摘要
研究天文年历、JPL星历计算的太阳、月亮坐标的差异及对GNSS导航定位的影响。结果表明,不同星历计算的太阳坐标差异最大为5×108m,月亮坐标差异最大为3×106m。天文年历与DE421计算的星固系X方向之间的夹角最大达30′(Y方向与X方向类似)。太阳坐标差异引起的相位绕转改正之间的差异最大达0.3mm,卫星天线相位中心偏差改正之间的差异最大达3mm。太阳、月亮坐标差异导致固体潮改正之间的差异最大达3mm。经实测GPS数据验证,不同星历计算的太阳、月亮坐标差异对PPP的影响可以忽略,建议在PPP中采用计算效率高的天文年历。
This paper presents research on differences of sun and moon coordinates from astronomical almanac and JPL ephemeris and the effects of these differences on GNSS navigation and position.The maximum differences are 5×10^8 and 3×10^6m of coordinates of sun and moon calculated with different ephemeris.The difference in angle can be up to 30′ in Xdirection of the satellite fixed coordinate system between astronomical almanac and DE421（Y direction is similar to the X direction）.Wind-up correction difference and satellite antenna PCO correction difference can reach 0.3mm and 3mm respectively,caused by sun coordinate difference.Solid tidal correction difference can be up to 3mm caused by coordinate differences of sun and moon.However,the designed PPP experiment has proved that the above-mentioned influences on the PPP positioning can be ignored.The most efficient astronomical almanac is advised in PPP.
出处
《大地测量与地球动力学》
CSCD
北大核心
2015年第2期199-202,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41231064
41074013
41174015)
大地测量与地球动力学国家点实验室开放基金(SKLGED2013-4-6-E)
国家973计划(2012CB825604)
国家863计划(2012AA121803)
