全球定位系统2025，Vol.50Issue(6)：9-20,12.DOI:10.12265/j.gnss.2025099
面向速度场反演的多测站联合PPP地壳形变监测方法研究
Multi-station PPP network solutions for robust velocity field inversion of crustal deformation
摘要
Abstract
To enhance the accuracy and robustness of GNSS crustal deformation monitoring,this study develops a high-precision regional solution that overcomes the ambiguity-fixing difficulty and rigid constraints of conventional undifferenced PPP.The method forms a multi-station PPP network that reconstructs fixable double-difference integer ambiguities,applies adaptive prior constraints to each station,determines the optimal stochastic model via power-spectral analysis,and inverts the regional velocity field with maximum-likelihood estimation.Validation using 2021-2023 observations from 10 sites in north-western Australia,single-day positioning accuracies better than 1 cm horizontally and 2 cm vertically.Introducing a white noise-flicker noise model into the coordinate time series provides realistic velocity uncertainties.The derived field shows a uniform northeastward motion of approximately 70 mm/a and vertically negligible yet strongly seasonal displacements.By jointly exploiting the precision of undifferenced observations and the reliability of fixed double-differenced ambiguities,the proposed approach enables robust large-scale velocity field inversion and offers a dependable tool for plate kinematics and crustal deformation research.关键词
精密单点定位(PPP)/GNSS网数据处理/时间序列/速度场反演/形变监测Key words
PPP/GNSS network data processing/time series/velocity field/crustal deformation monit-oring分类
天文与地球科学引用本文复制引用
马祥语,罗小敏,张宝成..面向速度场反演的多测站联合PPP地壳形变监测方法研究[J].全球定位系统,2025,50(6):9-20,12.基金项目
湖北省技术创新计划(2024BAB027) （2024BAB027）
国家重点研发计划(2022YFB3903903) （2022YFB3903903）
中国科学院国际合作项目(314GJHZ2022034FN) （314GJHZ2022034FN）
