Technical Challenge, Scientific Thrill: a long therm Lander on an active Comet

TECHNICAL CHALLENGE, SCIENTIFIC THRILL: A LONG TERM LANDER ON AN ACTIVE COMET, S. Ulamec, B. Feuerbacher and K. Wittmann, DLR Institute for Space Simulation, D-51140 Kdn, FRG; H. Rosenbauer, Max Planck Institute for Aeronomie, D-37191 Katlenburg-Lindau, FRG; G. Haerendel, Max Planck Institute for Extraterrestrial Physics, D-85740 Garching, FRG; F. Lura, DLR Institute for Space Sensor Techndogy, D-12489 Berlin, FRG