Opening book details…
Can I read Launch Windows for Libration Point Missions on EtoBox?
Launch Windows for Libration Point Missions by Martin Hechler is a Engineering article available to read on EtoBox.
What is Launch Windows for Libration Point Missions about?
The four upcoming ESA missions to the collinear Lagrange points in the sun-Earth system, Herschel and Planck, GAIA, and LISA Pathfinder, will be launched from French Guiana by different Rockets, namely Ariane 5, Soyuz, and VEGA. Herschel and Planck will be launched together in 2008 on an Ariane 5. The launcher injects Herschel directly into the stable manifold of a large amplitude quasi-Halo orbit at L 2 . Departing from this launch orbit, Planck performs a three manoeuvre transfer to a Lissajous orbit, on which the sun-spacecraft-Earth angle remains below 15 • . The daily and seasonal launch window for Herschel/Planck will be constrained by sun aspect angle conditions, by eclipse conditions, and by the propellant allocation on the Planck satellite. GAIA will be launched by Soyuz/Fregat end 2011. The target orbit at L 2 is similar to that of Planck, with a constrained sun-spacecraft-Earth angle. Initially, to reach a full year launch window, a launch scenario was preferred using a nearly circular parking orbit at 19 • inclination, before igniting the Fregat upper stage to enter into the transfer. Recently alternative launch scenarios have been introduced, to guarantee a controlled
Who reads Launch Windows for Libration Point Missions?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Martin Hechler
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0094-5765)
- Published
- 2009
- Language
- EN
- Field
- Engineering (Physical Sciences)