1. Daniel Chua 28 February 2008 Trajectory Optimization Group (CAD Group) Balloon Launch Trajectories (*B-HA-DA-DA) (5kg angles found by Jun, 1kg angles found by Kyle and Elizabeth) Trajectory Optimization Update

2. Balloon Launch Trajectories
0.2 kg payload
5 kg payload
Payload
(kg)
ΔV (km/s) rp
(km) ra e
0.2
9.062
305
782
0.0345 1
8.529
303
7554
0.3518 5
8.605
439
1854
0.0941
(5kg angles found by Jun, 1kg angles found by Kyle and Elizabeth)
1 kg payload
Trajectory Optimization

3. Trajectory Optimization Update
Start with large range of angles and large intervals
Choose best angles based on ΔV or eccentricity
Narrow range around best angles and shrink intervals
Repeat until interval = 1 degree
“Go” / “No go”
Test case optimized in less than half an hour
Trajectory Optimization