空间科学学报2025，Vol.45Issue(1)：235-242,8.DOI:10.11728/cjss2025.01.2023-0120
偏远林区单北斗/多模GNSS实时单点定位性能比较
Comparison on Real-time Single Point Positioning Performance of Single Beidou/Multi-mode GNSS in Remote Forested Areas
摘要
Abstract
In remote forested areas,reference stations are sparse,making network communication diffi-cult.There are significant multipath effects,causing large cycle slips during observations,making it chal-lenging to achieve high-precision RTK(Real-Time Kinematic)positioning using double-difference meth-ods.Considering the hardware delay introduced by broadcast ephemeris and clock errors,a pseudorange Single-Point Positioning(SPP)model for single Beidou(BDS)/multi-mode Global Navigation Satellite System(GNSS)single-frequency and ionosphere-free combinations is derived.Correction methods for pseudorange hardware delays caused by different system clock error references is introduced.Accuracy is evaluated using measured vehicle dynamic observation data in forested areas,and the achievable posi-tioning accuracy of current satellite navigation is determined based on single-frequency SPP and iono-sphere-free SPP in remote forested regions.The results show that under the condition of no correction data from reference stations in the forest area,the plane accuracy of BDS and GPS/Galileo/BDS SPP positioning can reach 2 m.Compared with single-frequency SPP,the plane accuracy of Beidou,GPS/Galileo/BDS ionosphere-free SPP is improved by about 0.5 m and 0.4 m respectively,and the SPP based on the ionosphere-free combination has better positioning performance.关键词
北斗卫星导航系统/伪距单点定位/消电离层组合/偏远林区/动态定位Key words
Beidou navigation satellite system/Single point positioning/Ionosphere-free/Remote forest area/Kinematic positioning分类
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叶少春,徐文兵,尹潇..偏远林区单北斗/多模GNSS实时单点定位性能比较[J].空间科学学报,2025,45(1):235-242,8.基金项目
国家自然科学基金项目(42074014)和浙江农林大学人才基金项目(2021LFR057)共同资助 （42074014）
