The original ADCS design was to use three Aero Fins attached to
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The original ADCS design was to use three Aero Fins attached to
the back of the satellite, and use them to stabilize the
satellite much like a badminton birdie does. As the satellite
would tilt or turn, the fins would create a drag force in the
opposite direction of
C D *  *V 2 * AP ˆ the satellite’s velocity, expressed as: FD 
                    V . This drag force acts at  the
satellite’s center of pressure, found by using the equation:
. Since the center of pressure is at a different location than
the center of gravity, the satellite experiences a torque, that
returns it to the desired position, expressed as: TAERO  rcp /
cg  FD . This was the chosen design for the satellite’s
original orbit of 500km  because at this altitude, the
atmospheric density is high enough that the drag force produces
the dominating force.