SPORE Mission Design - Georgia Tech SSDL - Georgia Institute of ...

Table of Contents
Nomenclature ............................................................................................................................................... 2
1 Introduction .......................................................................................................................................... 6
2 Requirements ........................................................................................................................................ 6
3 EV Geometry and Packaging ................................................................................................................. 8
4 SPORE Mission Design ......................................................................................................................... 11
4.1 Coordinate Frames ...................................................................................................................... 11
4.1.1 Classical Orbital Elements ................................................................................................... 11
4.1.2 EME2000: Earth-Centered Earth Mean Equator and Equinox of Epoch J2000 .................. 12
4.1.3 Fixed: Earth-Centered Earth Mean Equator and Prime Meridian of Date ......................... 12
4.1.4 Spherical Inertial Relative ................................................................................................... 13
4.1.5 Spherical Atmospheric Relative .......................................................................................... 13
4.1.6 Coordinate Frame Transformations .................................................................................... 14
4.2 Baseline Orbital Trajectories ....................................................................................................... 16
4.3 Deorbit Burn ............................................................................................................................... 18
4.4 Separation ................................................................................................................................... 19
4.5 EDL Sequence of Events .............................................................................................................. 20
4.6 Define baseline entry trajectories ............................................................................................... 21
4.7 Entry Trajectory Simulation ........................................................................................................ 21
4.7.1 One variable at a time sensitivities ..................................................................................... 29
4.7.2 Entry Uncertainties ............................................................................................................. 27
4.7.3 3 DOF Simulation and Monte Carlo Results ........................................................................ 29
4.7.4 6 DOF Stability Analysis ....................................................................................................... 33
4.7.5 6 DOF Monte Carlo Analysis ................................................................................................ 35
4.8 Parachute Selection .................................................................................................................... 39
4.9 Parachute Model ......................................................................................................................... 41
4.10 Thermal Soak-back Analysis ........................................................................................................ 42
4.11 TPS Sizing..................................................................................................................................... 42
4.12 Landing and Recovery Procedures .............................................................................................. 45
5 Conclusions ......................................................................................................................................... 45
6 References .......................................................................................................................................... 47