In this paper we focus on the modeling and evaluation of next generation satellite communications technologies to support future aeronautical communications. Recent studies has identified the delivery of real-time high resolution weather maps to the cockpit as an important future aeronautical application. Focusing on this application, we investigate the use of Lowand GeosynchronousEarth Orbit (...

This study presents results from magnetic field line conjunctions between the medium-Earth orbiting Demonstration and Science Experiments (DSX) satellite low-Earth (LEO) very low frequencies (VLF) Propagation Mapper (VPM) satellite. DSX transmitted at VLF toward VPM, which was equipped with a single-axis dipole electric antenna, when two spacecraft passed near same line. VPM did not observe sig...

The positioning service aided by low Earth orbit (LEO) mega-constellations has become a hot topic in recent years. To achieve precise positioning, accuracy of the LEO clocks is important for single-receiver users. bridge gap between applicable time clock products and need to be predicted over certain period depending on sampling interval products. This study discusses prediction errors periods ...

In this study, the mathematical model of attitude motion is obtained for low orbit sattelite (LEO) with its kinematic and dynamic equations. The LEO satellite using Kepler parameters. Sensor data are generated adding zero mean Gaussian noise to comes from response. These measurement fused INS/GPS integration structure. Extended Kalman filter algorithm used sensor fusion. Compare estimated exten...

Recently, many Low Earth Orbit (LEO) satellite networks are being implemented to provide seamless communication services for global users. Since the high mobility of LEO satellites, handover strategy has become one most important topics systems. However, limited on-board caching resource satellites make it difficult guarantee performance. In this paper, we propose a multiple attributes decision...

This paper investigates the downlink (DL) transmit design for massive multiple-input multiple-output (MIMO) low-earth-orbit (LEO) satellite communication systems, where only slow-varying statistical channel state information is exploited at transmitter. The model DL MIMO LEO system established, in which both and user terminals (UTs) are equipped with uniform planar arrays. Observing rank-one pr...