Final Report on LOW Design Team Eclipse Joseph Sandlin

The University of Alabama Huntsville Project Management The University of Alabama Huntsville Team Leader Eddie Kiessling Structures Nathan Coffee Systems Engineer Jay Gala GN & C Brandon York Joseph Sandlin Operations Brett Guin Thermal Kathryn Kirsh Payload Operations Brent Newson Power Christopher Goes Technical Editor Michael Bryan Joseph Sandlin

Overview LOW Concept Will travel to all 20 sites Carries scientific payload on board Runs off of solar cells and batteries Team Eclipse Goals Maximize Scientific Payload Minimize Single Point Failure Joseph Sandlin

Video of Mission Insert Video by Chris

Four Phases of LOW Mission: Phases of Mission Four Phases of LOW Mission: 1.) Landing 2.) Traveling 3.) Experimentation 4.) End of Mission Brett Guin

Landing-Descent Relevant Subsystems in descent phase GN&C Structures Brandon York

Landing-Unloading Relevant Subsystems Power Communications Payload Brandon York -Launch Date – All material req’d for construction of LETS shall not have long lead times and be up-to-date (including technology). Final des. constr. well b4 launch date for testing and simulation -Mass – total: 997.4 kg, prop sys dry: 64.6 kg. Left with 932.8 kg to use. Significant bc most of mass will be used for scientific equipment. -SMD/ESMD ratio – must be 2:1 ratio. SMD means scientific exploration to understand solar system; ESMD means establish sustained human/robotic presence in space. LETS primary focus is science and less on exploration sys. -Landing – landing with +/- 100m 3 sigma precision and at 12 deg. Talk about jettisoning prop sys away from lander prior to landing and troubles it creates. Talk about landing on 12 deg slope – appropriate structural capabilities req’d to accomplish this (landing on wheels as opposed to crush pads or legs) - Mobility – sampling sites 500m apart and samples taken from perm. dark and lighted terrain, need reliable mobility. Lander on wheels allows for entire sci. payload to travel with lander simul. from site to site by use of an RTG.

Traveling Relevant Subsystems Power Mobility Thermal GN&C Runs entirely off of solar arrays and batteries Use of nuclear power was avoided Nuclear power prevents 2012 launch date Nuclear power is scarce throughout the space program Mobility Thermal GN&C

Experimentation Relevant Subsystems Power Payload Communications

End of Mission Relevant Subsystems SRV Structures Payload Nathan Coffee

How LOW meets goals? Maximize Scientific Payload LOW has the potential to visit extra sites LOW can perform more in-dept experiments Minimize Single Point Failure Comprised entirely of TRL 9 technology Conservative ConOps Schedule No Lag time in data communication Eddie Kiessling