Results 21 to 30 of about 1,834,226 (297)

Characteristics of Perturbations in Recent Length of Day and Polar Motion [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2013
Various features of the existing perturbations in the Earth’s spin rotation are investigated for the recent and most reliable data by spectral analysis, filtering, and comparison with idealized model. First, theory of Earth’s spin rotational perturbation
Sung-Ho Na   +4 more
doaj   +1 more source

A New Parameterization of Polar Motion [PDF]

open access: yesInternational Astronomical Union Colloquium, 1980
AbstractThe rotational motion of the earth is decomposed into spin, polar motion and local motions. The rotation vector components are associated to phenomena such as precession, nutation, diurnal spin, polar motion and local motions. The above decomposition is accomplished without refering to an earth-fixed CIO pole or BIH zero meridian. The time-like
openaire   +1 more source

Precise prediction of polar motion using sliding multilayer perceptron method combining singular spectrum analysis and autoregressive moving average model

open access: yesEarth, Planets and Space, 2023
The precise prediction of polar motion parameters is needed for the astrogeodynamics, navigation and positioning of the deep space probe. However, the current prediction methods are limited to predicting polar motion for specific periods, either short ...
Kezhi Wu   +5 more
doaj   +1 more source

Estimation of Earth Rotation Parameters and Prediction of Polar Motion Using Hybrid CNN–LSTM Model

open access: yesRemote Sensing, 2023
The Earth rotation parameters (ERPs), including polar motion (PMX and PMY) and universal time (UT1-UTC), play a central role in functions such as monitoring the Earth’s rotation and high-precision navigation and positioning.
Kehao Yu   +5 more
doaj   +1 more source

Brownian Motion With Polar Drift [PDF]

open access: yesTransactions of the American Mathematical Society, 1985
Consider a strong Markov process X 0 {X^0}
openaire   +1 more source

Comments to a polar bear population model [PDF]

open access: yes, 1985
Larsen, T. & Ugland, K. I. (Polar Research 2 n.s., 117-118) note correctly that a Leslie matrix model treats cubs and females as independent units which is not the case for polar bears.
Øritsland, Nils Are
core   +1 more source

American Polar Society Symposium 2003 [PDF]

open access: yes, 2003
Women's Roles in Polar Regions: Past, Present, and Future. American Polar Society Symposium 2003. Byrd Polar Research Center, The Ohio State University, Columbus, Ohio, October 9-10, 2003.Byrd Polar Research Center, The Ohio State UniversityAmerican ...
Byrd Polar Research Center
core   +1 more source

Polar Research’s referees [PDF]

open access: yes, 2010
It is once again time to thank all the scientists— not only those whose names are printed on the following pages—who have kindly served as referees for Polar Research during the last couple of ...
Goldman, Helle V.
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

Home - About - Disclaimer - Privacy