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Proceedings Paper

The QWIP focal plane assembly for NASA's Landsat Data Continuity Mission
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Paper Abstract

The Thermal Infrared Sensor (TIRS) is a QWIP based instrument intended to supplement the Operational Land Imager (OLI) for the Landsat Data Continuity Mission (LDCM) [1]. The TIRS instrument is a dual channel far infrared imager with the two bands centered at 10.8μm and 12.0μm. The focal plane assembly (FPA) consists of three 640x512 GaAs Quantum Well Infrared Photodetector (QWIP) arrays precisely mounted to a silicon carrier substrate that is mounted on an invar baseplate. The two spectral bands are defined by bandpass filters mounted in close proximity to the detector surfaces. The focal plane operating temperature is 43K. The QWIP arrays are hybridized to Indigo ISC9803 readout integrated circuits (ROICs). Two varieties of QWIP detector arrays are being developed for this project, a corrugated surface structure QWIP and a grating surface structure QWIP. This paper will describe the TIRS system noise equivalent temperature difference sensitivity as it affects the QWIP focal plane performance requirements: spectral response, dark current, conversion efficiency, read noise, temperature stability, pixel uniformity, optical crosstalk and pixel yield. Additional mechanical constraints as well as qualification through Technology Readiness Level 6 (TRL 6) will also be discussed.

Paper Details

Date Published: 3 May 2010
PDF: 13 pages
Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76603J (3 May 2010); doi: 10.1117/12.849305
Show Author Affiliations
M. Jhabvala, NASA Goddard Space Flight Ctr. (United States)
D. Reuter, NASA Goddard Space Flight Ctr. (United States)
K. Choi, U.S. Army Research Lab. (United States)
M. Sundaram, QmagiQ, LLC (United States)
C. Jhabvala, NASA Goddard Space Flight Ctr. (United States)
A. La, NASA Goddard Space Flight Ctr. (United States)
A. Waczynski, NASA Goddard Space Flight Ctr. (United States)
J. Bundas, QmagiQ, LLC (United States)

Published in SPIE Proceedings Vol. 7660:
Infrared Technology and Applications XXXVI
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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