The Role Of Temperature And Temperature Drifts In Determining Performance Limits For SIRTF

A. J. Mord; L. A. Hermanson

doi:10.1117/12.951936

1 May 1986 The Role Of Temperature And Temperature Drifts In Determining Performance Limits For SIRTF

A. J. Mord, L. A. Hermanson

Proceedings Volume 0589, Instrumentation for Optical Remote Sensing from Space; (1986) https://doi.org/10.1117/12.951936
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France

Abstract

The temperature of the SIRTF optical system has two significant effects: it determines the contribution of the telescope thermal emission to the photon shot noise seen by the detectors, and it determines the magnitude of the telescope emission that constitutes the radiometric baseline against which astronomical measurements are made. Changes in the system temperature therefore produce shifts in the radiometric baseline which can set the limit on the usable sensitivity of the system. We compare these two effects and explore some of their implications. We find that temperature gradients on the primary mirror are not likely to pose a serious problem if spatial chopping is employed.

Citation Download Citation

A. J. Mord and L. A. Hermanson "The Role Of Temperature And Temperature Drifts In Determining Performance Limits For SIRTF", Proc. SPIE 0589, Instrumentation for Optical Remote Sensing from Space, (1 May 1986); https://doi.org/10.1117/12.951936

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