The experiment with differential GNSS relative navigation of fractionated modular spacecraft

In the various navigation modes of the fractionated modular spacecraft, the differential GNSS (DGNSS) can provide the high-precision, high-reliability navigation information and is the key to cluster flight navigation of fractionated modular spacecrafts. To solve the problem of obtaining the position and velocity of the ORK/DGNSS integrated navigation system, the state and observation equations of the integrated navigation system are discussed, the filtering model of the integrated navigation system is designed, and the semi-physical simulation of the ORK/DGNSS integrated navigation is built. Also, the structure and function of the semi-physical simulation system are built, the flow of the semi-physical simulation experiment is designed, and the simulation results are analyzed. The simulation results show the ORK/DGNSS integrated navigation system has high navigation precision.