| 摘要 |
PURPOSE:To obtain all the necessary information for positioning a satellite without any use of a solar sensor by using a special satellite sensor. CONSTITUTION:There is prepared a satellite sensor 5, in which a different is established between the sensor output levels from the day and night sides of a satellite and by which the reflected light from those sides by the action of the solar light is discriminated. The satellite sensor 5 is connected with an A/D converter 6 and a circuit 7 for determining the width of the earth and a spin rate. As a result, the output of the sensor 5 is differentiated by a determing circuit 7 into leading edge signals and into trailing edge signals. The pulse generation is accomplished in response to the former signals whereas the pulse interruption is accomplished in response to the latter signals. Thus, the width of the satellite and the pulse train are expressed to generate an output B. And, pulse output A for determining the width of the satellite at the day (and night) sides is generated. As a result, it is possible to determine the solar angle merely by attaching the two satellite sensors 5 in the reference directions of + and - sides to the normal plane of a spin stabilizing type satellite. |
