This paper proposes the use of RLS real-time high-precision positioning algorithm in high-precision real-time positioning of space-based internet of things loads, which overcomes the traditional least-squares high order of inverse matrix, large amount of calculation and easy to appear ill-conditioned matrix that can’t seek the inverse, can continuously obtaining estimates in real time, suitable for satellite on-orbit applications. The article analyzes the positioning accuracy grade distribution of RLS real-time high-precision positioning algorithm in detail. The analysis results show that the positioning accuracy is mainly affected by the error of frequency measurement, position error and velocity error, and the error of frequency measurement has a great influence. When the satellite position error is 5m,the velocity error is 0.01m/s, and the Doppler error is 0.1Hz, the probability of positioning error less than 1000m is 95.5%, which satisfies the normal distribution standard deviation 2σ distribution (95.5%).
Wireless ad hoc sensor networks have been used more and more in recent years, and they are mainly used in the continuous monitoring of complex environment. The low power and dual frequency characteristics of the SimpleLink CC1350 LaunchPad micro control platform are very suitable for the research of wireless ad hoc sensor networks. Because the synchronization of each node clock is the premise of the normal work of wireless sensor network, this paper mainly studies the time synchronization problem of CC1350 development board. In this paper, the advantages and disadvantages of the existing time synchronization methods are analyzed, then the LTSP algorithm is selected at the end, and the experimental verification is carried out on MATLAB software platform and CC1350 system. The experiment result shows that the time synchronization precision and extensibility of the algorithm can meet the requirement of networking.