| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively obtain stable adjustment reference with a high sureness and a high frequency by extracting the component of specified information within a reception wave component, measuring the level of the component and outputting the level as adjustment reference in the main lobe direction of an antenna against a satellite. SOLUTION: A synchronization control means 12 demodulates reception wave which is modulated by specified information, which comes from the satellite by a pre-known form and which is captured by the antenna 11 so as to synchronize it with the specified information. An extraction processing means 13 extracts the component of specified information within the components of the reception wave under synchronization obtained by the synchronization control means 12. A level measuring means 14 measures the level of the specified information and outputs the level as adjustment reference in the main lobe direction of the antenna 11 against the satellite. The level measured by the level measuring means 14 becomes stable adjustment reference with the high sureness and frequency concerning the main lobe direction of the antenna against the satellite being the transmission source of reception wave. |
