CCD等高仪测定太阳直径的模拟计算及其精度分析  

AN ANALOG COMPUTATION OF MEASURING SOLAR DIAMETER BY CCD ASTROLABE AND ITS ACCURACY ESTIMATION AND ANALYSIS

作　　者：徐劲[1] 徐家岩[1] 

机构地区：[1]中国科学院陕西天文台

出　　处：《空间科学学报》1994年第3期214-220,共7页Chinese Journal of Space Science

摘　　要：本文根据用光电等高仪测定太阳直径的基本原理，给出了用ＣＣＤ作探测器测定太阳直径的处理方法，并用模拟方法对不同的ｓｅｅｉｎｇ值产生了几组太阳曝光的ＣＣＤ底片．通过对这些ＣＣＤ底片的数字图象的处理和计算，对太阳直径的测定精度进行了估计和分析．计算分析表明，不论对单像还是双像方案，ＣＣＤ等高仪都能以好于０．″０５的精度测定太阳的直径．Based on the principle of measuring the solar diameter by CCD astrolabe, a method of reducing the data of the solar images is proposed and tested, and & framesof the solar images exposed on a CCD chip for each of three seeing conditions areyielded. Based on these frames of exposures, adopting digital image reduction technique, accuracy of measurement of the solar diameter is estimated and analysed. Theresults of simulating observation and computation show that CCD astrolabe couldmeasure the solar diameter with accuracy better than 0.05″ for both the scheme ofa single image and the scheme of couble images.

关 键 词：CCD等高仪 太阳直径 模拟计算 

分 类 号：P182.1[天文地球—天文学]