Precision Analysis of Multi-system Combination SPP
WANG Haoxin
ZHAO Yingliang
SUN Xingli
BAI Jiansheng
Abstract：Regarding the evaluation of positioning accuracy for multi-system combined Standard Point Positioning(SPP),this paper investigates the impact of different satellite cutoff elevation angles on the SPP performance of the GPS/BDS/GLONASS/Galileo/QZSS five-system combination,the effect of single point positioning design different cut-off height Angle(10°～60°)posi-tioning experiment.The number of visible satellites,positioning standard deviation and geometric accuracy attenuation factor(GDOP)are compared and analyzed based on the measured data.The experimental results show that compared with BDS and GPS,the number of visible satellites in multi-system combination is increased by 1.5～4.4 times,and the GDOP value is decreased by 47%～70%.When the cutoff altitude Angle is>50°,the multi-system combination can still maintain 10～12 effective satellites,and the epoch availability rate is 100%,which verifies the strong adaptability of multi-system fusion to extreme occlusion environment,and significantly improves the accuracy and reliability of SPP.
Keywords：cut-off elevation anglemulti-systemnumber of visible satellitesaccuracy analysisGDOP
Publication Date：2025-09-20
Online Publishing Date：2025-12-23(First online date of this platform, not the publication date of the document)
Pages：6( 68-73 )