Optical pyrometry on TEMPUS: a critical assessment of noncontact temperature measurement in low earth orbit

William Hofmeister; R. J. Bayuzick; Shankar Krishnan

doi:10.1117/12.244342

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12 July 1996 Optical pyrometry on TEMPUS: a critical assessment of noncontact temperature measurement in low earth orbit

William Hofmeister, R. J. Bayuzick, Shankar Krishnan

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Proceedings Volume 2809, Space Processing of Materials; (1996) https://doi.org/10.1117/12.244342
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The German Space Agency (DLT) commissioned Dornier GmbH to construct the Tiegelfreies Electromagnetisches Prozessieren unter Schwerelosigkeit (TEMPUS) facility for conducting containerless experiments on metallic samples in low earth orbit. TEMPUS, utilizing electromagnetic positioning and heating, was flown on the IML-2 Spacelab mission in July 1994 and is scheduled to fly again on the MSL-1 mission in March of 1997. TEMPUS requires non contact temperature measurement. In particular, nucleation and heat capacity measurements have special requirements for accurate temperature measurement. For these measurements, the facility has optical pyrometer capabilities at the specific wavelength of 633nm as well as the integrated wavelength ranges of 1000 to 2500 nm and 3000 to 4000 nm. The instrument and calibration procedures are described herein. The uncertainty in the temperature measurement on TEMPUS has been quantified, and the implications on the accuracy of nucleation and heat capacity measurements is discussed.

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William Hofmeister, R. J. Bayuzick, and Shankar Krishnan "Optical pyrometry on TEMPUS: a critical assessment of noncontact temperature measurement in low earth orbit", Proc. SPIE 2809, Space Processing of Materials, (12 July 1996); https://doi.org/10.1117/12.244342

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