of the subsystems of a traditional spacecraft onto a single chip a few centimeters across! Current prototypes include solar cells, energy storage capacitors, microcontrollers, and radios capable of communicating with ground stations from low-‐Earth orbit.
Current Drag GG Gravity Gradient GR General Relativity LZ Lorentz Force M Magnetism MT Magnetism - Torquer MR Magnetism – Residual Field Moon Lunar Gravity OB Earth Oblateness PA Planetary Albedo PC Particle Collisions PL Solar System Planetary Gravity PR Poynting-Robertson Drag SP Solar Pressure SR Special Relativity SW Solar Wind Sun Solar Gravity g Characteristic Length
of the cloud • Use little or no closed-loop control • Take advantage of environmental effects HOW DO WE PLAN MISSIONS? f(qi, ˙ qi, t) @f @t + @f @qi ˙ qi + @f @ ˙ qi ¨ qi = 0 @f @t µ r2 @f @ ˙ r + ˙ r @f @r + ˙ ✓ @f @✓ + ˙ @f @ = 0 24
within 12,000 km of Earth • Diameter 10-50 meters • Impact Mission • Deploy ChipSats from a carrier spacecraft • Maximize number that impact • Survivors transmit sensor data to carrier ASTEROID IMPACT MISSION 25