OOIR: Observatory of International Research

Papers

(The H4-Index of GPS Solutions is 29. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-11-01 to 2025-11-01.)

Article	Citations
M_IFCB: a MATLAB-based software for multi‑GNSS inter‑frequency clock bias estimation and forecast	95
Rigorous and fast constraints transformations at the solution level: case studies for regional and global GNSS networks	79
Optimization of undifferenced and uncombined PPP stochastic model based on covariance component estimation	65
Attitude estimation in challenging environments by integrating low-cost dual-antenna GNSS and MEMS MARG sensor	57
Vehicle mounted single-antenna GNSS spoofing detection method based on motion trajectory	54
STL-GT: graph-structured learning based transformer for GNSS positioning enhancement in urban environments	50
Enhancing smartphone-based vehicle navigation in deep urban areas using machine learning-aided PPP-RTK	48
M_FCB: an open‑source software for multi‑GNSS fractional cycle bias estimation	46
Filter and piecewise smoother on the matrix Lie group	41
Tropospheric parameters from multi-GNSS and numerical weather models: case study of severe precipitation and flooding in Germany in July 2021	39
GNSS performance degradation under meaconing in civil aviation: pseudorange and position models	38
Adaptive displacement extraction from GNSS kinematic positioning using interactive multi-model Kalman filter	38
Robust train length calculation and monitoring method using GNSS multi-constellation moving-baseline positioning resolution	37
A weighted mean temperature (Tm) augmentation method based on global latitude zone	36
Modeling of regional GNSS network using adaptive boosting algorithm: a case study in the Xinjiang Uyghur Autonomous Region	36
Multipath error extraction and mitigation based on refined wavelet level and threshold selection	36
High-precision velocity determination using mass-market Android GNSS measurements in the case of anomalous clock variations	36
MGAMNet: a multi-granularity aware and hierarchically mixed network for BDS-3 satellite clock bias prediction	34
Interannual variability of vertical land motion over High Mountain Central Asia from GPS and GRACE/GRACE-FO observations	34
Observations and positioning quality of low-cost GNSS receivers: a review	33
Toward BDS/Galileo/GPS/QZSS triple-frequency PPP instantaneous integer ambiguity resolutions without atmosphere corrections	32
Non-holonomic constraint (NHC)-assisted GNSS/SINS positioning using a vehicle motion state classification (VMSC)-based convolution neural network	32
Impact of LEO configuration on GPS precise orbit determination with un-differenced ambiguity resolution	31
Performance assessment of GNSS-IR altimetry using signal-to-noise ratio data from a Huawei P30 smartphone	31
Design of a miniaturized geodetic-grade GNSS reference antenna covering Bs band	31

Estimating urban building height based on smartphone GNSS LOS/NLOS signal classification	30
A PPP kinematic application on historical GPS data: the reprocessing of the ITASE98-99 Antarctica mission height profiles	30
Estimation of the L5 antenna phase center corrections for GPS satellites	29
Optimization design of two-layer Walker constellation for LEO navigation augmentation using a dynamic multi-objective differential evolutionary algorithm based on elite guidance	29
Pseudorange characteristics of soil-transmitted GNSS signals and their application in soil moisture content retrieval	29
Analysis of periodic terms in the DYB frame for the solar radiation pressure model of BDS-3 MEO satellites	29
Multipath mitigation in GNSS precise point positioning using multipath hierarchy for changing environments	29