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Advanced Water Detection and Measurement Techniques for Space Missions

This presentation outlines the requirements and methodologies for water detection as part of future space missions. It covers the essential payload components, including experimental designs for primary and secondary water experiments, and discusses the necessary camera and acceleration measurement tools. Key topics include dynamic impact assessments, water state analysis—physorbed vs. chemisorbed—and instrument choices like Tuneable Laser Diode Spectroscopy and mass spectrometry. Expectations drawn from NASA standards and mission planning will guide the development of innovative water analysis methods.

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Advanced Water Detection and Measurement Techniques for Space Missions

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Presentation Transcript

  1. Payload Water Detection, Deceleration and Camera John Polansky

  2. Presentation Outline • Payload Requirements • Expectations • Water Detection Methods • Impact Dynamics • Camera Options John Polansky

  3. Requirements • “Shall make two water measurements…” • Primary water experiment • Secondary water experiment • “Measure depth of penetration…” • Measure acceleration profile • “Shall have a B/W camera…” John Polansky

  4. Expectations Ref: NASA, GFSD, SVS • How much water? • Possible range from 70 to 750 ppm • What state of water? • Physorbed or chemisorbed John Polansky

  5. Primary Water Experiment Ref: Mars Laser Hygrometer, Webster et al Tuneable Laser Diode Absorption Spectrometer (TDLAS) Flight rated Laser tuned to 1.37 μm 1000 g impact rating 5 W, 0.25 kg, 125 cm3 John Polansky

  6. Absorptivity P Po Ref: CarlosRC, Wikipedia • Beer’s Law P0 = Transmitted power P = Received power ε = Molar absorptivity l = Path length c = Species concentration John Polansky

  7. Secondary Water Experiment 7 cm Ref: MoonLITE mission update, Gowen • Instrument options • Ion trap spectrometer • Quadrupole Mass Spectrometer Array (QMSA) • Force Detected Nuclear Magnetic Resonance Spectrometer (FDNMR) • Zeolite water experiment John Polansky

  8. Accelerometer Ref: Endevco.com Endevco 2225 piezoelectric accelerometer Flight rated Shock rated to 20,000 g Outputs a capacitance Requires no power input 0 W, 13 g, 3 cm3 John Polansky

  9. Camera John Polansky

  10. Future Work • Select secondary water experiment • Determine camera requirements • Select camera mission • Select camera resolution • Select suitable camera • Begin preliminary sizing of all instruments John Polansky

  11. Schedule John Polansky

  12. Questions?

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