John Dixon Communications Group Lead Locomotion Phase Lead

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Presentation transcript:

John Dixon Communications Group Lead Locomotion Phase Lead Final Slides John Dixon Communications Group Lead Locomotion Phase Lead 1 [John Dixon] [Communications]

Data Transmission Requirement In order to transmit data to successfully achieve GLXP req’s: Need to have power available to transmit over distance from the Moon to Earth Power req. to achieve desired data transmission rate From Lander to Earth: Power Req: 50 W Data Rate: 51.2 kbps From Rover to Lander Power Req: 5 W 2 [John Dixon] [Communications]

SpaceBall Thermal Managment Nitrogen Gas = high Specific Heat, low mass, efficient heat transporter Temperature rise without thermal management would cause the SpaceBall’s to overheat almost instantly Temperature rise over 8 minutes: 0.7K Thermal System Nitrogen Gas Mass = 0.01 kg Absorptivity of Z-93 = 0.17 Energy to be Dissipated = 6500 KJ 3 [John Dixon] [Communications]

Thermal Transport Over Time Steady State Equilibrium Occurs at ~50 seconds Total Temperature Rise Over 8 min = 0.7K [Name] [Group]

Lander to Earth Transmission [Name] [Group]

Rover to Lander Transmission [Name] [Group]