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Vectorial integer bootstrapping of best integer equivariant estimation (VIB-BIE) for efficient and reliable GNSS ambiguity resolution J. Geod. (IF 4.4) Pub Date : 2024-04-17 Weikai Miao, Bofeng Li, Yang Gao, Guang’e Chen
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Moving mountains: reevaluating the elevations of Colorado mountain summits using modern geodetic techniques J. Geod. (IF 4.4) Pub Date : 2024-04-15 Kevin Ahlgren, Derek van Westrum, Brian Shaw
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Potential of cold-atom airborne gravimetry to improve coastal gravity field and quasigeoid modelling J. Geod. (IF 4.4) Pub Date : 2024-04-13 Dinh Toan Vu, Sylvain Bonvalot, Lucia Seoane, Germinal Gabalda, Dominique Remy, Sean Bruinsma, Yannick Bidel, Alexandre Bresson, Nassim Zahzam, Didier Rouxel, Corinne Salaün, Marie-Françoise Lalancette, René Forsberg, Tim Jensen, Olivier Jamet
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Accounting for residual errors in atmosphere–ocean background models applied in satellite gravimetry J. Geod. (IF 4.4) Pub Date : 2024-04-10 Linus Shihora, Zhijun Liu, Kyriakos Balidakis, Josefine Wilms, Christoph Dahle, Frank Flechtner, Robert Dill, Henryk Dobslaw
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Simulation analysis on resonance and direct approaches for determining free core nutation parameters with celestial pole offsets J. Geod. (IF 4.4) Pub Date : 2024-04-09 Xiaoming Cui, Ning Li, Lizhuo Gong, Weiwei Yang, Jianqiao Xu, Jiangcun Zhou, Mingqiang Hou, Heping Sun
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A refined full-spectrum temperature-induced subsurface thermal expansion model and its contribution to the vertical displacement of global GNSS reference stations J. Geod. (IF 4.4) Pub Date : 2024-04-08 Zhao Li, Ran Lu, Weiping Jiang, Danan Dong, Jintao Lei, Yang Lu, Xin Ding, Kaichun Yang, Hua Chen, Qusen Chen
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RANSAC-based instantaneous real-time kinematic positioning with GNSS triple-frequency signals in urban areas J. Geod. (IF 4.4) Pub Date : 2024-04-06
Abstract The demand for high-precision positioning has risen substantially in modern urban settings. In that regard, Global Navigation Satellite Systems (GNSS) offer several advantages such as global coverage, real-time capability, high accuracy, ease of use, and cost-effectiveness. The accuracy of GNSS-based positioning, however, suffers in urban environments due to signal blockage, reflection, and
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Global, spatially explicit modelling of zenith wet delay with XGBoost J. Geod. (IF 4.4) Pub Date : 2024-04-05
Abstract Radio signals transmitted by Global Navigation Satellite System (GNSS) satellites experience tropospheric delays. While the hydrostatic part, referred to as zenith hydrostatic delay (ZHD) when mapped to the zenith direction, can be analytically modelled with sufficient accuracy, the wet part, referred to as zenith wet delay (ZWD), is much more difficult to determine and needs to be estimated
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Assessment of length-of-day and universal time predictions based on the results of the Second Earth Orientation Parameters Prediction Comparison Campaign J. Geod. (IF 4.4) Pub Date : 2024-03-20
Abstract Predicting Earth Orientation Parameters (EOP) is crucial for precise positioning and navigation both on the Earth’s surface and in space. In recent years, many approaches have been developed to forecast EOP, incorporating observed EOP as well as information on the effective angular momentum (EAM) derived from numerical models of the atmosphere, oceans, and land-surface dynamics. The Second
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Factor graph-based PPP-RTK for accurate and robust positioning in urban environments J. Geod. (IF 4.4) Pub Date : 2024-03-18 Xin Li, Xingxing Li, Xuanbin Wang, Hanyu Chang, Yuxuan Tan, Zhiheng Shen
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Correcting flawed orbits with significant along-track offset in LOLA data to remove apparent noise in DEM J. Geod. (IF 4.4) Pub Date : 2024-03-16
Abstract The lunar orbiter laser altimeter (LOLA) onboard the lunar reconnaissance orbiter has performed high-precision, full-coverage, and high-density laser ranging observations for the entire lunar surface since its launch. Statistics have shown that LOLA has collected 6.94 billion effective altimeter data up to June 2022. Most of the typical orbits in the LOLA dataset have a high quality and exhibit
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A complete closed-form method for transformation from Cartesian to geodetic coordinates J. Geod. (IF 4.4) Pub Date : 2024-03-05
Abstract By introducing the auxiliary variable with respect to the reduced latitude, a new closed-form method for transforming Cartesian to geodetic coordinates has been proposed based on the solution of a special constructed unary quartic equation. The algorithm comes with rigorous and concise procedure of root-finding. Moreover, through theoretical analysis, different approaches with respective pros
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Modeling trends and periodic components in geodetic time series: a unified approach J. Geod. (IF 4.4) Pub Date : 2024-03-04
Abstract Geodetic time series are usually modeled with a deterministic approach that includes trend, annual, and semiannual periodic components having constant amplitude and phase-lag. Although simple, this approach neglects the time-variability or stochasticity of trend and seasonal components, and can potentially lead to inadequate interpretations, such as an overestimation of global navigation satellite
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Triangulation of the Earth’s surface and its application to the geodetic velocity field modelling J. Geod. (IF 4.4) Pub Date : 2024-02-23 Sandi Berk
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Multi-epoch PPP-RTK corrections: temporal characteristics, pitfalls and user-impact J. Geod. (IF 4.4) Pub Date : 2024-02-19
Abstract PPP-RTK corrections, aiding GNSS users to achieve single-receiver integer ambiguity-resolved parameter solutions, are often estimated in a recursive manner by a provider. Such recursive, multi-epoch, estimation of the corrections relies on a set of \(\mathcal {S}\) -basis parameters that are chosen by the provider so as to make the underlying measurement setup solvable. As a consequence, the
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A novel ionospheric TEC mapping function with azimuth parameters and its application to the Chinese region J. Geod. (IF 4.4) Pub Date : 2024-02-12 Xingliang Huo, Yuanliang Long, Haojie Liu, Yunbin Yuan, Qi Liu, Ying Li, Mingming Liu, Yanwen Liu, Weihong Sun
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A unified model of multi-GNSS and multi‑frequency precise point positioning for the joint estimation of ionospheric TEC and time-varying receiver code bias J. Geod. (IF 4.4) Pub Date : 2024-02-07
Abstract The short-term variability in receiver code biases (RCBs) has been identified as a prominent source of error leading to the degradation of precise point positioning (PPP) performance and ionospheric total electron content (TEC) estimation accuracy. To minimize the adverse impact of RCB variability, this study extends the modified PPP (MPPP) method from the GPS only dual-frequency (DF) model
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Minimum-entropy velocity estimation from GPS position time series J. Geod. (IF 4.4) Pub Date : 2024-02-02 Jarir Saleh, Richard A. Bennett, Simon D. P. Williams
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Reconstruction of global ionospheric TEC maps from IRI-2020 model based on deep learning method J. Geod. (IF 4.4) Pub Date : 2024-02-01
Abstract The Total Electron Content (TEC) computed from ionospheric models is a widely used parameter for characterizing the morphological structure of the ionosphere. The global TEC maps from empirical models, like the International Reference Ionosphere (IRI) model, have limited accuracy compared to those calculated by dual-frequency measurements from the global navigation satellite systems (GNSS)
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The miniSLR: a low-budget, high-performance satellite laser ranging ground station J. Geod. (IF 4.4) Pub Date : 2024-01-29 Daniel Hampf, Felicitas Niebler, Tristan Meyer, Wolfgang Riede
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An improved equation of latitude and a global system of graticule distance coordinates J. Geod. (IF 4.4) Pub Date : 2024-01-08 Geoffrey Blewitt
Two innovations are presented for coordinate time-series computation. First, an improved solution is given to a century-old problem, that is the non-iterative computation of conventional geodetic (CG: latitude, longitude, height) coordinates from geocentric Cartesian (GC: x, y, z) coordinates. The accuracy is 1 nm for heights < 500 km and < 10−15 rad for latitude at any point, terrestrial or outer
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Multi-constellation GNSS interferometric reflectometry for tidal analysis: mitigations for K1 and K2 biases due to GPS geometrical errors J. Geod. (IF 4.4) Pub Date : 2024-01-02 Dongju Peng, Yunung Nina Lin, Jui-Chi Lee, Hsuan-Han Su, Emma M. Hill
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Geodesics on an arbitrary ellipsoid of revolution J. Geod. (IF 4.4) Pub Date : 2023-12-30 Charles F. F. Karney
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An iterative and shrinking generalized ridge regression for ill-conditioned geodetic observation equations J. Geod. (IF 4.4) Pub Date : 2023-12-29 Yangkang Yu, Ling Yang, Yunzhong Shen, Wei Wang, Bofeng Li, Qiujie Chen
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Manufacturer calibrations of GPS transmit antenna phase patterns: a critical review J. Geod. (IF 4.4) Pub Date : 2023-12-27 Oliver Montenbruck, Peter Steigenberger, Torsten Mayer-Gürr
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Monitoring urban heat island intensity based on GNSS tomography technique J. Geod. (IF 4.4) Pub Date : 2023-12-19 Pengfei Xia, Wei Peng, Peng Yuan, Shirong Ye
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Sequential GNSS-Acoustic seafloor point positioning with modeling of sound speed variation J. Geod. (IF 4.4) Pub Date : 2023-12-12 Yang Liu, Menghao Li, Yanxiong Liu, Guanxu Chen, Qiuhua Tang, Yikai Feng, Yuanlan Wen
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Validation of global ionospheric models using long-term observations of pulsar Faraday rotation with the LOFAR radio telescope J. Geod. (IF 4.4) Pub Date : 2023-12-13 Nataliya K. Porayko, Maaijke Mevius, Manuel Hernández-Pajares, Caterina Tiburzi, German Olivares Pulido, Qi Liu, Joris P. W. Verbiest, Jörn Künsemöller, Moochickal Ambalappat Krishnakumar, Ann-Sofie Bak Nielsen, Marcus Brüggen, Victoria Graffigna, Ralf-Jürgen Dettmar, Michael Kramer, Stefan Osłowski, Dominik J. Schwarz, Golam M. Shaifullah, Olaf Wucknitz
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A note on the topographic bias of a right circular cylinder and a cone J. Geod. (IF 4.4) Pub Date : 2023-12-08 Yan Ming Wang
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High-resolution sub-canopy topography mapping via TanDEM-X DEM combined with future P-band BIOMASS PolInSAR data J. Geod. (IF 4.4) Pub Date : 2023-12-09 Jianjun Zhu, Zhiwei Liu, Haiqiang Fu, Cui Zhou, Yi Zhou, Huiqiang Wang, Yanzhou Xie
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Real-time GNSS tropospheric delay estimation with a novel global random walk processing noise model (GRM) J. Geod. (IF 4.4) Pub Date : 2023-12-07 Zhilu Wu, Cuixian Lu, Yuxuan Tan, Yuxin Zheng, Yang Liu, Yanxiong Liu, Ke Jin
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Towards the tropospheric ties in the GPS, DORIS, and VLBI combination analysis during CONT14 J. Geod. (IF 4.4) Pub Date : 2023-12-04 Changyong He, Arnaud Pollet, David Coulot, Vladimir Schott-Guilmault, Felix Perosanz
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Offsets in tide-gauge reference levels detected by satellite altimetry: ten case studies J. Geod. (IF 4.4) Pub Date : 2023-12-03 R. D. Ray, M. J. Widlansky, A. S. Genz, P. R. Thompson
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Kalman filter-based integration of GNSS and InSAR observations for local nonlinear strong deformations J. Geod. (IF 4.4) Pub Date : 2023-12-01 Damian Tondaś, Maya Ilieva, Freek van Leijen, Hans van der Marel, Witold Rohm
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Estimation of GPS-observed ocean tide loading displacements with an improved harmonic analysis in the northwest European shelf J. Geod. (IF 4.4) Pub Date : 2023-11-24 Hao Wang , Na Wei, Min Li, Shin-Chan Han, Rongxin Fang, Qile Zhao
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Terrestrial reference frames and their internal accuracy at coordinate system level J. Geod. (IF 4.4) Pub Date : 2023-11-20 Christopher Kotsakis, Miltiadis Chatzinikos
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On the harmonic correction in the gravity field determination J. Geod. (IF 4.4) Pub Date : 2023-11-20 Meng Yang, Xiaopeng Li, Miao Lin, Xiao-Le Deng, Wei Feng, Min Zhong, C. K. Shum, Daniel R. Roman
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Realization and validation of GLONASS triple-frequency PPP ambiguity resolution with new CDMA L3 signals J. Geod. (IF 4.4) Pub Date : 2023-11-19 Fan Zhang, Hongzhou Chai, Xin Li, Min Wang, Zhenqiang Du, Xu Feng, Qin Wu, Qiankun Zhang
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An improved Molodensky-type modification of the Stokes formula and reduced bias in the spectral combination and variance-minimizing ULSM J. Geod. (IF 4.4) Pub Date : 2023-11-15 Linshan Zhong, Qiong Wu
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Spherical harmonic coefficients of isotropic polynomial functions with applications to gravity field modeling J. Geod. (IF 4.4) Pub Date : 2023-11-15 Dimitrios Piretzidis, Christopher Kotsakis, Stelios P. Mertikas, Michael G. Sideris
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Digital terrain, surface, and canopy height model generation with dual-baseline low-frequency InSAR over forest areas J. Geod. (IF 4.4) Pub Date : 2023-11-13 Jianjun Zhu, Yanzhou Xie, Haiqiang Fu, Changcheng Wang, Huiqiang Wang, Zhiwei Liu, Qinghua Xie
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Comments and corrections to: “Ellipsoidal spectral properties of the Earth’s gravitational potential and its first and second derivatives” by Bölling and Grafarend (2005) in J. Geod. 79(6-7):300-330 J. Geod. (IF 4.4) Pub Date : 2023-11-14 Michal Šprlák
In this contribution, we comment on and thoroughly identify errors which occur in the research article titled “Ellipsoidal spectral properties of the Earth’s gravitational potential and its first and second derivatives” by Bölling and Grafarend (2005) published in J.Geod. 79(6-7):300-330. The major issues affecting the main theoretical results by Bölling and Grafarend (J Geod 79(6-7):300-330, 2005)
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Multi-GNSS ultra-rapid orbit determination through epoch-parallel processing J. Geod. (IF 4.4) Pub Date : 2023-11-04 Longjiang Tang, Jungang Wang, Huizhong Zhu, Maorong Ge, Aigong Xu, Harald Schuh
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GNSS visibility and performance implications for the GENESIS mission J. Geod. (IF 4.4) Pub Date : 2023-10-31 Oliver Montenbruck, Peter Steigenberger, Steffen Thoelert, Daniel Arnold, Grzegorz Bury
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On the importance of accurate pole and station coordinates for VLBI Intensive baselines J. Geod. (IF 4.4) Pub Date : 2023-11-01 Lisa Kern, Matthias Schartner, Johannes Böhm, Sigrid Böhm, Axel Nothnagel, Benedikt Soja
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An improved joint modeling method for multipath mitigation of GPS, BDS-3, and Galileo overlapping frequency signals in typical environments J. Geod. (IF 4.4) Pub Date : 2023-10-31 Ran Lu, Wen Chen, Zhao Li, Danan Dong, Weiping Jiang, Zhiren Wang, Luyao Huang, Xinlei Duan
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Tidal harmonics retrieval using GNSS-R dual-frequency complex observations J. Geod. (IF 4.4) Pub Date : 2023-10-30 Mahmoud Rajabi, Mostafa Hoseini, Hossein Nahavandchi, Milad Asgarimehr, Maximilian Semmling, Markus Ramatschi, Mehdi Goli, Jens Wickert
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The Tikhonov-L-curve regularization method for determining the best geoid gradients from SWOT altimetry J. Geod. (IF 4.4) Pub Date : 2023-10-28 Daocheng Yu, Cheinway Hwang, Huizhong Zhu, Sihao Ge
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Full-Bayes GNSS-A solutions for precise seafloor positioning with single uniform sound speed gradient layer assumption J. Geod. (IF 4.4) Pub Date : 2023-10-26 Shun-ichi Watanabe, Tadashi Ishikawa, Yuto Nakamura, Yusuke Yokota
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Anthropocene isostatic adjustment on an anelastic mantle J. Geod. (IF 4.4) Pub Date : 2023-10-27 Erik R. Ivins, Lambert Caron, Surendra Adhikari
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Strategies to remove hydrological effects in continuous gravity time series J. Geod. (IF 4.4) Pub Date : 2023-10-27 Maxime Mouyen
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A geometry-based method for the rapid deployment of a UAV pseudolite navigation system in a target area J. Geod. (IF 4.4) Pub Date : 2023-10-27 Xin Yang, Wenxiang Liu, Xiaozhou Ye, Xiangjun Li, Shipeng Wei, Feixue Wang
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On the initialization of the sensitivity matrix in variational equations J. Geod. (IF 4.4) Pub Date : 2023-10-09 Dennis Milbert, Christopher Jekeli
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Realizing the European Vertical Reference System using model-based hydrodynamic leveling data J. Geod. (IF 4.4) Pub Date : 2023-09-29 Y. Afrasteh, D. C. Slobbe, M. Sacher, M. Verlaan, V. Jahanmard, R. Klees, H. Guarneri, L. Keyzer, J. Pietrzak, M. Snellen, F. Zijl
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Combination and SLR validation of IGS Repro3 orbits for ITRF2020 J. Geod. (IF 4.4) Pub Date : 2023-10-01 Radosław Zajdel, Salim Masoumi, Krzysztof Sośnica, Filip Gałdyn, Dariusz Strugarek, Grzegorz Bury
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Absolute field calibration of receiver antenna phase center models for GPS/BDS-3 signals J. Geod. (IF 4.4) Pub Date : 2023-09-19 Renyu Zhou, Zhigang Hu, Qile Zhao, Guo Chen, Jun Tao
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Reduction of apparent temporal variations of tidal parameters by a proper local response model J. Geod. (IF 4.4) Pub Date : 2023-09-12 Adam Ciesielski, Thomas Forbriger, Walter Zürn, Andreas Rietbrock
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Variance–covariance analysis of two high-resolution regional least-squares quasi-geoid models J. Geod. (IF 4.4) Pub Date : 2023-08-24 R. Klees, D. C. Slobbe
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Combining ERA5 data and CYGNSS observations for the joint retrieval of global significant wave height of ocean swell and wind wave: a deep convolutional neural network approach J. Geod. (IF 4.4) Pub Date : 2023-08-24 Jinwei Bu, Kegen Yu, Jun Ni, Weimin Huang
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Are there detectable common aperiodic displacements at ITRF co-location sites? J. Geod. (IF 4.4) Pub Date : 2023-08-22 Maylis de La Serve, Paul Rebischung, Xavier Collilieux, Zuheir Altamimi, Laurent Métivier