Results 81 to 90 of about 11,650 (287)

The evolution of lunar communication—From the beginning to the present

International Journal of Satellite Communications and Networking, Volume 42, Issue 3, Page 200-216, May/June 2024.
Since the beginning of the space age, the Moon has been the target of many missions from the 1950s to the present day. Radio communication plays a fundamental role in space vehicle projects because this is the most obvious way to communicate with the ground station and transmit control commands and scientific data.
Andrea Farkasvölgyi, László Csurgai‐Horváth, Petr Boháček   +2 more
wiley   +1 more source

GPS-Based Relative Navigation for Laser Crosslink Alignment in the VISION CubeSat Mission

Aerospace
As the demand for high-speed space-borne data transmission grows, CubeSat-based Free-Space Optical Communication (FSOC) offers a viable solution for achieving a Gbps-speed optical intersatellite link on low-cost platforms.
Yeji Kim, Pureum Kim, Han-Gyeol Ryu, Youngho Eun, Sang-Young Park   +4 more
doaj   +1 more source

The zonal satellite problem - I: Near-collision flow [PDF]

Serbian Astronomical Journal, 1998
The force field described by a potential function of the form U = Σn k=1 ak/rk (r = distance between particles, ak = real parameters) models various concrete situations belonging to astronomy, physics, mechanics, astrodynamics, etc. The two-body
Mioc V., Stavinschi M.
doaj   +1 more source

A Design Method for Redundant Microthruster Layout With Allocation Error

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
The microthruster is generally chosen as the actuator of the drag‐free satellite control system, and the layout directly affects the stability of the satellite control. Due to the extremely rigorous objectives of drag‐free control, a design method for the redundant thruster layout is proposed in this paper to improve the control stability of the ...
Mingwei Chen, Chu Zhang, Jianwu He, Chao Yang, Li Duan, Qi Kang, Chuang Liu   +6 more
wiley   +1 more source

Improved orbit predictions using two-line elements

, 2010
The density of orbital space debris constitutes an increasing environmental challenge. There are three ways to alleviate the problem: debris mitigation, debris removal and collision avoidance.
Alfriend, Boers, Boyce, Coffey, Creon Levit, Danielson, Flohrer, Gilbreath, Hedin, Kessler, Legendre, Liou, Liou, Neal, Pearlman, Ries, Schumacher, Snow, Wang, William Marshall   +19 more
core   +1 more source

Extension of the critical inclination

, 2011
The critical inclination is of special interest in artificial satellite theory. The critical inclination can maintain minimal deviations of eccentricity and argument of pericentre from the initial values, and orbits at this inclination have been applied ...
Baoyin, Hexi, Liu, Xiaodong, Ma, Xingrui
core   +1 more source

Astrodynamics-optimization theory and guidance theory Research achievements review series no. 15-16 [PDF]

Review of research achievements in astrodynamics, optimization theory, and guidance ...

core   +1 more source

Editorial. [PDF]

J Astronaut Sci, 2021
Akella MR.
europepmc   +2 more sources

Optimal Gliding Trajectories for Descent on Mars

Applied Sciences
In this paper, optimal gliding trajectories are analyzed, formulating an optimal control problem to be solved computationally via nonlinear programming.
Jhonathan Murcia-Piñeros, Antônio F. B. A. Prado, Ignazio Dimino, Rodolpho V. de Moraes   +3 more
doaj   +1 more source

Orbital Transfers in a Binary Asteroid System Considering Flattening of the Bodies and Solar Radiation Pressure

Aerospace
This paper aims to investigate the effects of asteroid size and shape and solar radiation pressure in the trajectories of a spacecraft in transfers between the collinear equilibrium points of a binary non-spherical asteroid system.
L. B. T. Santos, V. Y. Razoumny, V. M. Gomes, A. F. B. A. Prado   +3 more
doaj   +1 more source