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Proceedings Paper

Control of molecular contamination and outgassing of the SOFIE instrument
Author(s): James Dyer; Jim Herrick; Andrew Shumway; Chad Fish; John Stauder; Scott Schicker; Tim Gordon
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Paper Abstract

The Solar Occultation for Ice Experiment (SOFIE) instrument is one of three science instruments for the Aeronomy of Ice in the Mesosphere (AIM) mission. SOFIE is used to measure solar attenuation by mesospheric ice aerosols during each observatory sunrise and sunset using an 8-channel (16-detector) differential absorption radiometer. It directly views the sun and compares the near UV to the mid-IR spectral response during exo-atmospheric and endo-atmospheric measurements. Deposition of molecular films can degrade the reflectance and transmittance of SOFIE's optics. During on-orbit performance, it may be possible for the extended solar exposure to promote photochemical deposition and darkening effects in the UV. This paper will review the methods used to derive and verify contamination control budgets for particulate and molecular contamination during the fabrication and testing of the SOFIE instrument. Reported results include the molecular surface cleanliness throughout integration and test as well as outgassing measurements using internal and external quartz crystal microbalances. This information provides important baseline data for future correlation of instrument outgassing and potential photo-deposited contamination effects should they occur during on-orbit solar exposure

Paper Details

Date Published: 7 September 2006
PDF: 12 pages
Proc. SPIE 6291, Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control II, 62910F (7 September 2006); doi: 10.1117/12.684109
Show Author Affiliations
James Dyer, Utah State Univ. (United States)
Jim Herrick, Utah State Univ. (United States)
Andrew Shumway, Utah State Univ. (United States)
Chad Fish, Utah State Univ. (United States)
John Stauder, Utah State Univ. (United States)
Scott Schicker, Utah State Univ. (United States)
Tim Gordon, Swales Aerospace (United States)

Published in SPIE Proceedings Vol. 6291:
Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control II
O. Manuel Uy; John C. Fleming; Michael G. Dittman, Editor(s)

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