Last modified on 28 October 2014, at 21:14  Appendix:Glossary of
atmospheric reentry  Over the decades since the 1950s, a rich
technical jargon has grown around the engineering of vehicles
designed to enter planetary atmospheres. Definition of the
jargon is prerequisite to meaningful discussion about
atmospheric reentry and aerodynamic heating.    3 Degrees of
Freedom (3-DoF) trajectory simulation  a trajectory simulation
based upon three spatial coordinates, e.g. X,Y,Z and their
corresponding velocities. A 3-DoF simulation models an entry
vehicle's center-of-mass trajectory. Total angle-of-attack and
bank angle are user input parameters. 6 Degree of Freedom
(6-DoF) trajectory simulation  a 3-DoF simulation augmented by a
model of the vehicle's orientation based upon pitch, yaw and
roll angles along with Euler angles. A 6-DoF simulation includes
angle-of-attack and bank angle within the model (center-of-mass
location, control surface orientation and RCS are the user input
parameters). 6-DoF simulation of a hy