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405
Jun 2, 2011
06/11
by
Hansen, Patricia A
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The Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) was deployed on-orbit in February 1997. The contamination program for STIS was stringently controlled as the five-year end-of-life deposition was set at 158, per optical element. Contamination was controlled through materials selection, extensive vacuum outgassing certifications, cleaning techniques, and environmental controls. In addition to ground contamination controls, on-orbit contamination controls were...
Topics: FRICTION STIR WELDING, PINS, FORCE, TORQUE, ALUMINUM
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348
Jun 12, 2011
06/11
by
Hansen, Patricia A.; Townsend, Jacqueline A.; Hedgeland, Randy J
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Over the past two decades, the Hubble Space Telescope (HST) Contamination Control Program has evolved from a ground-based integration program to a space-based science-sustaining program. The contamination controls from the new-generation Scientific Instruments and Orbital Replacement Units were incorporated into the HST Contamination Control Program to maintain scientific capability over the life of the telescope. Long-term on-orbit scientific data has shown that these contamination controls...
Topics: MANAGEMENT SYSTEMS, ECOLOGY, MOBILITY, TOPOLOGY, FAILURE, ORGANISMS, POPULATIONS, WIRELESS...
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144
May 27, 2011
05/11
by
Hansen, Patricia A.; Hughes, David W.; Montt, Kristina M.; Triolo, Jack J
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Maintaining contamination certification of multi-mission flight hardware is an innovative approach to controlling mission costs. Methods for assessing ground induced degradation between missions have been employed by the Hubble Space Telescope (HST) Project for the multi-mission (servicing) hardware. By maintaining the cleanliness of the hardware between missions, and by controlling the materials added to the hardware during modification and refurbishment both project funding for contamination...
Topics: MAGNETIC FIELDS, SOLAR CONVECTION (ASTRONOMY), ROOT-MEAN-SQUARE ERRORS, AZIMUTH, MAGNETIC...
