CAJ | 학술논문

近20年累积的全球IGS基准站位置时间序列呈现显著的非线性变化，尤其是高程方向的季节性变化。随着各研究领域对大地测量成果所要求的精度越来越高，大地点位的非线性时变越来越受到关注。本文详细阐述了造成基准站非线性变化的成因，包括与GPS相关的技术类系统误差、地球物理效应、接收机及天线变化、地震引起的突变、噪声影响等，研究了消除或减弱各种非线性变化的方法及途径。
근20년루적적전구IGS기준참위치시간서렬정현현저적비선성변화，우기시고정방향적계절성변화。수착각연구영역대대지측량성과소요구적정도월래월고，대지점위적비선성시변월래월수도관주。본문상세천술료조성기준참비선성변화적성인，포괄여GPS상관적기술류계통오차、지구물리효응、접수궤급천선변화、지진인기적돌변、조성영향등，연구료소제혹감약각충비선성변화적방법급도경。
The global IGS base station practice sequence accumulated over the past 20 years showed a significant nonlinear changes, especially seasonal changes in elevation direction.With the precision of geodetic results in research fields is getting higher and higher, people pay more attention on the earth point nonlinear time-varying.This paper elaborates the causes of nonlinear changes of the base station, including technical system error associated with GPS, geophysical effects, mutations caused by receiver and antenna changes and earthquakes, noise effect, etc., studying the methods and ways to eliminate or weaken the nonlinear changes.