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Proceedings Paper

Multispectral HgCdTe detector subsystem for remote sensing in the High Resolution Dynamics Limb Sounder (HIRDLS) instrument
Author(s): Jeanne M. Hartley; Marion B. Reine; Robert Papinsick; D. Grise; W. King; Brian Denley; F. Adams; Howard E. Morrow
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Paper Abstract

The HIRDLS instrument is an infrared limb-scanning radiometer designed to sound the upper troposphere, stratosphere, and the mesosphere as part of the Chemistry Platform for NASA's Earth Observing System (EOS) Program. The instrument performs limb scans at multiple azimuth angles, measuring CO2, O3, H2O, aerosols and other significant greenhouse trace gases in 21 channels ranging from 6.12 to 17.76 micrometer. The Detector Subsystem (DSS) focal plane assembly (FPA) contains the 21 detectors for the science measurements and a set of alignment detectors to be used for instrument integration. All detector elements are Photoconductive HgCdTe operating in the 60 - 65 K range and each channel has a separate cold filter. The FPA is mounted in a customized vacuum dewar which couples to a Stirling-cycle mechanical cryocooler via a sapphire rod. Lockheed Martin has designed, fabricated and tested detectors covering the entire HIRDLS spectral range. All the n-type HgCdTe starting material was grown at Lockheed Martin. The vacuum dewar and the preamplifier designs were done at Lockheed Martin. In this paper, we will discuss the key features of and design drivers for the DSS design and the design validation activities. The details of the DSS to instrument interfaces will be discussed. We will consider the solutions found for design and packaging issues with the DSS, and the design trades made at the subsystem level to optimize the instrument performance and increase the ease of assembly and instrument integration.

Paper Details

Date Published: 18 November 1998
PDF: 10 pages
Proc. SPIE 3437, Infrared Spaceborne Remote Sensing VI, (18 November 1998); doi: 10.1117/12.331310
Show Author Affiliations
Jeanne M. Hartley, Lockheed Martin IR Imaging Systems (United States)
Marion B. Reine, Lockheed Martin IR Imaging Systems (United States)
Robert Papinsick, Lockheed Martin IR Imaging Systems (United States)
D. Grise, Lockheed Martin IR Imaging Systems (United States)
W. King, Lockheed Martin IR Imaging Systems (United States)
Brian Denley, Lockheed Martin IR Imaging Systems (United States)
F. Adams, Lockheed Martin Missiles & Space (United States)
Howard E. Morrow, Lockheed Martin Missiles & Space (United States)

Published in SPIE Proceedings Vol. 3437:
Infrared Spaceborne Remote Sensing VI
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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