The Research On The Lead Method Of The APT System Of Laser Communication Between Airplane And Ground

This project is originated from the National 863 Project—the high speed and light laser link communication system between airplane and satellite; during the process of the creation of communication link, the direction of the optical axis of airborne transit instrument is determined by many factors including the position and attitude of the corresponding airplane, the space angle between the rhabdom of transit instrument and its base, the space position between the base of the transit instrument and the airplane is determined by the GPS/INS of the airplane.Because different coordinate system is adopted in the different link of measurement, the position relation between the rhabdom of the airborne transit instrument and the ground transit instrument which needs a series of coordinate conversions. According to theoretical analysis, the mathematic model has been created which is the coordinate conversion between the ground transit instrument and airborne one, and the influencing factors of the system error have been analyzed and the simulation experiments have been done to prove it.