基于高精度星敏感器的船载雷达海上精度鉴定

发布时间：2018-04-11 16:11

本文选题：精度鉴定 + 星敏感器　；参考：《光学精密工程》2017年07期

【摘要】：航天测量船海上航行时主要通过精度校飞进行雷达精度鉴定,针对其周期长、耗费大和组织协调困难的缺点,提出了一种采用高精度星敏感器与雷达捷联跟踪测量空间目标进行海上精度鉴定的方法。雷达在跟踪空间目标的同时,星敏感器实时拍摄天线指向附近星图。首先,星敏感器利用雷达输出的编码器角度计算视轴的初始指向,通过快速星图识别和目标定位获取天线地心坐标系精确指向;然后,经坐标变换到地平系,根据蒙气差模型修正地平系俯仰角,再经过船摇修正转换到甲板坐标系;最后,进行轴系误差及脱靶量修正,实现雷达指向精度鉴定。试验结果表明:利用该方法测量的船载雷达相对于星敏感器方位、俯仰随机残差优于50″,满足雷达精度鉴定要求,证明该方法的可行性。
[Abstract]:Radar accuracy identification is mainly carried out by means of precision calibration during navigation of spaceflight measuring vessels, aiming at the shortcomings of long period, large cost and difficult organization and coordination.In this paper, a high precision satellite sensor and a radar strapdown tracking method are proposed to identify the marine accuracy of space targets.While the radar tracks the space target, the star sensor captures the antenna pointing to the nearby star map in real time.First, the star sensor calculates the initial direction of the axis of view by using the encoder angle of radar output, and obtains the precise direction of the antenna geocentric coordinate system by fast star map recognition and target positioning.The pitch angle of the flat system is corrected according to the model of the difference of the Mongolia gas, and then converted to the deck coordinate system by the ship shake correction. Finally, the errors of the shafting system and the miss distance are corrected to realize the identification of the radar pointing accuracy.The experimental results show that the azimuth of the shipborne radar measured by this method is less than 50 "relative to the azimuth of the satellite sensor, which satisfies the requirement of radar accuracy identification and proves the feasibility of the method.
【作者单位】：中国卫星海上测控部;中国科学院长春光学精密机械与物理研究所;
【基金】：航天科学基金资助项目(No.2001-JS-000675) 国家自然科学基金资助项目(No.60878052)
【分类号】：TN959.7

【相似文献】