Results 41 to 50 of about 795 (205)

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

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

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

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

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

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

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

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

Magnetospheric Cold Plasma Diagnostics Using High Altitude GNSS Signals

Journal of Geophysical Research: Space Physics, Volume 130, Issue 3, March 2025.
Abstract The plasmasphere is a key component of Earth's magnetosphere, regulating numerous energy transfer processes. The plasmasphere is also a cold multi‐species plasma. Tracing differences in dynamics between low and high mass cold ions is important for identifying the processes that drive plasmaspheric evolution.
D. M. Malaspina, P. Axelrad, J. Goldstein, R. Nikoukar, D. Rowland, S. Fantinato, E. Miotti   +6 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