摘要：This paper uses two navigation schemes to prove the potential of a novel autonomous orbit determination with stellar horizon atmospheric refraction measurements. Scheme one needs a single processor and uses an extended Kalman filter. The second scheme needs two parallel processors. One processor uses a hatched leastsquare initial state estimator and a high-precision dynamic state propagator. The other processor uses a real-time orbit predictor. Simulations have been executed respectively for three types （low/medial/high） of satellite orbits on which various numbers of stars are observed. The results show both schemes can autonomously determine the orbits with a considerable performance. The second scheme in general performs a little better than the first scheme.

摘要：针对公路工程外业测量中现场坐标的计算问题，介绍了一个shar PC-E500计算程序，结合在某项目路线布设中的实际应用，指出该程序运行良好，准确无误地计算出了路中线上任意桩号点的坐标，值得推广。