AAE450 Senior Spacecraft Design Mark Cunningham Mark Cunningham Week 10: March 29 th, 2007 Communications Team Final Presentation Slides – First Draft.

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Presentation transcript:

AAE450 Senior Spacecraft Design Mark Cunningham Mark Cunningham Week 10: March 29 th, 2007 Communications Team Final Presentation Slides – First Draft

AAE450 Senior Spacecraft Design Mark Cunningham Communication Satellite Masses Monopropellant hydrazine is used for station keeping and LOX-LH2 is used for the orbital insertion propulsion system. Primary Gangale CAD courtesy of Steve Kassab

AAE450 Senior Spacecraft Design Mark Cunningham Communication Satellite Masses GangaleMars Primary Mars Secondary GPS Number of Satellites2123 Satellite Mass (mt) (on orbit wet mass) IMLEO (mt) per satellite (satellite and orbital insertion propulsion mass) Total IMLEO for all satellites: 85 mt GPS Secondary CAD courtesy of Steve Kassab

AAE450 Senior Spacecraft Design Mark Cunningham Back Up Slides

AAE450 Senior Spacecraft Design Mark Cunningham Station Keeping and Propulsion Mass Attitude control and propulsion system masses are calculated using the rocket equation from ΔV required, Isp, payload mass, and an assumed structural coefficient of ε =.1. Monopropellant hydrazine (Isp = 220 s) is used for station keeping and LOX-H2 (Isp = 450 s) is used for the propulsion system. Station keeping and travel ΔV’s gotten from James Goppert’s analysis.

AAE450 Senior Spacecraft Design Mark Cunningham Station Keeping and Propulsion Mass

AAE450 Senior Spacecraft Design Mark Cunningham Payload Solar array mass is derived from Ryan Scott’s Solar Array Sizing Code arraysize.m. Thermal mass provided by Rick Hutchinson. Structure mass derived from Brandon Anderson’s commsat.m.

AAE450 Senior Spacecraft Design Mark Cunningham References Larson, Wiley J. and Pranke, Linda K., Human Space Flight, McGraw-Hill Companies, January 2000, Chapter ktpow.htmlhttp://exploration.grc.nasa.gov/education/rocket/r ktpow.html ktwtp.htmlhttp://exploration.grc.nasa.gov/education/rocket/r ktwtp.html de.htmlhttp://homepage.mac.com/sjbradshaw/msc/attitu de.html n/MonopropellantThrusters.htmlhttp://cs.space.eads.net/sp/SpacecraftPropulsio n/MonopropellantThrusters.html