Results 41 to 50 of about 145 (102)

Integration of Statistical Models and Deep Learning: A CEEMDAN‐Based Hybrid Framework for Frequency‐Domain Prediction of Polar Motion

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract High‐precision Earth Rotation Parameter (ERP) products often experience delays that range from several days to weeks. The use of precise forecasting models can effectively compensate for the impact of such delays. Based on a systematic analysis of the forecasting capabilities of the traditional harmonic least squares fitting and autoregressive
Chen Ren, Chen Wang, Zhenhong Li, Haoran Gong, Jialiang Liu   +4 more
wiley   +1 more source

Atmospheric Excitation of Length of Day Inferred From 21st Century Climate Projections

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 12, 28 June 2025.
Abstract On seasonal timescales, atmospheric angular momentum, mainly constituted by wind but also pressure effects, is known as the most important driver of Earth rotation variations reflected in those of the length of day. However, in connection with long‐term climatic changes, we additionally anticipate secular trends resulting from shifts or ...
Sigrid Böhm, David Salstein
wiley   +1 more source

Correcting Non‐Tidal Atmospheric and Oceanic Loading Displacements at the Observation, Normal Equation, and Parameter Levels in GNSS Data Analysis

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.
Abstract Non‐tidal loading (NTL) introduces surface deformation on the Earth and increases the variability in coordinates measured by space geodetic techniques. Correcting NTL displacements in Global Navigation Satellite Systems (GNSS) analysis has been discussed extensively, commonly at the parameter level.
Jungang Wang, Kyriakos Balidakis, Henryk Dobslaw, Benjamin Männel, Maorong Ge, Robert Heinkelmann, Harald Schuh   +6 more
wiley   +1 more source

Self‐Assisted First‐Fix Method for A‐BDS Receivers with Medium‐ and Long‐Term Ephemeris Extension

Mathematical Problems in Engineering, Volume 2018, Issue 1, 2018., 2018
As a sensor for standalone position and velocity determination, the BeiDou Navigation Satellite System (BDS) receiver is becoming an important part of the intelligent logistics systems under rapid development in China. The applications in the mass market urgently require the BDS receivers to improve the performance of such functions, that is, shorter ...
Zilong Shen, Jing Peng, Wenxiang Liu, Feixue Wang, Shibing Zhu, Zhongwang Wu, Antonio Elipe   +6 more
wiley   +1 more source

Earth orientation parameters from VLBI determined with a Kalman filter

Geodesy and Geodynamics, 2017
This paper introduces the reader to our Kalman filter developed for geodetic VLBI (very long baseline interferometry) data analysis. The focus lies on the EOP (Earth Orientation Parameter) determination based on the Continuous VLBI Campaign 2014 (CONT14)
Maria Karbon, Benedikt Soja, Tobias Nilsson, Zhiguo Deng, Robert Heinkelmann, Harald Schuh   +5 more
doaj   +1 more source

A Global Combination of Geodetic Techniques at the Observation Level: New Perspectives on the Terrestrial Reference Frame

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 12, December 2024.
Abstract We describe the development and assessment of a new terrestrial reference frame (TRF) based on a combination of geodetic techniques at the observation level over the period 2010–2022. Included in the solution are observations from the Global Positioning System (GPS), Satellite Laser Ranging (SLR) and Very Long Baseline Interferometry (VLBI). A
B. Haines, W. Bertiger, S. Desai, M. Ellmer, M. Heflin, D. Kuang, G. Lanyi, C. Naudet, A. Peidou, P. Ries, A. Sibois, X. Wu   +11 more
wiley   +1 more source

Analysis and combination of four technique-individual EOP time series

Geodesy and Geodynamics, 2019
Based on four intra-technique combined solutions in SINEX format, we tried at first to assess the accuracy of each single-technique Earth Orientation Parameters (EOPs) series over a past time interval of at least15 years by comparison with IERS EOP 08C04
Lizhen Lian, Jiexian Wang, Chengli Huang
doaj   +1 more source

Prospects of Predicting the Polar Motion Based on the Results of the Second Earth Orientation Parameters Prediction Comparison Campaign

Earth and Space Science, Volume 11, Issue 11, November 2024.
Abstract Growing interest in Earth Orientation Parameters (EOP) resulted in various approaches to the EOP prediction algorithms, as well as in the exploitation of distinct input data, including the observed EOP values from various operational data centers and modeled effective angular momentum functions.
Tomasz Kur, Justyna Śliwińska‐Bronowicz, Malgorzata Wińska, Henryk Dobslaw, Jolanta Nastula, Aleksander Partyka, Santiago Belda, Christian Bizouard, Dale Boggs, Sara Bruni, Lue Chen, Mike Chin, Sujata Dhar, Robert Dill, PengShuo Duan, Jose M. Ferrandiz, Junyang Gou, Richard Gross, Sonia Guessoum, Songtao Han, Robert Heinkelmann, ChengLi Huang, Christopher Irrgang, Jacek Kudrys, Jia Li, Marcin Ligas, Lintao Liu, Weitao Lu, Volker Mayer, Wei Miao, Maciej Michalczak, Sadegh Modiri, Michiel Otten, Todd Ratcliff, Shrishail Raut, Jan Saynisch‐Wagner, Matthias Schartner, Erik Schoenemann, Harald Schuh, M. Kiani Shahvandi, Benedikt Soja, Xiaoqing Su, Daniela Thaller, Maik Thomas, Guocheng Wang, Yuanwei Wu, CanCan Xu, Xueqing Xu, Xinyu Yang, Xin Zhao, Zhijin Zhou   +50 more
wiley   +1 more source

Impact of reference EOP time series on EOP prediction evaluation

Earth, Planets and Space
This study evaluates the impact of different reference time series on the prediction of various Earth orientation parameters (EOP), namely, x and y pole coordinates, and the difference between Universal Time and Coordinated Universal Time (UT1–UTC).
Aleksander Partyka, Justyna Śliwińska-Bronowicz, Henryk Dobslaw, Jolanta Nastula, Małgorzata Wińska   +4 more
doaj   +1 more source

Research and Design of BPM Shortwave Time Signal Modulation Technology Based on Chirp

Remote Sensing
The shortwave time service system is a vital land-based wireless time service solution, serving as a supplement and backup to the global navigation satellite system. It ensures that time users can access reliable timings, especially in extreme situations.
Jiangbin Yuan, Shifeng Li, Wenhe Yan, Yuhang Song, Chaozhong Yang, Zhaopeng Hu, Dafeng Yang, Yu Hua   +7 more
doaj   +1 more source