针对卫星系统中，Ka窄波束星间链路对指向控制模型精度需求，通过了对时间系统模型及空间坐标转换模型的深入研究采用卫星直接控制的方法利用整网历书计算卫星位置，并通过时间和坐标转换得到高精度的指向角度，实现全网通信。结合仿真实验验证并与STK仿真结果对比，及在龙芯处理板上应用，得出该算法的指向方位角精度为0.01°、俯仰角精度为0.04°且在龙芯板上执行时间为0.0026 s，满足Ka链路4°和星间数据处理时间50 ms的要求，具有工程可实现性。%In satellite systems, for the problem of precision demand on pointing control model from Ka narrow beam inter-satellite link. Through the depth research of time system model and space coordinate system conversion model, using the satellite direct control method. Firstly, we use the whole network almanac to compute the satellite position, and then obtain the precise pointing degree through time and coordinate conversation, and come true the communication of whole network. Combining the simulation of the algorithm and compared with STK simulation results, and the application on the godson board, this algorithm has the azimuth accuracy of 0.01° , the pitch angle of 0.04° , and the execution time on the godson process board of 0.002 6 s, so it can meet the requirement of 4° on Ka link and 50 ms processing time between satellites.
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