CAJ | 학술논문

利用GRACE A 卫星的星载GPS 观测数据，采用非差动力学低轨卫星定轨方法，解算了2012年1月11日至18日的卫星轨道，将得到的结果与G FZ发布的RS O轨道进行对比分析，并通过SLR观测数据进行轨道的校验。结果表明：定轨精度满足低轨卫星精密定轨的要求，与RS O轨道比较，在 X、Y 、Z方向的均方根误差的平均值分别为4．7 cm、4．3 cm和4．9cm ；通过SLR观测数据进行校验，残差平均值为-1．6cm，均方根误差为4．7cm．
이용GRACE A 위성적성재GPS 관측수거，채용비차동역학저궤위성정궤방법，해산료2012년1월11일지18일적위성궤도，장득도적결과여G FZ발포적RS O궤도진행대비분석，병통과SLR관측수거진행궤도적교험。결과표명：정궤정도만족저궤위성정밀정궤적요구，여RS O궤도비교，재 X、Y 、Z방향적균방근오차적평균치분별위4．7 cm、4．3 cm화4．9cm ；통과SLR관측수거진행교험，잔차평균치위-1．6cm，균방근오차위4．7cm．
Using zero-difference satellite-borne GPS data ,the orbit of GRACE A satel-lite by dynamic method with GPS observations is determined during the period from January 11 to 18 ,2012 .The orbit results will be compared with RSO which were released by GFZ , and be verified by SLR observation .The comparison results show that the accuracy of orbit determination can meet the requirement of LEO satellite .Compared with the RSO orbit in X ,Y ,Z direction ,the average of RMS is 4 .7 cm ,4 .3 cm and 4 .9 cm respectively .Calibra-ted with SLR observation ,the mean of residuals is -1 .6 cm ,and the RMS is 4 .7 cm .