摘要
为了消除GPS定位中的电离层延迟误差的影响,需要精确地计算出GPS信号的电离层延迟量。考虑到伪距观测值和载波相位观测值的特性,该文采用Hatch滤波方法对伪距进行载波相位平滑,由平滑后的伪距和伪距观测值分别计算得到电离层延迟量,并进行比较分析。选用北京的IGS跟踪站(BJFS)的GPS双频观测数据为实例,结果验证了由载波相位平滑后的伪距计算得到的电离层延迟量的精度有显著提高。
The ionospheric delays of GPS signal should be calculated accurately in order to eliminate the influence of ionospheric delay errors in GPS location. Considering the characteristics of pseudorange observation and cartier phase observation, in this paper, the Hatch filtering method is used to smooth the carrier phase for pseudorange. By caculating the smooth pseudorange and pseudorange observation respectively,the ionospheric delays is obtained, and the two reasults are compared and analyzed. Through the example of the GPS double frequency observation data in Beijing IGS tracking station （BJFS）, the results verify the accuracy of ionospheric delays which are caluated by smooth pseudorange of carrier phase is improved obviously.
出处
《勘察科学技术》
2014年第4期17-19,43,共4页
Site Investigation Science and Technology
