Results 31 to 40 of about 150 (111)

Intraseasonal Variations in Atmospheric and Oceanic Excitation of Length‐of‐Day

Earth and Space Science, Volume 8, Issue 3, March 2021., 2021
Abstract Like the seasonal and interannual variations in length‐of‐day (LOD), variations on intraseasonal timescales (periods shorter than 183 days) are also predominantly caused by changes in the angular momentum of the zonal winds. But the smaller intraseasonal LOD excitations from atmospheric surface pressure, oceanic currents, and the ocean bottom ...
Nan Yu, Jim Ray, Jiancheng Li, Gang Chen, Nengfang Chao, Wei Chen   +5 more
wiley   +1 more source

VGOS VLBI Intensives Between macgo12m and wettz13s for the Rapid Determination of UT1-UTC

, 2023
AbstractIn this work, we present a status update and preliminary results of the designated research and development VLBI Intensive program VGOS-INT-S, observed between macgo12m and wettz13s for the rapid determination of the Earth’s phase of rotation, expressed via UT1-UTC.
Schartner, Matthias, Petrov, Leonid, Plötz, Christian, Lemoine, Frank G., Terrazas, Eusebio, Soja, Benedikt   +5 more
openaire   +2 more sources

Combined SAI-SHAO prediction of Earth Orientation Parameters since 2012 till 2017

Geodesy and Geodynamics, 2018
As the participants of Earth Orientation Parameters Combination of Prediction Pilot Project (EOPC PPP), Sternberg Astronomical Institute of Moscow State University (SAI) and Shanghai Astronomical Observatory (SHAO) have accumulated ∼1800 days of Earth ...
Leonid Zotov, Xueqing Xu, Yonghong Zhou, Arkadiy Skorobogatov   +3 more
doaj   +1 more source

Impact of erroneous station coordinates on the estimation of UT1-UTC with VLBI Intensive sessions

, 2022
<p>So-called Intensives are one-hour-long VLBI sessions including mostly two stations, which are routinely observed to derive the Earth's phase of rotation expressed through the parameter UT1-UTC. Due to the limitation in time and participating stations, only a few parameters of interest can be estimated during the analysis, whereas ...
Lisa Kern, Matthias Schartner, Johannes Böhm, Sigrid Böhm, Axel Nothnagel, Benedikt Soja   +5 more
openaire   +2 more sources

Mission Design and Early Navigation Operations for the Lunar Trailblazer Mission

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Lunar Trailblazer is a smallsat mission launched on 27 February 2025 as a secondary payload with the Intuitive Machines IM‐2 mission. After insertion into a near‐polar circular orbit around the Moon, the mission's goal was to search and characterize lunar water, primarily looking for ice in permanently shadowed craters and water bound in ...
Gregory Lantoine, Julie Bellerose, Andrew D. Cox, Brian Kennedy, Zubin Olikara, Stefano Campagnola, David Garza, Sarah Elizabeth McCandless, Erica Jenson, Burton Yale, Julie Kangas, Mark Ryne, Tomas Martin‐Mur, Aimar Negrete   +13 more
wiley   +1 more source

Determination of Global Geodetic Parameters Using Satellite Laser Ranging Measurements to Sentinel-3 Satellites

Remote Sensing, 2019
Sentinel-3A/3B (S3A/B) satellites are equipped with a number of precise instruments dedicated to the measurement of surface topography, sea and land surface temperatures and ocean and land surface color.
Dariusz Strugarek, Krzysztof Sośnica, Daniel Arnold, Adrian Jäggi, Radosław Zajdel, Grzegorz Bury, Mateusz Drożdżewski   +6 more
doaj   +1 more source

Improving the Accuracy of Polar Motion Prediction by Combining Least Squares and the iTransformer Model

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract Polar motion prediction is an important means to study the dynamics of Earth's rotation and detect the internal structure of the Earth. This paper proposes an LS + iTransformer method that combines the least squares (LS) method with the iTransformer deep learning model. Using IERS EOP 20 C04 data from 2000 to 2022, Fast Fourier Transform (FFT)
Huizhong Zhu, Yi Yang, Chunhua Jiang, Wenfeng Nie, Zhenyu Luo, Zhangzhen Sun   +5 more
wiley   +1 more source

Research on Polar Motion Prediction Accuracy Based on ETH and GFZ Angular Momentum Forecast Products

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract Polar motion (PM), a critical element of Earth Orientation Parameters (EOP), is essential for high‐precision applications such as deep space exploration and satellite navigation. Recent advances in prediction methods utilizing Effective Angular Momentum (EAM) data have become a key pathway for enhancing PM forecast accuracy.
Xishun Li, Yuanwei Wu, Qiaoli Kong, Hai‐Hua Qiao, Tangrenjie Ye, Haiyan Yang, Zhizhuo Zhang, Xuan Cheng, Xuhai Yang, Xiaohui Li, Shougang Zhang   +10 more
wiley   +1 more source

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