CAJ | 학술논문

以计算中山站2007年第1天到第100天的数据为例,对计算南极GPS观测数据时如何选择IGS跟踪站作为框架基准站问题进行了探讨.在处理过程中,对IGS站的选取分为选站数量、网形、网缘、Z坐标南北半球互相抵偿性4种情况进行了计算,并对得出的结果从均方根残差NRMS、基线向量、基线重复率、坐标中误差4个方面进行了比较,得出以下结论:在进行南极大陆单点GPS数据处理时,为得到国际地球参考框架下准确的坐标,应加入5个均匀分布在未知点周围的IGS站参与计算,距离未知点较近的点为必选点,所选点应均在南半球,且不需要考虑南北半球Z坐标的抵偿问题.
이계산중산참2007년제1천도제100천적수거위례,대계산남겁GPS관측수거시여하선택IGS근종참작위광가기준참문제진행료탐토.재처리과정중,대IGS참적선취분위선참수량、망형、망연、Z좌표남북반구호상저상성4충정황진행료계산,병대득출적결과종균방근잔차NRMS、기선향량、기선중복솔、좌표중오차4개방면진행료비교,득출이하결론:재진행남겁대륙단점GPS수거처리시,위득도국제지구삼고광가하준학적좌표,응가입5개균균분포재미지점주위적IGS참삼여계산,거리미지점교근적점위필선점,소선점응균재남반구,차불수요고필남북반구Z좌표적저상문제.
Taking the calculation of the first hundred days' data of Zhongshan station with the help of GAMIT as an example,the principles for choosing IGS tracking stations as fiducial station in Antarctic GPS data processing are discussed. Aiming at choosing IGS stations, the net-shaped, net margin, number of selected stations and mutual offset of polar coordinates Z are respectively calculated, and the results are compared with each other in following aspects: NRMS, baseline vector, baseline repetition rate and mean square error of coordinate. In order to obtain accurate coordinate in International Terrestrial Reference Frame, the following conclusions are drawn: in GPS data processing of Antarctic single-point, choosing 5 IGS stations distributed all around the unknown point evenly to involve in calculation; stations which are closer to the unknown point are essential and should be in the southern hemisphere; mutual offset of polar coordinates Z is not needed to be considered.