Giotto interplanetary orbit determination
Development, testing, and application of the Giotto orbit determination software are described. The final targetting for a close flyby of comet Halley is described.
Morley, Trevor A.↗
Engineering topics
Premkumar, R.
Publications and source records attributed to Premkumar, R..
Global sensitivity to velocity errors at the libration points
The global effects on non-linear stability are investigated at and around the triangular libration points. The model of the circular restricted problem of three bodies is used, considering the earth and the moon as the primaries. Areas of the initial conditions in the configuration space leading to stability with zero initial velocity around the equilibrium points are compared to stable areas in the phase space with variable initial velocity and zero initial deviations at the equilibrium points. The behavior of the system concerning errors due to initial conditions in the configuration space is studied for 6 years and the effects of initial velocity errors are considered for 7.73 years.
Szebehely, V.↗