Results 51 to 60 of about 4,346 (251)
Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.Abstract A widely accepted global model of glacial isostatic adjustment (GIA) is based on ICE‐6G ice loading and 1D‐viscosity model VM5a, a viscosity profile which remains at odds with mantle convection constraints such as from geoid modeling. We explore 3D‐viscosity variations in models of GIA and show that a model with lateral viscosity variations ...
A. Bellas‐Manley +3 more
wiley +1 more source
Aero-astrodynamics research review [PDF]
, 1968 Aero-astrodynamics research review, and report bibliography, July 1967 to August ...
Murphree, W. D.
core
A Learning Approach To Sampling Optimization: Applications in Astrodynamics [PDF]
, 2013 A new, novel numerical optimization algorithm is developed, tested, and used to solve difficult numerical problems from the field of astrodynamics. First, a brief review of optimization theory is presented and common numerical optimization techniques ...
Henderson, Troy Allen
core +3 more sources
Adaptive Saturated Neural Network Tracking Control of Spacecraft: Theory and Experimentation
International Journal of Aerospace Engineering, 2019 An adaptive saturated neural network (NN) controller is developed for 6 degree-of-freedom (6DOF) spacecraft tracking, and its hardware-in-the-loop experimental validation is tested on the ground-based test facility. To overcome the dynamics uncertainties
Kewei Xia, Taeyang Lee, Sang-Young Park
doaj +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential influence on surface environments and early complex life.
J. W. L. Afonso +12 more
wiley +1 more source
Development of a Hardware-In-Loop (HIL) Simulator for Spacecraft Attitude Control Using Momentum Wheels [PDF]
Journal of Astronomy and Space Sciences, 2008 In this paper, a Hardware-In-the-Loop simulator to simulate attitude control of spacecraft using momentum wheels is developed. The simulator consists of a spherical air bearing system allowing rotation and tilt in all three axes, three momentum wheels ...
Dohee Kim +3 more
doaj +1 more source
Generating Stable and Metastable Critical Points in Uncertain Systems via Flow‐Based Models
Expert Systems, Volume 43, Issue 3, March 2026.ABSTRACT This work proposes the use of conditional flow‐based generative models to learn an approximation of the distribution of the critical points of a cost function. This approximation is used to incrementally identify all critical points, in the feasible domain of said function, by iteratively alternating the sampling of the distribution and the ...
Callum Wilson, Massimiliano Vasile
wiley +1 more source
Astrodynamics-optimization theory and guidance theory Research achievements review series no. 15-16 [PDF]
, 1965 Review of research achievements in astrodynamics, optimization theory, and guidance ...
core
Real-Time Determination of Relative Position Between Satellites Using Laser Ranging [PDF]
Journal of Astronomy and Space Sciences, 2012 We made a study on real-time determination method for relative position using the laser-measured distance data between satellites. We numerically performed the determination of relative position in accordance with extended Kalman filter algorithm using ...
Shinwon Jung +5 more
doaj +1 more source
Precise Orbital and Geodetic Parameter Estimation using SLR Observations for ILRS AAC [PDF]
Journal of Astronomy and Space Sciences, 2013 In this study, we present results of precise orbital geodetic parameter estimation using satellite laser ranging (SLR) observations for the International Laser Ranging Service (ILRS) associate analysis center (AAC).
Young-Rok Kim +5 more
doaj +1 more source