Rosetta is an interplanetary mission whose main objective is to
rendezvous with Comet 67P/Churyumov-Gerasimenko. The spacecraft
also carries the Rosetta Lander, Philae, to the comet and will
deploy it onto the surface of the nucleus. The ambitious
scientific goals of the Rosetta created the following
requirements: - A large number of complex scientific instruments
are accommodated on one side of the spacecraft, which must
permanently face the comet during the operational phase of the
mission, including at 1 km proximity to the active comet. During
the long cruise to the comet the dormant instruments must be
heated to ensure their survival - Complex spacecraft navigation
at low altitude orbits around an irregular celestial body with
weak, asymmetric, rotating gravity field, enveloped by dust and
gas jets - The Rosetta Lander has to be stowed to survive the
cruise and eventually to self-eject from the spacecraft. The
orbiter must navigate with 10 cm, 1 mm per second accuracy for
the ejection, and then relay dat