The flyby of the Cassini spacecraft at Jupiter on December 30, 2000 is an important event of the Cassini/Huygens mission on its voyage to Saturn and Titan. At this time two spacecrafts are observing the giant Jupiter system, namely Cassini and Galileo, providing the possibility for simultaneous observations of plasma parameters and magnetic field structures. Moreover the non-thermal radio emission of Jupiter is used to calibrate the antenna system of the Radio and Plasma Wave Science (RPWS) Experiment. Some years ago the so-called rheometry experiment has shown that the body of the spacecraft and the Huygens probe are strongly influence the reception properties of the antennas. Thus, software tools were developed at the Space Research Institute in Graz to compute the effective length vectors of the RPWS antennas. For this purpose several roll manoeuvres of the spacecraft were done and the voltage measurements enable as Input-parameters the estimation of the wave parameters of the observed electromagnetic waves as well as the computation of the effective length vectors of the antennas.
|
