Results 11 to 20 of about 20,578 (146)

Impact of Tropospheric Ties on UT1‐UTC in GNSS and VLBI Integrated Solution of Intensive Sessions [PDF]

Journal of Geophysical Research: Solid Earth, 2022
AbstractVery Long Baseline Interferometry (VLBI) intensive (INT) sessions are critical for the rapid determination and densification of Universal Time 1‐Coordinate Universal Time (UT1‐UTC), which plays an important role in satellite geodesy and space exploration missions and is not predictable over longer time scales.
Wang, Jungang, Ge, Maorong, Glaser, Susanne, Balidakis, Kyriakos, Heinkelmann, Robert, Schuh, Harald, Ge, Maorong; 1 Space Geodetic Techniques GeoForschungsZentrum (GFZ) Potsdam Germany, Glaser, Susanne; 1 Space Geodetic Techniques GeoForschungsZentrum (GFZ) Potsdam Germany, Balidakis, Kyriakos; 4 Earth System Modelling GeoForschungsZentrum (GFZ) Potsdam Germany, Heinkelmann, Robert; 1 Space Geodetic Techniques GeoForschungsZentrum (GFZ) Potsdam Germany, Schuh, Harald; 1 Space Geodetic Techniques GeoForschungsZentrum (GFZ) Potsdam Germany   +10 more
wiley   +5 more sources

Investigating a continental Australian VGOS VLBI intensive for UT1-UTC determination

Earth, Planets and Space
In this simulation study, we investigate the potential performance of VLBI Intensives using the AuScope 12-metre VLBI network. This continental Australian network consisting of three stations, has recently been fully upgraded with VGOS receivers and has ...
Tiege McCarthy, Lucia McCallum, Matthias Schartner   +2 more
doaj   +4 more sources

Improved LS+MAR hybrid method to UT1-UTC ultra-short-term prediction by using first-order-difference UT1-UTC

Geodesy and Geodynamics
Accurate ultra-short-term prediction of the Earth rotation parameters (ERP) holds paramount importance for real-time applications, particularly in reference frame conversion.
Fei Ye, Yunbin Yuan
doaj   +3 more sources

Evaluation of selected short-term predictions of UT1-UTC and LOD collected in the second earth orientation parameters prediction comparison campaign

Earth, Planets and Space, 2022
Advanced geodetic and astronomical tasks, such as precise positioning and navigation require forecasted Earth Orientation Parameters (EOP). The Second Earth Orientation Parameters Prediction Comparison Campaign (2nd EOP PCC) aims to compare various EOP ...
Tomasz Kur, Henryk Dobslaw, Justyna Śliwińska, Jolanta Nastula, Małgorzata Wińska, Aleksander Partyka   +5 more
doaj   +5 more sources

Evaluating the potential of Indian stations in augmenting the UT1−UTC precision of VGOS Intensive sessions

Earth, Planets and Space
Irregularities in the Earth’s rotation speed are quantified by the difference between Universal Time (UT1) and Coordinated Universal Time (UTC).
Arnab Laha, Matthias Schartner, Benedikt Soja, Sigrid Böhm, Hana Krásná, Nagarajan Balasubramanian, Onkar Dikshit   +6 more
doaj   +4 more sources

Improved LOD and UT1-UTC Prediction Using Least Squares Combined with Polynomial CURVE Fitting

Remote Sensing
The Length of Day (LOD) and the Universal Time (UT1) play crucial roles in satellite positioning, deep space exploration, and related fields. The primary method for predicting LOD and UT1 is least squares fitting combined with autoregressive (AR) models.
Chao Li, Xishun Li, Yuanwei Wu, Xuhai Yang, Haihua Qiao, Haiyan Yang   +5 more
doaj   +3 more sources

Prediction of polar motion and UT1-UTC based on the hybrid EEMD_LSTM model

Geo-spatial Information Science
Accurate and real-time Earth rotation parameters (ERPs) are crucial for various scientific fields, including astronomy, geoscience, and oceanography.
Chenxiang Wang, Pengfei Zhang, Wenbin Shen, Jiayao Wang   +3 more
doaj   +3 more sources

Short-term prediction of UT1-UTC and LOD via Dynamic Mode Decomposition and combination of least-squares and vector autoregressive model

Reports on Geodesy and Geoinformatics
This study presents a short-term forecast of UT1-UTC and LOD using two methods, i.e. Dynamic Mode Decomposition (DMD) and combination of Least-Squares and Vector Autoregression (LS+VAR).
Michalczak Maciej, Ligas Marcin
doaj   +3 more sources

Combining evolutionary computation with machine learning technique for improved short-term prediction of UT1-UTC and length-of-day

Earth, Planets and Space
Over the years, prediction techniques for the highly variable angular velocity of the Earth represented by Earth's rotation (UT1-UTC) and length-of-day (LOD) have been continuously improved.
Sujata Dhar, Robert Heinkelmann, Santiago Belda, Sadegh Modiri, Harald Schuh, Sonia Guessoum, José Manuel Ferrándiz, Nagarajan Balasubramanian, Onkar Dikshit   +8 more
doaj   +6 more sources

VGOS VLBI Intensives between MACGO12M and WETTZ13S for the rapid determination of UT1-UTC

, 2023
In this work, we present a status update and 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.
Lemoine, Frank G., Petrov, Leonid, Plötz, Christian, Schartner, Matthias, Soja, Benedikt, Terrazas, Eusebio   +5 more
core   +3 more sources