atmosphere. The pressure, temperature and moisture sounding data are used in weather prediction models that track storms, predict levels of precipitation etc. The CrIS instrument contains SWIR ((λc approximately 5 μm at 98K), MWIR (λc approximately 9 μm at 98K) LWIR (λc approximately 16 μm at 81K) Focal Plane Array (FPA) modules. A critical CrIS design selection was the use of photovoltaic (PV) detectors in all three spectral bands. PV detectors have the important benefits of high sensitivity and linearity. Each FPA modules consists of nine large (1000 μm diameter) photovoltaic detectors with accompanying cold preamplifiers. This paper describes the performance for all the modules forming the CrIS Detector Preamplifier Module (DPM). Molecular Beam Epitaxy (MBE) is used to grow the appropriate bandgap n-type Hg1-xCdxTe on lattice matched CdZnTe. SWIR, MWIR and LWIR 1000 μm diameter detectors have been manufactured using the Lateral Collection Diode (LCD) architecture. Custom pre-amplifiers have been designed to interface with the large SWIR, MWIR and LWIR detectors. The operating temperature is above 78K, permitting the use of passive radiators in spacecraft to cool the detectors. Recently fabricated 1000 micrometers diameter photovoltaic detectors have the measured performance parameters listed in the Table below. Expected D* performance from the detector/pre-amplifier models are also listed in the table. The D* values are calculated at the CrIS program peak wavelength specified for each spectral band.

Paper Details

Date Published: 10 October 2001
PDF: 11 pages
Proc. SPIE 4369, Infrared Technology and Applications XXVII, (10 October 2001); doi: 10.1117/12.445336
Show Author Affiliations
Arvind I. D'Souza, Boeing Co. (United States)
Larry C. Dawson, Boeing Co. (United States)
Stacy Marsh, Boeing Co. (United States)
Richard W. Willis, Boeing Co. (United States)
Priyalal S. Wijewarnasuriya, Rockwell Science Ctr. (United States)
Roger E. DeWames, Rockwell Science Ctr. (United States)
Jose M. Arias, Rockwell Science Ctr. (United States)
Jagmohan Bajaj, Rockwell Science Ctr. (United States)
Gernot Hildebrandt, Rockwell Science Ctr. (United States)
Fergus E. Moore, ITT Aerospace/Communications Div. (United States)

Published in SPIE Proceedings Vol. 4369:
Infrared Technology and Applications XXVII
Bjorn F. Andresen; Gabor F. Fulop; Marija Strojnik, Editor(s)

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