Picosatellite Design Review

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Picosatellite Design Review
Agenda 615 - Opal progress report and PIF
update 645 - HAM Picosatellite 715 -
DARPA/Aerospace Picosatellite 745 - Artemis
Picosatellite
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• 2nd SSDL microsatellite
• Started in April 1995
• Complete by May 1999
• Payloads
• Picosat Launcher
• Magnetometer
• COTS Accelerometers

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OPAL Schedule
1998
1999
Sep Oct Nov Dec Jan Feb Mar Apr May

• Engineering Model Construction
• Flight Model Fabrication
• Flight Environmental Testing
• Closed Operational Testing
• Delivery

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JAWSAT/OSPLaunch
OSP Vehicle With JAWSAT
JAWSAT with OPAL
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Picosatellite Launcher

• Mission
• Demonstrate mothership-daughtership mission
  architecture.
• Three Picosatellite Teams
• Artemis from SCU
• HAM pico
• DARPA pico

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PIF Update

• Orbit is now 700km. Likely to change again.
• Picosatellite dimensions are now 3 x 4 x 1
  inches.
• Mass model of picosatellite by November 9, 1998.
• Picosatellite flight delivery April 1, 1999.
• Preliminary date for CDR February 2, 1999.
• Web location http//ssdl.stanford.edu/opal/Subsy
  stems/Picosats/

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Pico Deliverables
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Picosat Launcher
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Assembly Cross Section
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Picosat Envelope
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Launcher-Picosat Applied Forces

• Belleville washer springs behind wedge to provide
  compliance in system
• Provide nominal force of 61 lb (max 110 lb)
• Force scales linearly with added deflection 1.2
  lb per 0.001 change in deflection Allows
  0.05 deflection from nominal
• Approx 40 lb force required to prevent separation
  of picosats from door at 15 g load

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OPAL Contact Info

• New Opal web pages
• http//aa.stanford.edu/ssdl/projects/squirt2/
• Opal Design Team
• Manager
• Jamie Cutler jwc_at_stanford.edu
• Mechanisms System Engineer
• Jeff Williams jbwill_at_stanford.edu
• Questions should be directed to the people above
  and they will route the messages appropriately.