Results 1 to 10 of about 145 (102)

A Novel Hybrid Approach for UT1-UTC Ultra-Short-Term Prediction Utilizing LOD Series and Sum Series of LOD and First-Order-Difference UT1-UTC [PDF]

Sensors
Accurate ultra-short-term prediction of UT1-UTC is crucial for real-time applications in high-precision reference frame conversions. Presently, traditional LS + AR and LS + MAR hybrid methods are commonly employed for UT1-UTC prediction.
Minsi Ao, Ningbo Li, Rong Zeng
exaly   +6 more sources

Inter-Comparison of UT1-UTC from 24-Hour, Intensives, and VGOS Sessions during CONT17 [PDF]

Sensors, 2022
This work focuses on the assessment of UT1-UTC estimates from various types of sessions during the CONT17 campaign. We chose the CONT17 campaign as it provides 15 days of continuous, high-quality VLBI data from two legacy networks (S/X band), i.e ...
Shrishail Raut, Robert Heinkelmann, Sadegh Modiri   +2 more
exaly   +9 more sources

Observing UT1-UTC with VGOS [PDF]

Earth, Planets and Space, 2021
We present first results for the determination of UT1-UTC using the VLBI Global Observing System (VGOS). During December 2019 through February 2020, a series of 1 h long observing sessions were performed using the VGOS stations at Ishioka in Japan and ...
Rüdiger Haas, E Varenius, Matthias Schartner   +2 more
exaly   +6 more sources

Research on UT1-UTC and LOD Prediction Algorithm Based on Denoised EAM Dataset

Remote Sensing, 2023
The components of EAM are strongly correlated with LOD and play an important role in UT1-UTC and LOD prediction. However, the EAM dataset is prone to be noisy.
Xishun Li, Yuanwei Wu
exaly   +4 more sources

Improved Ultra-Rapid UT1-UTC Determination and Its Preliminary Impact on GNSS Satellite Ultra-Rapid Orbit Determination [PDF]

Remote Sensing, 2020
Errors in ultra-rapid UT1-UTC primarily affect the overall rotation of spatial datum expressed by GNSS (Global Navigation Satellite System) satellite ultra-rapid orbit. In terms of existing errors of traditional strategy, e.g., piecewise linear functions,
Fei Ye, Yunbin Yuan, Zhiguo Deng
exaly   +6 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.
Yunbin Yuan
exaly   +4 more sources

Middle- and Long-Term UT1-UTC Prediction Based on Constrained Polynomial Curve Fitting, Weighted Least Squares and Autoregressive Combination Model

Remote Sensing, 2022
Universal time (UT1-UTC) is a key component of Earth orientation parameters (EOP), which is important for the study of monitoring the changes in the Earth’s rotation rate, climatic variation, and the characteristics of the Earth.
Yuguo Yang, Tianhe Xu, Wenfeng Nie
exaly   +4 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   +2 more
exaly   +4 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.
Wenbin Shen, Jiayao Wang
exaly   +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.
Xishun Li, Yuanwei Wu
exaly   +4 more sources