Results 61 to 70 of about 4,346 (251)

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

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

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

Comparative Accuracies of Models for Drag Prediction During Geomagnetically Disturbed Periods: A First Principles Model Versus Empirical Models

Space Weather, 2023
We examine the accuracy of density prediction by the first principles model Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) developed by the National Center for Atmospheric Research and compare it to the accuracy of three ...
R. L. Walterscheid, M. W. Chen, C.‐C. Chao, S. Gegenheimer, J. Cabrera‐Guzman, J. McVey   +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

Some applications of Lie groups in astrodynamics [PDF]

, 1983
Differential equations that arise in astrodynamics are examined from the standpoint of Lie group theory. A summary of the Lie method is given for first degree differential equations.
Jackson, A. A.
core  

Preliminary Products of Precise Orbit Determination Using Satellite Laser Ranging Observations for ILRS AAC [PDF]

Journal of Astronomy and Space Sciences, 2012
In this study, we present preliminary results of precise orbit determination (POD) using satellite laser ranging (SLR) observations for International Laser Ranging Service (ILRS) Associate Analysis Center (AAC).
Young-Rok Kim, Sang-Young Park, Eun-Seo Park, Hyung-Chul Lim   +3 more
doaj   +1 more source

A Comprehensive Review of ns‐3‐Based Simulation Frameworks for LEO Satellite Constellations: Capabilities and Limitations

Software: Practice and Experience, Volume 55, Issue 10, Page 1657-1675, October 2025.
ABSTRACT Background Low Earth Orbit (LEO) satellite constellations are redefining the concept of global connectivity, opening up a new world of opportunities for communication services and applications. Purpose The emergence of LEO satellites (SATs) is ushering in a new era of innovation, where new complex technologies are being developed, and the use ...
Pilar Manzanares‐Lopez, Juan Pedro Muñoz‐Gea, Josemaria Malgosa‐Sanahuja   +2 more
wiley   +1 more source

Uncertainty Propagation and Filtering via the Koopman Operator in Astrodynamics [PDF]

The Koopman Operator (KO) provides an analytical solution of dynamical systems in terms of orthogonal polynomials. This work exploits this representation to include the propagation of uncertainties, where the polynomials are modified to work with ...
Parker, William, Linares, Richard, Servadio, Simone   +2 more
core   +1 more source

Astrodynamics and Mechanical Design Principles for Next-Generation Space Exploration Systems

International journal of computer information systems and industrial management applications
The increasing complexity of deep-space missions encapsulates the essentiality of a transition from conventional component-centric spacecraft development toward integrated, adaptive system architectures.
J. Jain
semanticscholar   +1 more source