Design and on-orbit application of TT- 1 satellite-based automatic identification system
The technology advantages and application prospects of satellite-based automatic identification system( AIS) were introduced,and then the system of the satellite-based AIS of TT- 1 was designed to overcome the problems of multi-cell signal collision,Doppler shift and large space link attenuation,originating from the development of ground-based AIS to satellite-based AIS. This design included the composition of system,the qualification and function of AIS receiver,the design of antenna and microwave switch and the link level estimation of satellite-ground AIS. For the preparation of space applications,it mainly discussed the performance and environment test for the AIS receiver. The on-orbit application situation of TT- 1 satellite-based AIS was introduced and the results show that the innovated AIS receiver can partly ease these technical problems and achieve a wide range of maritime surveillance requirements.