中文摘要：

星载GPS技术是卫星精密定轨及其任务顺利执行的关键，而模糊度和周跳问题是星载GPS相位数据应用的难题。本文利用宽巷／窄巷法对星载GPS相位数据进行模糊度计算和周跳探测，给出了模糊度计算和周跳探测的计算公式和解算步骤。利用宽巷／窄巷法对CHAMP卫星实际星载GPS数据进行了处理，结果表明该方法是可行的，同时由于卫星的高速运动，星载GPS数据的模糊度解算和周跳探测难度也较大。

英文摘要：

The satellite-borne GPS technique is very important to determine the precise orbit of artificial earth satellite and successfully execute the satellite mission. But the onboard GPS phase data include the ambiguities and the cycle clips and it is very difficult to fully solve them. The wide-lane/narrow-lane method is used to solve ambiguity and detect cycle slip for onboard GPS phase data in this paper. The formulae and the procedure are given to calculate ambiguity and cycle slip. In the meantime, the wide-lane/narrowlane method is used to process the practical GPS observations onboard CHAMP. The results indicate that the method is practical and efficient. Since the satellite moves at a very large velocity, it is more difficult to solve ambiguity and detect cycle slip for onboard GPS data than the ground-based GPS data.