D1.2 Mission and Spacecraft Design Challenges of the Sun-Earth L5 Point Lagrange Space Weather Monitoring Mission
Symposium: D1. IAF SPACE SYSTEMS SYMPOSIUM
Session: 2 – Space Systems Architectures
As part of its SSA Programme, ESA has initiated a study to define an operational system to monitor, predict and disseminate space weather information. It will generate alerts to a wide user community in sectors like space-based communications, human spaceflight, broadcasting, and many others. A key asset will be a space-based observatory, to be placed at the Sun-Earth L5 point. This paper will present an in-depth discussion of the mission and spacecraft design challenges. A distinguishing feature is that it will be the first ever deep-space mission providing an operational service. The resulting implications on the spacecraft design and autonomy will be highlighted in this paper. From a mission point of view, a narrow orbit about the L5 point needs to be established by means of a suitable transfer and manoeuvre strategy. This fixed geometry has several implications on the spacecraft and its subsystems, which will be elaborated in this paper.