CAJ | 학술논문

基于削弱实时动态精密单点定位多路径效应的目的,首先分析了多路径误差的产生原理,利用信噪比与高度角的关系判断多路径产生的来源,利用TEQC软件量化多路径误差的大小.其次分析了一般导航定位中的设置截止高度角法减少多路径效应在实时动态精密单点定位中的作用,试验表明这种方法并不适用于精密单点定位.基于Estimate SETC模型和Iono-Free LC对多路径效应对电离层改正的影响进行了研究,发现当多路径效应显著时,双频电离层改正会带来更大的误差,不利于精密单点定位的高精度解算.最后根据实际数据解算结果,在多路径效应显著的情况下,建议选用精确的模型改正消除电离层误差,而不使用双频消除电离层延迟法.
기우삭약실시동태정밀단점정위다로경효응적목적,수선분석료다로경오차적산생원리,이용신조비여고도각적관계판단다로경산생적래원,이용TEQC연건양화다로경오차적대소.기차분석료일반도항정위중적설치절지고도각법감소다로경효응재실시동태정밀단점정위중적작용,시험표명저충방법병불괄용우정밀단점정위.기우Estimate SETC모형화Iono-Free LC대다로경효응대전리층개정적영향진행료연구,발현당다로경효응현저시,쌍빈전리층개정회대래경대적오차,불리우정밀단점정위적고정도해산.최후근거실제수거해산결과,재다로경효응현저적정황하,건의선용정학적모형개정소제전리층오차,이불사용쌍빈소제전리층연지법.
@@@@This paper investigates mitigating the multi-path effect in real-time dynamic PPP(Precise Point Posi-tioning). First,the generation principle of multi-path errors is analyzed,the source of multi-path generation is determined by using the relationship between elevation angle and SNR(Signal-to-Noise Radio),the size of mul-ti-path error is quantified by using TEQC software. Second,the role of setting cut-off angle method to reduce multi-path effects in real-time dynamic PPP is discussed,test shows that this method is not applicable for PPP. By studying the impact of the multi-path effects on the ionosphere correction based on the Estimate SETC model and Iono-Free LC,it is found that in significant multi-path effects condition,the dual-frequency ionosphere cor-rection will lead to greater error,which is not conducive to a high PPP precision solver. Finally,according actual data solver,in the significant multi-path effect cases,the use of precise model correction is suggested to elimi-nate the ionosphere error,instead of using the dual-frequency.