Jen-Kai Hsu(Graduate Institute of Space Science, National Central University, Taoyuan City, Taiwan);Wing-Huen Ip(Graduate Institute of Astronomy, National Central University, Taoyuan City, Taiwan);Rebecca S. Perryman(Space Science and Engineering Division, Southwest Research Institute, San Antonio, Texas, United States of America);J. Hunter Waite(Space Science and Engineering Division, Southwest Research Institute, San Antonio, Texas, United States of America)
Titan, the largest moon of Saturn, is one of the most important research targets of the Cassini-Huygens mission. Since 2004, Cassini had made over 127 targeted flybys. The Ion and Neutral Mass Spectrometer (INMS) provided measurements of the ion and neutral density distrinution, the Ion Beam Spectrometer (IBS) of the Cassini Plasma Spectrometer (CAPS) experiment provided positive ion density profiles, and the Radio and Plasma Wave Science (RWPS) instrument provided information on the spactial distributions of electron density and electron temperature. In addition, the Cassini magnetometer (MAG) probed the magnetic region when these targeted flybys happened. By analyzing the acquired extensive data set from the decadal coverage of the measurements during the encounters. A statistical study of the spatial variations of Titan’s ionospheric composition can be made. Furthermore, we will discuss the asymmetry the Titan’s ionospheric structure caused by the interaction between Titan’s atmosphere and Saturnian magnetosphere.