Colloquium: Maarten Haneveer (SSE)
01 juni 2017 13:30 - Locatie: Room B, Faculty of Aerospace Engineering, Kluyverweg 1, Delft.
Orbital lifetime prediction assessment
The ballistic coefficient β of a satellite indicates the influence atmospheric drag has on the orbital decay of said satellite. A method capable of batch estimating β while mitigating most atmospheric errors has been developed, through which over 50 CubeSats have had their β estimated. The estimated β are consecutively adjusted for the epoch- and altitude-depend drag coefficient, performed analytically as a function of ambient gas-composition and spacecraft geometry.
When subjecting the β values to an orbit propagator and comparing them to their actual orbits, prediction improvements of up to 40% have been observed compared to regular non-adjusted β values.