Results 251 to 260 of about 6,687 (290)

Simulation of precise orbit determination of lunar orbiters [PDF]

open access: yesChinese Astronomy and Astrophysics, 2005
Abstract Based on the ongoing Chinese lunar exploration mission, i.e. the “Chang'e 1” project, precise orbit determination of lunar orbiters is analyzed for the actual geographical distribution and observational accuracy of the Chinese united S-band (USB) observation and control network as well as the very long baseline interferometry (VLBI) tracking
Xiao-gong Hu, Cheng Huang, Yong Huang
openaire   +2 more sources

Precise orbit determination for the GOCE satellite using GPS

Advances in Space Research, 2007
Abstract Apart from the gradiometer as the core instrument, the first ESA Earth Explorer Core Mission GOCE (Gravity field and steady-state Ocean Circulation Explorer) will carry a 12-channel GPS receiver dedicated for precise orbit determination (POD) of the satellite.
Adrian Jaggi   +2 more
exaly   +5 more sources

Precise Orbit Determination for NavIC Satellites

2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2021
Precise Orbit Determination (POD) is an important process for navigation applications like Precise Point Positioning (PPP) and Real Time Kinematics (RTK). Earlier researchers have carried out extensive research for GNSS constellations placed in Medium Earth Orbits (MEO) having dynamic behaviour different from Geo-Synchronous Orbits (GSO) satellites. In
B.N. Ramakrishana   +5 more
openaire   +1 more source

Antenna for precise orbit determination

Acta Astronautica, 2009
Abstract The ESA SWARM mission will consist of three satellites that will measure the Earth magnetic field. The system calls for metre accuracy knowledge of the measurement locations. To achieve this a GPS receiver is used. At least four GPS signals are tracked to determine the code and carrier ranges, from which the position can be derived.
Johan Wettergren   +3 more
openaire   +1 more source

Precision orbit determination for Topex

Advances in Space Research, 1990
The ability of radar altimeters to measure the distance from a satellite to the ocean surface with a precision of the order of 2 cm imposes unique requirements for the orbit determination accuracy. The orbit accuracy requirements will be especially demanding for the joint NASA/CNES Ocean Topography Experiment (Topex/Poseidon).
B.D. Tapley   +3 more
openaire   +1 more source

Precise orbit determination for GRACE

Advances in Space Research, 2003
Abstract The twin, co-orbiting GRACE (Gravity Recovery and Climate Experiment) satellites were launched in March 2002. The primary objective of the GRACE mission is to determine the Earth's gravity field and its temporal variations with unprecedented accuracy. To satisfy this objective as well as other applications (e.g.
Kang, Z., Nagel, P., Pastor, R.
openaire   +3 more sources

Precise orbit determination of Beidou Satellites with precise positioning

Science China Earth Sciences, 2012
Chinese Beidou satellite navigation system constellation currently consists of eight Beidou satellites and can provide preliminary service of navigation and positioning in the Asia-Pacific Region. Based on the self-developed software Position And Navigation Data Analysis(PANDA) and Beidou Experimental Tracking Stations (BETS), which are built by Wuhan ...
Chuang Shi   +8 more
openaire   +1 more source

Experiment for Precise Orbit Determination on InnoCube

2023
Computing platforms, such as FPGAs and SoCs, are delivering high performance systems in a form factor suitable for small satellites. By offering system-on-modules, technology entry has been drastically lowered. A first step to achieve these higher processing capabilities in orbit is envisioned in the EPISODE payload of the 3U InnoCube satellite, set to
Gläsner, S., Grzesik, B., Stoll, E.
openaire   +1 more source

Precise Orbit Determination of the MESSENGER Spacecraft

Journal of Guidance, Control, and Dynamics
The NASA MESSENGER mission explored Mercury for more than four years to investigate the properties of the planet. To safely operate in the harsh conditions around Mercury, the spacecraft was in a highly eccentric orbit with a low periapsis altitude. The radiation environment had a strong impact on the spacecraft orbit evolution because of the proximity
Andolfo, Simone   +2 more
openaire   +2 more sources

Precise orbit determination for lunar satellite

Acta Astronautica, 2002
Lunar satellite in the polar orbit is the most popular concept in the recent and future lunar exploration missions for finding the water and other objectives. The motion and perturbed solution of lunar satellite are distinctly different from that of the earth satellite because the central body of the satellite, the Moon, is not the same as the Earth ...
Liu Lin, Liu Yingchun
openaire   +1 more source

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