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A sorption-spectrophotometric platform for the concentration and subsequent quantification of biocides in spacecraft drinking water is described. This methodology, termed Colorimetric Solid Phase Extraction (C-SPE), is based on the extraction of analytes onto a membrane impregnated with a colorimetric reagent. Quantification of the extracted analytes is accomplished by interrogating the surface of the membrane with a commercially available diffuse reflectance spectrophotometer. Ground-based experiments have shown that C-SPE is a viable means to determine biocide concentrations in the range commonly found in water samples from the Space Shuttle and the International Space Station (ISS). This paper details efforts to advance C-SPE closer to space flight qualification and ISS implementation, starting with the modification of the ground based biocide detection platform to simplify operation in a microgravity environment.

This paper presents an analysis of potential methods for the testing of Space Shuttle Main Engine turbopump assemblies in a modified Component Test Facility at Stennis Space Center. In particular, the test methods will support long-duration (approximately 250 seconds) green run (acceptance) tests. Six potential test methods were considered, including the traditional, fully pressure-fed test method, some test methods involving engine systems, and some test methods involving recirculation of the pump outlet flow, or “bootstrapping.” Two of these methods were investigated in sufficient detail to provide ROM cost estimates: the fully pressure-fed method, and one of the bootstrap methods.

A description of the largest Acoustic and Vibration Test Facilities in existence for the simulation of major launch vehicle dynamic environment is given and the operational characteristics of both are discussed. Sinusoidal and random excitation techniques are described and unique vibration control methods presented. A comparison of the effects of vibration and acoustic excitation on major space vehicle structures is made.