GAIA DR2星表在数字天顶摄影定位中的应用  

Application of GAIA DR2 Star Catalogue in Digital Zenith Photographing and Positioning

作　　者：任磊 徐天河[2,3] 龚建 常俊琴 REN Lei;XU Tianhe;GONG Jian;CHANG Junqin(1001 Factory of PLA,Xi’an 710003,China;Institute of Space Science,Shandong University,Weihai 246209,China;State Key Laboratory of Geo-Information Engineering,Xi’an 710054,China)

机构地区：[1]解放军第一〇〇一工厂,陕西西安710003 [2]山东大学空间科学研究院,山东威海246209 [3]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学技术学报》2020年第3期226-231,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(11773030);国家野外科学观测研究站开放基金项目(2018KTL01)。

摘　　要：为提高数字天顶摄影仪的测量精度及稳定性,将GAIA DR2星表应用于数字天顶摄影定位数据处理的工程实现;比对了传统依巴谷星表与最新发布的GAIA DR2星表之间星体参数特征及恒星空间分布状态的差异;系统分析了GAIA DR2星表站心视位置计算模型及恒星空间分布对旋转轴位置解算精度的影响。实验结果表明,使用GAIA DR2星表能为星图匹配提供高精度冗余数据,使天文定位精度在纬度方向提高了27%,经度方向提高了31%。研究成果验证了GAIA DR2星表应用于数字天顶摄影定位工程实践的可行性与准确性。In order to improve the measurement accuracy and stability of digital zenith photography,GAIA DR2 star catalogue is applied to digital zenith photography positioning system.The differences between traditional Hipparcos and newly released GAIA DR2 in the characteristics of star parameters and the spatial distribution of stars are compared.The calculation model of the apparent position about GAIA DR2 at the observational station and the influence of star spatial distribution on the accuracy of rotating axis position calculation are derived.The experimental results show that GAIA DR2 catalogue can provide high precision redundant data for star map matching,which improves the accuracy of astronomical positioning in latitude direction by 27%and longitude direction by 31%.The feasibility and accuracy of the star catalogue applied to digital zenith photography positioning are verified.

关 键 词：数字天顶摄影定位 GAIA DR2星表 依巴谷星表 恒星视位置 天文经纬度 

分 类 号：P222[天文地球—大地测量学与测量工程]