Observations and Primary Analysis of the Eclipses and Occultation of Galileo Satellites

In July 2009,observations of mutual eclipses and occultations of Galileo satellites of Jupiter were made at the South Tianchi station of Shanghai Observatory.By using the photometric CCD images obtained from these observations and analyzing the data,we determined the beginning and end times,as well as the midlight time when the light flux of the eclipsed satellite(Ganymede) dropped to the minimum during the event.