（1）Jian Wang^#,Tianhe Xu*, Wenfeng Nie, Guochang Xu. A new algorithm for multi-baseline solution based on equivalence principle. Measurement Science and Technology, 2021, 32: 015015(15pp). DOI: 10.1088/1361-6501/abac27（SCI, IF=2.046）

  （2）Honglei Yang#, Tianhe Xu*, Wenfeng Nie, Zhenlong Fang, Min Li, Meiqian Guan. GLONASS precise orbit determination based on L-band and SLR data. Measurement Science and Technology,
 2021, 32: 045007(16pp). DOI: 10.1088/1361-6501/abd1fe（SCI, IF=2.046）

  （3）Tong Liu#, Tianhe Xu, Wenfeng Nie, Mowen Li, Zhenlong Fang, Yujun Du, Yiping Jiang, Guochang Xu*. Optimal Independent Baseline Searching for Global GNSS Networks. Journal of 
Surveying Engineering, 2021, 147（1）,05020010. DOI: 10.1061/(ASCE)SU.1943-5428.0000336. (SCI, IF=1.986)

  （4）Song Li#, Tianhe Xu*, Nan Jiang, Honglei Yang, Shuaimin Wang, Zhen Zhang. Regional Zenith Tropospheric Delay Modeling Based on Least Squares Support Vector Machine Using GNSS 
and ERA5 Data. Remote Sensing, 2021, 13(5): 1004. DOI: 10.3390/rs13051004（SCI, IF=4.848）

  （5）Fan Gao#, Tianhe Xu*, Xinyue Meng, Nazi Wang, Yunqiao He, Baojiao Ning. A Coastal Experiment for GNSS-R Code-Level Altimetry Using BDS-3 New Civil Signals. Remote Sensing, 
2021, 13(7): 1378. DOI: 10.3390/rs13071378（SCI, IF=4.848）
 （6）Yunqiao He#, Fan Gao*, Tianhe Xu, Xinyue Meng, Nazi Wang. Coastal Altimetry Using Interferometric Phase From GEO Satellite in Quasi-Zenith Satellite System. IEEE 
Geoscience and Remote Sensing Letters. 2021, DOI: 10.1109/LGRS.2021.3068376. （SCI, IF=3.833）

（7）Jian Wang^#,Tianhe Xu^*, Wenfeng Nie, Guochang Xu. A Simplified Processing Algorithm for Multi-baseline RTK Positioning in Urban Environments, Measurement. 2021,179, 109446.DOI:https://doi.org/10.1016/j.measurement.2021.109446.（SCI, IF=3.927）

（8）Huijie Xue^#,Tianhe Xu^*, Wenfeng Nie, Yuguo Yang, Qingsong Ai. An Enhanced Prediction Model for BDS Ultra-Rapid Clock Offset by Combining Singular Spectrum Analysis, Robust Estimation and Gray Model. Measurement Science and Technology, 2021, 32, 105002(11pp).DOI: 10.1088/1361-6501/abfcec（SCI, IF=2.046）

（9）Junting Wang^#,Tianhe Xu*, Yangfan Liu, Dapeng Mu. Kalman Filter Based Acoustic Positioning of Deep Seafloor Datum Point with Two-step Systematic Error Estimation. Applied Ocean Research, 2021 (114): 102817. DOI:https://doi.org/10.1016/j.apor.2021.102817（SCI, IF=2.979）

（10）Yujun Du^#, Fangzhao Zhang,Tianhe Xu*, Fan Gao, Guochang Xu. Correction of Precession-Nutation and Polar Motion in Analytical solutions of Satellite Equations of Motion. Advances in Space Research, 2021, 68(10): 4229-4241. DOI: https:// doi.org/10.1016/j.asr.2021.07.041（SCI, IF=2.152）

（11）Min Li^#,Tianhe Xu*, Haibo Ge, Meiqian Guan, Honglei Yang, Zhenlong Fang, Fan Gao. LEO-Constellation-Augmented BDS Precise Orbit Determination Considering Spaceborne Observational Errors. Remote Sensing, 2021, 13(16), 3189. DOI: 10.3390/rs13163189（SCI, IF=4.848）

（12）Chao Chen^#, Guorui Xiao, Guobin Chang*,Tianhe Xu, Liu Yang. Assessment of GPS/Galileo/BDS Precise Point Positioning with Ambiguity Resolution Using Products from Different Analysis Centers. Remote Sensing, 2021, 13(16), 3266. DOI: 10.3390/rs13163266（SCI, IF=4.848）

（13）Yangfan Liu^#,Tianhe Xu*, Junting Wang, Dapeng Mu. Multibeam seafloor topography distortion correction based on SVP inversion. Journal of Marine Science and Technology, 2021, DOI: 10.1007/s00773-021-00845-7（SCI, IF=1.800）

（14）Chunhua Jiang^#,Tianhe Xu*, Yujun Du, Zhangzhen Sun and Guochang Xu. A parallel equivalence algorithm based on MPI for GNSS Data Processing. Journal of Spatial Science. 2021, 66(3): 513-532. DOI: 10.1080/14498596.2019.1696718.（SCI, IF=1.981）

（15）Chunhua Jiang^#,Tianhe Xu*, Wenfeng Nie, Zhenlong Fang, Shuaimin Wang, Aigong Xu. A Parallel Approach for Multi-GNSS Ultra-Rapid Orbit Determination.Remote Sensing, 2021, 13(17), 3464. DOI: 10.3390/rs13173464（SCI, IF=4.848）

（16）Junting Wang^#,Tianhe Xu*, Bingsheng Zhang, Wenfeng Nie. Underwater acoustic positioning based on the robust zero-difference Kalman filter.Journal of Marine Science and Technology, 2021, 26: 734-749. DOI: 10.1007/s00773-020-00766-x.（SCI, IF=1.800）

（17）Nazi Wang^#, Jie Wang,Tianhe Xu*, Fan Gao, Yunqiao He, Xinyue Meng. Applications of ground-based multipath reflectometry based on combinations of pseudorange and carrier phase observations of multi-GNSS dual-frequency signals. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021, Vol. 14, 9557-9570. DOI: 10.1109/JSTARS.2021.3112683.（SCI, IF=3.827）

（18）Kaifei He^#*,Tianhe Xu, Christoph Förste, Svetozar Petrovic, Zhenjie Wang, Yumiao Tian, Frank Flechtner. Integrated GNSS Doppler velocity determination for GEOHALO airborne gravimetry. GPS Solutions 2021, 25: 146. https://doi.org/10.1007/s10291-021-01183-2.（SCI, IF=4.066）

（19）Lili Jing^#, Lei Yang*, Wentao Yang,Tianhe Xu, Fan Gao, Yilin Lu, Bo Sun, Dongkai Yang, Xuebao Hong, Nazi Wang, Hongliang Ruan and José Darrozes. Robust Kalman Filter Soil Moisture Inversion Model Using GPS SNR Data - A Dual-Band Data Fusion Approach.Remote Sensing, 2021, 13(19), 4013. DOI: 10.3390/rs13194013（SCI, IF=4.848）

（20）Yunqiao He^#,Tianhe Xu*, Fan Gao, Nazi Wang, Xinyue Meng, Baojiao Ning. Analysis and Mitigation of Crosstalk Effect on Coastal GNSS-R Code-Level Altimetry Using L5 Signals from QZSS GEO.Remote Sensing, 2021, 13(22), 4553. DOI: 10.3390/rs13224553（SCI, IF=4.848）

（21）Wentao Yang^#, Fan Gao*,Tianhe Xu, Nazi Wang, Jinsheng Tu, Lili Jing, Yhui Kong.Daily Flood Monitoring Based on Spaceborne GNSS-R Data: A Case Study on Henan, China.Remote Sensing, 2021, 13(22), 4561. DOI: 10.3390/rs13224561（SCI, IF=4.848）

（23）周锋^#，徐天河^*. GPS/BDS/Galileo三频精密单点定位模型及性能分析[J].测绘学报, 2021, 50(1): 61-70.DOI:10.11947/j.AGCS.2021.20200146(EI)

（24）储倜^#，贺凯飞^*，高凡，贺匀峤，孟馨悦，徐天河.基于QZSS L1信号的岸基GNSS-R码延迟海面测高研究，北京航空航天大学学报，2021, http://doi.org/10.13700/j.bh.1001-5965.2020.0630.(EI)

（25）Song Li^#,Tianhe Xu^*, Nan Jiang.Tropospheric Delay Modeling Based on Multi-source Data Fusion and Machine Learning Algorithms. China Satellite Navigation Conference (CSNC 2021) Proceedings, Lecture Notes in Electrical Engineering 772，pp. 145-158, 2021. https://doi.org/10.1007/978-981-16-3138-2_15（EI）

（26）Wentao Yang^#,Tianhe Xu^*, Nazi Wang, Fan Gao, Yunqiao He.Research on the Method of Precisely Removing Open Water in the Retrieval of Soil Moisture by Spaceborne GNSS-R. China Satellite Navigation Conference (CSNC 2021) Proceedings, Lecture Notes in Electrical Engineering 772，pp. 22-32, 2021. https://doi.org/10.1007/978-981-16-3138-2_3（EI）

（27）Zhen Zhang^#,Tianhe Xu^*, Fan Gao, Shuaimin Wang, Song Li.Analysis of COSMIC-2 Atmospheric Boundary Layer Detection Ability. China Satellite Navigation Conference (CSNC 2021) Proceedings, Lecture Notes in Electrical Engineering 772，pp. 43-53, 2021. https://doi.org/10.1007/978-981-16-3138-2_5（EI）