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一种测量大型抛物面天线重力变形的方法B
Authors
江永琛
沈志强
+4 more
王锦清
苟伟
虞林峰
赵融冰
Publication date
1 January 2015
Publisher
Abstract
本发明提供一种测量大型抛物面天线重力变形的方法,包括以下步骤:提供参考天线,与被测天线组成甚长基线干涉仪;将参考天线始终对准射电源而被测天线围绕该射电源进行扫描,以使参考天线和被测天线分别接收该射电源发射的射电源信号;对被测天线和参考天线接收的两路射电源信号进行信号处理,以得到被测天线的口径场相位;当被测天线的俯仰角每转动预定角度时,重复执行一次前述步骤,以得到被测天线在相应俯仰角下的口径场相位,该口径场相位为主面精度对应的口径场相位;得到被测天线的副面位置偏移量随俯仰角的变化;得到被测天线的主面面形偏差随俯仰角的变化。本发明能够精确测量天线主面面形偏差和副面位置偏移分别随天线俯仰角的变化
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Shanghai Astronomical Observatory,Chinese Academy of Sciences
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Last time updated on 20/01/2020