摘要
In the 21st solar cycle, the proper motions of the Type-1 sources have been discovered separately at 169 MHz (Observatory of Paris) and 460 MHz (Beijing Observatory), According to the moments that the sources were passing the fringes of the '4×16' compound interferometer, the two dimensional positions of the Type1 sources were determined in oar observations. So, it is necessary for inferring the motions of sources that some conditions be assumed. In addition, the time
