城市勘测
城市勘測
성시감측
URBAN GEOTECHNICAL INVESTIGATION & SURVEYING
2015年
2期
102-105
,共4页
精密星历%广播星历%拉格朗日插值多项式%切比雪夫拟合多项式%太阳耀斑
精密星歷%廣播星歷%拉格朗日插值多項式%切比雪伕擬閤多項式%太暘耀斑
정밀성력%엄파성력%랍격랑일삽치다항식%절비설부의합다항식%태양요반
precise ephemeris%broadcast ephemeris%lagrange polynomial%chebyshev polynomial fitting%solar flare
卫星星历代表了卫星的轨道状态，是卫星导航定位的基础。广播星历是用户实时接收的卫星星历，广播星历的误差对定位的精度影响很大。本文介绍了利用GPS广播星历计算卫星位置的方法，通过拉格朗日插值多项式和切比雪夫拟合多项式来内插IGS精密星历来分析广播星历的GPS卫星坐标误差。结合空间环境分析了GPS卫星轨道误差与太阳活动状况的关系。
衛星星歷代錶瞭衛星的軌道狀態，是衛星導航定位的基礎。廣播星歷是用戶實時接收的衛星星歷，廣播星歷的誤差對定位的精度影響很大。本文介紹瞭利用GPS廣播星歷計算衛星位置的方法，通過拉格朗日插值多項式和切比雪伕擬閤多項式來內插IGS精密星歷來分析廣播星歷的GPS衛星坐標誤差。結閤空間環境分析瞭GPS衛星軌道誤差與太暘活動狀況的關繫。
위성성역대표료위성적궤도상태，시위성도항정위적기출。엄파성력시용호실시접수적위성성력，엄파성력적오차대정위적정도영향흔대。본문개소료이용GPS엄파성력계산위성위치적방법，통과랍격랑일삽치다항식화절비설부의합다항식래내삽IGS정밀성력래분석엄파성력적GPS위성좌표오차。결합공간배경분석료GPS위성궤도오차여태양활동상황적관계。
Satellite ephemeris present conditons of satellite orbit which is the base of GPS navigation and position. The errors of GPS broadcast ephemeris which is real-time received by receivers strongly influence the precision of posi-tion. The paper introduces the method of calculating GPS satellite coordinates,analyzes the errors of GPS satellite coordi-nates throug Lagrange polynomial insertting and Chebyshev polynomial fitting to IGS precise ephemeris(SP3). At last we analysis the relationship between the errors of GPS satellite orbit and solar activity according to the space environment.
