Results 51 to 60 of about 9,881 (218)

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

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

Evolutionary Approach to Lambert’s Problem for Non-Keplerian Spacecraft Trajectories

Aerospace, 2017
In this paper, we use differential evolution (DE), with best-evolved results refined using a Nelder–Mead optimization, to solve boundary-value complex problems in orbital mechanics relevant to low Earth orbits (LEO).
David W. Hinckley, Darren L. Hitt
doaj   +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

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

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

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

Novel numerical optimisation of the Hohmann Spiral Transfer [PDF]

, 2013
As the revenue of commercial spacecraft platforms is generated by its payload, of which the capacity is maximised when fuel-mass is minimised, there is great interest in ensuring the fuel required for the trajectory to deliver the satellite to its ...
Macdonald, Malcolm, Owens, Steven Robert
core  

The Effect of Water Vapor and Solar Zenith Angle on Oceanic Diurnal Warming

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract Oceanic diurnal warm layers have been extensively studied over the years due to their important role in a variety of geophysical disciplines. Much of this research has been dedicated to the development of predictive models of varying complexity to calculate the spatiotemporal magnitude of the effect. This manuscript presents results which show
Andrew Harris, Gary Wick, Sandra Castro
wiley   +1 more source

Non-averaged regularized formulations as an alternative to semi-analytical orbit propagation methods

, 2019
This paper is concerned with the comparison of semi-analytical and non-averaged propagation methods for Earth satellite orbits. We analyse the total integration error for semi-analytical methods and propose a novel decomposition into dynamical, model ...
Amato, Davide, Baù, Giulio, Bombardelli, Claudio, Morand, Vincent, Rosengren, Aaron J.   +4 more
core   +1 more source