Results 41 to 50 of about 2,974 (210)

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

Aero-astrodynamics research review [PDF]

, 1968
Aero-astrodynamics research review, and report bibliography, July 1967 to August ...
Murphree, W. D.
core  

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

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, Sang-Young Park, Jong-Woo Kim, Kyu-Hong Choi   +3 more
doaj   +1 more source

Predicting and Clustering Attitude‐Induced Divergence in Cross‐Array AOA Measurements for LEO Satellites

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Example of cluster identification of attitude configurations to avoid in the attitude space (in terms of angles of roll, pitch and yaw) for a payload composed by a cross antenna array with angle of arrival technology for CubeSats platforms. ABSTRACT Satellite geolocation of radio‐frequency emitters increasingly relies on compact angle‐of‐arrival (AOA ...
Marcello Asciolla, Angela Cratere, Francesco Dell’Olio   +2 more
wiley   +1 more source

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, Sang-Young Park, Han-Earl Park, Chan-Deok Park, Seung-Woo Kim, Yoon-Soo Jang   +5 more
doaj   +1 more source

Potential of Ka‐Band Range Rate Post‐Fit Residuals for High‐Frequency Mass Change Applications

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract We present the first extensive analysis of K/Ka‐band ranging post‐fit residuals of an official Level‐2 product, characterized as Line‐of‐Sight Gravity Differences (LGD), which exhibit and showcase interesting sub‐monthly geophysical signals.
M. Cuadrat‐Grzybowski, J. G. Teixeira da Encarnacao, P. N. A. M. Visser   +2 more
wiley   +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, Eunseo Park, Hyungjik Jay Oh, Sang-Young Park, Hyung-Chul Lim, Chandeok Park   +5 more
doaj   +1 more source

Modulation of the Ocean Surface Skin Temperature and Heat Flux in the Presence of Strong SST Fronts

Journal of Geophysical Research: Oceans, Volume 130, Issue 12, December 2025.
Abstract Previous studies of air‐sea interactions over sharp oceanic fronts have suggested that it is the ocean that drives the atmosphere across sub‐mesoscale ocean fronts, but it is the atmosphere that drives the ocean at synoptic scales; the responsible mechanism, however, is still a matter of debate.
Sandra L. Castro, Gary A. Wick, Andrew T. Jessup   +2 more
wiley   +1 more source

Validation of GPS Based Precise Orbits Using SLR Observations [PDF]

Journal of Astronomy and Space Sciences, 2009
In this study, the YLPODS (Yonsei Laser-ranging Precision Orbit Determination System) is developed for POD using SLR (Satellite Laser Ranging) NP (Normal Point) observations. The performance of YLPODS is tested using SLR NP observations of TOPEX/POSEIDON
Young-Rok Kim, Eunseo Park, Sang-Young Park, Kyu-Hong Choi, Yoola Hwang, Hae-Yeon Kim, Byoung-Sun Lee, Jaehoon Kim   +7 more
doaj   +1 more source