天文定姿中太阳系内天体视位置计算  

Apparent Position Calculation of Celestial Body in the Solar System Used for the Celestial Attitude Determination

作　　者：连月勇 张超[1] 詹银虎[1] 谢宗特 

机构地区：[1]信息工程大学 [2]75711部队

出　　处：《天文研究与技术》2016年第2期178-183,共6页Astronomical Research & Technology

基　　金：国家自然科学基金(41174025;41174026;41174027)资助

摘　　要：天体视位置是进行天文定姿的必备数据,目前视位置计算的研究多基于地面和海上,天基平台的发展需进一步研究。介绍了星上视位置转换原理,推导各种位置改正公式,基于新天文参考框架建立一种太阳系内天体视位置计算模型,可计算任意时刻天体的地心视位置和站心视位置。与天文年历地心视位置相比,类木行星的赤经差值在10 ms以内,赤纬差值在220 mas以内;与STK仿真的站心视位置相比,赤经差值在0.15 s以内,赤纬差值在2″以内。实验表明,该模型可以正确计算测瞬太阳系内天体的视位置,其精度满足天文定姿的需求。Celestial apparent position is the key data for celestial attitude determination. At present,the study of apparent position calculation mainly focuses on ground and ocean; development in space-based platform should take a further step. A conversion principle of apparent position in the spacecraft and various position correction formula is introduced in this thesis; based on the new astronomical reference frame,a model is established to calculate the apparent position of celestial bodies in the solar system,through which instantaneous geocentric virtual position and observer-fixed apparent position can be calculated. Compared with geocentric virtual position of astronomical almanac,the difference value of Jovian planet＇ right ascension can be controlled within 10 ms and declination difference under 220mas; Compared with observer-fixed apparent position of satellite tool kit,the difference value of right ascension can be kept under 0. 15 s and the declination difference under 2″. Experiments show that the model can correctly compute instantaneous apparent position of celestial body in the solar system and such precision meets the requirements of celestial attitude determination.

关 键 词：视位置计算 天文定姿 天文年历 STK 

分 类 号：P128.4[天文地球—天体测量]