| 摘要 |
PURPOSE:To attain efficient reception even if a moving body mounting a parabolic antenna is oscillated at its movement by changing the elevation angle of the antenna in accordance with the pitch and roll of the moving body at the spiral change of the elevation angle and azimuth. CONSTITUTION:An inclination sensor 17 for detecting an elevation direction due to the pitch and roll of a ship is provided and its output signal is converted into a digital signal by an A/D converter 18 and supplied to a microcomputer 20. If the moving body is pitched and rolled when the elevation angle and azimuth of the parabolic antenna 2 are spirally changed in accordance with the movement of the moving body within the previously fixed allowable changing range of the elevation angle and azimuth, the elevation angle is changed in accordance with the pitch and roll, so that efficient reception can be attained. |
