Trajectory Optimization-Time Metric/mo Minimize T Least Maneuvering Time Per Image va n=l 300 Assumptions: "Stop and Stare 250 imaging mode Triangular velocity 200 profile Small Integration Time 0工o Parameters Spacecraft masses Collector 150 k( Combiner 250 kg Pulse plasma thrusters 100 300 400 p=1000sF=14mN No of Imaging Points Constraint S/C Power 80 W Approach Traveling Salesman Result: Imaging time increases Algorithm with no of imaging points Space Systems Laboratory Massachusetts Institute of TechnologySpace Systems Laboratory Massachusetts Institute of Technology Trajectory Optimization Trajectory Optimization - Time Metric Time Metric Minimize : = ∑ = N n si a T 1 2 0 100 200 300 400 0 50 100 150 200 250 300 No. of Imaging Points T i m e (Hrs ) Least Maneuvering Time Per Image Assumptions : “Stop and Stare” imaging mode : Triangular velocity profile : Small Integration Time Parameters : Spacecraft masses Collector = 150 kg Combiner = 250 kg : Pulse Plasma Thrusters Isp = 1000 s, F = 1.4 mN Constraint : S/C Power 80 W Approach : Traveling Salesman Algorithm Result : Imaging time increases with no. of imaging points