摘要
星表是进行天文导航定位的基础,星表的精度直接影响着导航定位的准确度。研究分析了不同大地天文测量星表的差异及其对测量成果的影响。采用实测数据计算分析了主要星表系统对大地天文测量结果的影响。计算结果表明:FK4与FK5星表系统间大地天文测量结果的差异在角秒级;FK5与HIPPARCOS星表系统间大地天文测量结果的差异为0.1″,但随着时间相对历元J2000.0的推移,其影响会越来越大。
Star catalogue is the basis of astronomical navigation and positioning,and its precision directly influence the accuracy of navigation and positioning.The differences between geodetic astronomy catalogues and their influence on surveying result were researched.Based on the measured data,the influence of main catalogues on astronomical surveying was analyzed.The result showed that the difference of geodetic astronomy result between FK4 and FK5 catalogue systems was at arc seconds level.And it was about 0.1 arc seconds between FK5 and HIPPARCOS catalogue systems.However,when the time goes far away from J2000.0,the influence on astronomical surveying result will increase.
出处
《测绘科学技术学报》
北大核心
2012年第5期344-348,共5页
Journal of Geomatics Science and Technology
关键词
大地天文测量
精度
赤经
赤纬
天文经纬度
星表
astronomical geodesy
precision
right ascension
declination
astronomical longitude and latitude
star catalogue
