Results 21 to 30 of about 14,054 (271)
Earth, Planets and Space, 2023 Earth rotation parameters (ERPs) are essential for transforming between the celestial and terrestrial reference frames, and for high-precision space navigation and positioning.
Chenxiang Wang, Pengfei Zhang
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Neural ODE Differential Learning and Its Application in Polar Motion Prediction
Journal of Geophysical Research: Solid Earth, 2022 AbstractThis paper introduces a new learning algorithm for accurate, physically driven time series prediction. The fundamental assumption behind the method is that the phenomena follow Ordinary Differential Equations. We investigate the general case where the time series follows an ODE of degree .
Mostafa Kiani Shahvandi +2 more
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Polar motion resonance in the prograde diurnal band
, 2021 International audienceUntil now, the polar motion resonance (PMR) complex frequency has been determined in the seasonal and retrograde diurnal band of the polar motion.
Bizouard, C. +3 more
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Multi-instrumentation observations of a transpolar arc in the northern hemisphere [PDF]
Annales Geophysicae, 2008 A transpolar arc was imaged by the FUV instrument on the IMAGE spacecraft during a 3-h interval on 5 February 2002. Observations indicate that a burst of reconnection in the geomagnetic tail, which was not associated with a substorm, was responsible ...
A. Goudarzi +3 more
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Frontiers in Earth Science, 2021 Spring extreme precipitation poses great challenges to agricultural production and economic development in southern China. From the perspective of prediction, the relationship between spring extreme precipitation frequency (SEPF) in southern China and ...
Mengqi Zhang +3 more
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Differential Learning: A method for polar motion time series prediction
, 2022 <p>Nowadays, many applications such as Global Navigation Satellite Systems (GNSS) or spacecraft tracking require a rapid determination, or even predictions, of the Earth Orientation Parameters (EOP). However, due to the measurement techniques utilized to estimate EOP, the latency can be considerably longer than required, which especially ...
Mostafa Kiani Shahvandi +2 more
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A note on the annual wobble excitation due to the seasonal atmospheric loading on continents
Terrestrial, Atmospheric and Oceanic Sciences, 2018 Northern Eurasian continent has been regarded to contribute as the major source area, of which seasonal atmospheric pressure loading and unloading cycle leads to the annual wobble of the Earth. In the early days when reliable data of global coverage were
Sung-Ho Na +4 more
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Remote Sensing, 2023 Over the past four decades, Arctic sea ice coverage has steadily declined. This loss of sea ice has amplified solar radiation and heat absorption from the ocean, exacerbating both polar ice loss and global warming.
Dengyan Zhong +4 more
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The motion of point vortices on closed surfaces
, 2015 We develop a mathematical framework for the dynamics of a set of point vortices on a class of differentiable surfaces conformal to the unit sphere. When the sum of the vortex circulations is non-zero, a compensating uniform vorticity field is required to
Dritschel, David Gerard, Boatto, S
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, 2023 This article presents the application of weighted least squares (WLS) extrapolation and vector autoregressive (VAR) modeling in polar motion prediction. A piecewise weighting function is developed for the least squares (LS) adjustment in consideration of
Zhao, Danning, Lei, Yu, Guo, Min
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