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卫星信号的捕获通常是通过对地面站天线的精确调整来获得的。对小口径的天线(1米左右)来说,只要按有关公式计算出当地的接收天线的仰角和方位角,就可以较容易捕获卫星信号;但是对于地球站大口径天线来说就可能收不到卫星信号。这是因为大口径天线的波束宽度比较窄(当口径大于6米时,半功率点波束宽度小于1度),由于天线轴系、角度指示误差等,使得总误差大大超过波束宽度。因此,对地面站天线进
Satellite signal acquisition is usually achieved through the precise adjustment of the ground station antenna. For small-caliber antennas (around 1 meter), satellite signals can be easily captured by simply calculating the local elevation and azimuth angles of the receive antennas according to the formula; however, they may not be received by the large-diameter antenna of the earth station To satellite signal. The reason is that the beamwidth of the large-aperture antenna is relatively narrow (when the diameter is larger than 6 meters, the beam width of the half-power point is less than 1 degree), and the total error greatly exceeds the beam width due to the antenna axis and the angle indication error. Therefore, the ground station antenna into