IR detector system for the GERB instrument

Gillian I. Butcher; Richard E. Cole; Nick Nelms; Oliver Blake; C. H. Whitford; R. Andrew Wood; Robert E. Higashi; Jeff A. Ridley

doi:10.1117/12.331301

18 November 1998 IR detector system for the GERB instrument

Gillian I. Butcher, Richard E. Cole, Nick Nelms, Oliver Blake, C. H. Whitford, R. Andrew Wood, Robert E. Higashi, Jeff A. Ridley

Author Affiliations +

Proceedings Volume 3437, Infrared Spaceborne Remote Sensing VI; (1998) https://doi.org/10.1117/12.331301
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

The Geostationary Earth radiation Budget (GERB) instrument will play an important role in Earth Observation Science, when it is launched on ESA's Meteosat Second Generation (MSG) satellite in 2000. The purpose of the instrument is to measure the reflected and emitted radiation of the Earth over at least a five year period, to an accuracy better than 1% within a 15 minute observation period. These scientific requirements have resulted in a detector system comprising several technological advances. The detector chosen for this instrument is a 256 pixel linear array of thermoelectric (TE) elements operating at room temperature. Based on an existing commercial design, the detector has pushed micromachined thermoelectric arrays to its limits to achieve the noise requirements. The spectral requirements of the instrument to give a flat spectral response over the 0.32 - 30 micrometer range has necessitated the blacking of the TE array. Blacking such small area arrays is a novel application and presented several problems during the course of the development. The signal conditioning electronics, consisting of 4 Application Specific Integrated Circuits, performs front end analogue signal processing, A/D conversion and multiplexing. The design of the detector system is presented in this paper, with the packaging, signal processing and blacking described in some detail.

Citation Download Citation

Gillian I. Butcher, Richard E. Cole, Nick Nelms, Oliver Blake, C. H. Whitford, R. Andrew Wood, Robert E. Higashi, and Jeff A. Ridley "IR detector system for the GERB instrument", Proc. SPIE 3437, Infrared Spaceborne Remote Sensing VI, (18 November 1998); https://doi.org/10.1117/12.331301

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