At present,occultation receiver is mostly composed of hardware devices.With the progress of computer and electronic technology,GPS software receiver has characters of low-cost,reconfiguration,strong expansibility.It shows the advantages in obtain carrier phase observations,especially in open-loop tracking in the case of lose-of-lock in closed-loop tracking.The GPS signal capture,close-loop tracking,open-loop tracking and carrier phase observations extraction processes are carried out in the experiment,which was conducted at the Jiugong Mountain.Finally,the outputs of software receiver and hardware receiver are compared.The experiment confirmed the feasibility of the software receiver.%目前,掩星接收机主要采用硬件构造.随着计算机与电子技术的发展,软件接收机以其可重配置、可扩展性强等优点,显现出对掩星观测数据提取,特别是闭环跟踪失锁情况下的开环跟踪算法研究方面的优势.设计了一种应用于获取载波相位观测值的软件接收机,包括软件接收机的设计及掩星观测量的提取.在高度为1.5 km的湖北省九宫山进行了现场验证实验,完成了信号的捕获、闭环跟踪、开环跟踪及载波相位观测值的提取,并与硬件接收机输出的结果进行比对,验证了本软件接收机设计的可行性.
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