Space Instrument Test Facility (SITF)

Metadata Updated: March 8, 2017

FUNCTION: Enables flight optics tested under conditions designed to minimize particulate and volatile contamination of the flight hardware. Contamination causes significant optical and detector performance degradation over mission lifetime; by keeping contamination at acceptable levels, we avoid such degradation. The SITF was used for the test and assembly of the Large Angle Spectrometric Coronagraph (LASCO) and is currently being used to develop and test the next generation of space-based solar instrumentation for the NASA Solar Terrestrial Relations Observatory (STEREO) mission.DESCRIPTION: The SITF provides a clean, controlled environment for the optical calibration and assembly of modern space-based solar instrumentation. The unique requirements of this instrumentation demand a rigorous approach to contamination control. The instrument vacuum test chamber, the Solar Coronagraph Optical Test Chamber (SCOTCH), forms the primary optical test chamber and is described more fully on the previous page. The instrument handling and assembly is conducted in a Class 10 clean room to reduce particulate generation. Airborne particulate levels are continuously monitored. To prevent hydrocarbon contamination, the clean room air is filtered through activated carbon filters located in the central plenum ducts. The facility also contains a small, well-instrumented thermal vacuum/bake test chamber. This allows characterization of outgassing of components and subassemblies prior to integration in the main instrument structure.INSTRUMENTATION: The SCOTCH is instrumented with a temperature-controlled quartz crystal microbalance and a residual gas analyzer to monitor chamber and instrument outgassing. Various electrical and liquid nitrogen vacuum feed-throughs are available through ports in the tank. A large retractable bell jar pulls back into the Class 10 instrument clean room to provide access to the instrument pointing platform. To facilitate instrument handling, assembly, and alignmentoperations, the clean room contains a 1.3 [HTML_REMOVED] 7-m vibration-isolated optical bench and an overhead crane adapted for clean room use with a 1-ton load capacity. A variety of calibrated optical sources, collimators, and theodolites are available to support in[HTML_REMOVED]€‘air optical test, alignment, and assembly operations.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017

Metadata Source

Harvested from Federal Laboratory Consortium Data.json

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Resource Type Dataset
Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017
Publisher Federal Laboratory Consortium
Unique Identifier BB2B5E49-EF2E-4D91-A7AA-820F65050040
Maintainer Email
Public Access Level public
Address1 4555 Overlook Avenue S.W.
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Harvest Source Id 5859cfed-553c-48de-a478-b67b5225f6fc
Harvest Source Title Federal Laboratory Consortium Data.json
Phone 202-767-3083
Repphone (202) 767-3137
Sizesqft 0
Source Datajson Identifier True
Source Hash aa2705e666b02c2fee27b35cec9144e3ac545b85
Source Schema Version 1.1
Statecode DC

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