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Venus Mobile Explorer: Balloon Concept Venus Mobile Explorer: Balloon Concept Tibor Balint NASA JPL Richard Brill San Jose State University, NASA Ames.

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Presentation on theme: "Venus Mobile Explorer: Balloon Concept Venus Mobile Explorer: Balloon Concept Tibor Balint NASA JPL Richard Brill San Jose State University, NASA Ames."— Presentation transcript:

1 Venus Mobile Explorer: Balloon Concept Venus Mobile Explorer: Balloon Concept Tibor Balint NASA JPL Richard Brill San Jose State University, NASA Ames Ed Chester CTAE Brandy Holmes University of Idaho Qamar A. Shams N ASA Langley Greg Thanavaro Boston University, Georgia Institute of Technology IPPW 6 Short Course 6-22-08

2 Mission Profile Descent Deployment from 70 - 50 km, recovers to cruise altitude, 60 - 65 km Balloon Specs Super-pressure balloon, Helium Teflon coated, acid resistant Shape (TBD by trades, spherical vs. egg-shaped) Supports payload gondola Payload/Instruments Imaging: IR (high res) + multispectral imager Chemical composition: Nepholometer + GCMS Meteorology: meteorology package (T, p, wind) Doppler: Ultra stable oscillator Sensors: Accelerometers + Gyros Drop Sondes: p, T, possible descent imager Lightning: Infrasonic microphone + electric field detector 2Venus Mobile Explorer: Balloon Concept

3 Communications Telecom trades TBD Notionally: X-band Low rate to Earth via DSN (unidirectional HGA) + High rate relay via orbiter (omnidirectional MGA/LGA) Power Gondola: Stirling Engine (21 kg, 140 W) + Secondary Batteries Drop Sondes: Primary Batteries Operationally: High power modes: (e.g. telecom) draw power from RPS + batteries Low power modes: recharge batteries from RPS Concern: ASRG heat waste rejection during cruise to Venus and entry He ASRG Batteries Drop Sondes (x2-4) Sci. Payload 3Venus Mobile Explorer: Balloon Concept

4 Power Breakdown of Balloon Concept 4Venus Mobile Explorer: Balloon Concept Power Power Avail., Watt Stirling Engine140 Secondary BatteriesTBD Science Payload Power Req., Watt Imaging IR10 Multispectral15 Chemical Composition Nephelometer40 GCMS30 Meteorology package4 Doppler Ultrastable oscillator10 Sensors Accelerometers & Gyros1.7 Drop Sondes (primary battery powered)0 Lightning Infrasonic Microphone1 Electric Field Detector1 Communications Omnidirectional, Medium/Low Gain X-band Antenna30 Directional, High Gain Antenna60 202.7

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