全球定位系统2024，Vol.49Issue(1)：89-93,5.DOI:10.12265/j.gnss.2023109
GNSS观测值类型对短基线大地高差精度的影响分析
Analysis of the impact of GNSS observation types on the accuracy of short baseline geodetic height difference
摘要
Abstract
Based on observation data from a C-grade network in a city,the impact of four different baseline calculation strategies on the accuracy of geodetic height difference for short baselines is analyzed,which uses different raw observations and ionosphere-free combination.The result shows that it is difficult to evaluate the baseline processing accuracy of different calculation strategies through the analysis of repeated baseline differences.Therefore,external verification of baseline results was carried out through the combination of second-class leveling measurements and a quasi-geoid model.It is found that there is a systematic error of about 2.2 cm in the geodetic height difference in the results of using ionosphere-free combination,while the results of using raw dual-frequency measurements have the highest accuracy which is the best strategy for processing short baselines.关键词
GNSS/短基线/大地高/似大地水准面模型Key words
Global Navigation Satellite System(GNSS)/short baseline/geodetic height/quasi-geoid model分类
天文与地球科学引用本文复制引用
王恒毅,谭荣杰,杨瀚融,陈华..GNSS观测值类型对短基线大地高差精度的影响分析[J].全球定位系统,2024,49(1):89-93,5.基金项目
国家重点研发计划项目(2022YFC3005502) （2022YFC3005502）
湖北省科技重大专项(2022AAA002) （2022AAA002）
