Study for rover position systems based on lunar lander-robotic rover communication link in CE-3 mission

Considering the requirements for the lunar rover positioning in the future lunar reconnaissance, several methods of lunar rover positioning are compared and analyzed firstly, and a new method is proposed in this paper according to the characters of the lunar rover activities, which uses the asynchronous transmission incoherent spread-spectrum communication/ranging system, and dual-UHF-antenna short-baseline carrier coherent angle detection method, to achieve high accuracy of ranging and azimuth angle results, and can figure out the rectangular coordinates position and vector of the lunar rover. The autonomous and real time precise positioning of the lunar rover over the whole activities on the moon can be realized with the use of the new method proposed here.