应用商用CCD配备录像机进行天体定位的试验

A Test for the Determination of the Position of A Celestial Body with A CCD-TV

本工作是为今后在1.2米望远镜上利用商用CCD配备录像机进行人卫快速精密定位观测所做的初步试验,其目的是在实验室里模拟检测商用CCD配备录像机后对星像的绝对及相对定位精度。通过使用不同图像板及录像带在不同幅度的CCD视频信号情况下的分组试验,得到了满足人卫观测的结果,CCD对绝对位置及相对位置的定位误差均小于±0.5个象元。本文还对误差产生的原因进行了初步分析。

A method is proposed for the observation of the fast and accurate location of the artificial earth satellites(AES) with a CCD-TV attached to the 1.2-m telescope of the Yunnan Observatory. This work is a preliminary test for the use of a CCD-TV as a receiver to determine the relative and absolute accuracies by means of the analogue star images. According to the tests group by group, which is divided on the basis of various image digitizers, tapes and CCD video signals of different magnitudes. The accuracies are limited within ±0.5 pixel, which meets the requirements of the observed AES. The reasons for the errors are preliminarily analyzed.