深空探测器大口径天线指向在轨标定方案

基于深空探测器配备的大口径天线的指向精度要求,给出了一种深空探测器大口径天线在轨指向的标定方案,以解决深空探测器安装的大口径天线的在轨指向评价问题。通过对飞行器特点和约束条件的分析,结合"嫦娥4号"中继星天线的具体情况,采用星地协同工作的方法,给出了天线指向在轨标定的方案,并明确了标定的实施流程,最后对标定过程中的误差情况进行了分析。本方案可推广应用于其他深空探测器大口径天线指向标定方案的设计。

The Calibration of Deep Space Exploration Spacecraft Antenna Beam Direction

Based on the pointing accuracy requirements of large-caliber antennas equipped with deep-space detectors, a calibration scheme for the in-orbit pointing of deep-space detectors with large-diameter antennas is presented to solve the in-orbit pointing evaluation problem of large-caliber antennas. By analyzing the characteristics and constraints of the spacecraft,combining with the specific situation of the relaying satellite antenna of Chang''e-4,and adopting the method of satellite-Earth cooperative work,this paper presents the calibration scheme of the antenna pointing to the orbit,and the implementation process of the calibration. Finally,it gives the errors in the calibration process. This scheme can be applied to the design of calibration schemes for other large-space antenna large-caliber antennas.