Results 41 to 50 of about 61,418 (298)

Excitation of Polar Motion [PDF]

open access: yesInternational Astronomical Union Colloquium, 2000
AbstractConceptual models of polar motion have evolved over the past century, as improved data revealed signals over progressively wider frequency bands. In the 1890s, Chandler represented polar motion as a sum of discrete components, 14 month and annual terms, and this component model effectively summarized the observations, but did not provide a ...
openaire   +1 more source

Excitation of non-atmospheric polar motion by the migration of the Pacific Warm Pool

open access: yes, 2004
Changes in the annual variation of the Earth's polar motion are found to be largely caused by the variation of the atmospheric angular momentum (AAM). Recent simulation results of oceanic general circulation models further suggest global oceanic effects ...
Liao, XH   +8 more
core   +1 more source

Excitation of Mars polar motion [PDF]

open access: yes, 2006
In this paper, computations of Mars' polar motion are presented for Mars models with three homogeneous layers as a function of the radius of the inner core and for different excitation possibilities (atmosphere, ice caps, quakes).
O. de Viron   +7 more
core   +1 more source

Integrating Motion Compensation With Polar Format Interpolation for Enhanced Highly Squinted Airborne SAR Imagery

open access: yesIEEE Access, 2019
Spatial-variant motion compensation (MOCO) is critical for high resolution and highly squinted airborne synthetic aperture radar (SAR) imaging. Conventional imaging strategies generally perform systematic imaging algorithm and motion compensation ...
Fengfei Wang   +3 more
doaj   +1 more source

Geodetic residual time series: A combined series by minimization of their internal noise level

open access: yesFrontiers in Earth Science, 2023
This study aims to assess the hydrological effects of polar motion calculated from different combinations of geophysical excitations at decadal, seasonal, and non-seasonal periods.
Małgorzata Wińska
doaj   +1 more source

Theoretical geodesy

open access: yesGeodesy and Cartography, 2015
The paper presents a summary of research activities concerning theoretical geodesy performed in Poland in the period of 2011-2014. It contains the results of research on new methods of the parameter estimation, a study on robustness properties of the M ...
Borkowski Andrzej, Kosek Wiesław
doaj   +1 more source

EOS Microwave Limb Sounder Observations of the Antarctic Polar Vortex Breakup in 2004 [PDF]

open access: yes, 2005
Observations from the Microwave Limb Sounder (MLS) on NASA's new Aura satellite give an unprecedentedly detailed picture of the spring Antarctic polar vortex breakup throughout the stratosphere.
Waters, J. W.   +7 more
core   +1 more source

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

open access: yesGeo-spatial Information Science
Accurate and real-time Earth rotation parameters (ERPs) are crucial for various scientific fields, including astronomy, geoscience, and oceanography.
Chenxiang Wang   +3 more
doaj   +1 more source

Oceanic excitations on polar motion: a cross comparison among models

open access: yes, 2005
Recent studies based on various ocean general circulation models (OGCMs) demonstrate that the oceans are a major contributor to polar motion excitations. In this paper, we analyse and compare observed non-atmospheric polar motion excitations with oceanic
Liao, XH, Wilson, CR, Zhou, YH, Chen, JL
core   +1 more source

An isoform of 14‐3‐3 protein regulates transbilayer lipid movement at the plasma membrane

open access: yesFEBS Letters, EarlyView.
Loss of 14‐3‐3ζ in CHO cells confers resistance to exogenous phosphatidylserine (PS) and impairs endocytosis‐independent inward flip‐flop of fluorescent PS at the plasma membrane. RNAi‐mediated knockdown reproduces this defect, while no additive effect is seen in ATP11C‐deficient cells.
Akiko Yamaji‐Hasegawa   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy