A Radio Guidance Algorithm for M Series Rockets that are Used to Launch Japanese Scientific Satellites

A simple radio guidance system was adopted for M Series rockets that are used to launch Japanese scientific satellites, because of its cost performance and for orbital accuracy. In this paper, the basic concepts of the radio guidance system and its algorithm are shown with the flight plan of the rocket. The idea is simple and straightforward. As a consequence, the software is reliable and the capacity of the computer is not exceeded, and yet the guidance system still achieves the required accuracy. The system has been implemented gradually and with success during the last ten launchings. Improved accuracies were realized. In this paper the algorithm is described and several of the resulting trajectories are shown.