Results 61 to 70 of about 201,777 (208)

Helioseismic determination of the solar gravitational quadrupole moment [PDF]

open access: yes, 1998
One of the most well-known tests of General Relativity (GR) results from combining measurements of the anomalous precession of the orbit of Mercury with a determination of the gravitational quadrupole moment of the Sun J_2.
Pijpers, F. P.
core   +3 more sources

Analysis of Orbit Accuracy for Non-cooperative Earth-Orbiting Objects

open access: yesOpen Astronomy, 2019
The atmospheric resistance and solar radiation pressure are the main sources of non-gravitational perturbations in orbit determination and prediction of non-cooperative earth-orbiting objects.
Jianrong Chen, Junfeng Li
doaj   +1 more source

Suboptimal filtering. Part 2 - Compensation for modeling errors in orbit determination problems Final report [PDF]

open access: yes
Compensation for dynamic and measurement model errors in real time orbit determination ...
Bailie, A. E.   +3 more
core   +1 more source

Comparison of ERBS orbit determination accuracy using batch least-squares and sequential methods [PDF]

open access: yes
The Flight Dynamics Div. (FDD) at NASA-Goddard commissioned a study to develop the Real Time Orbit Determination/Enhanced (RTOD/E) system as a prototype system for sequential orbit determination of spacecraft on a DOS based personal computer (PC).
Doll, C. E.   +5 more
core   +1 more source

Orbit Determination Error Analysis for the KOMPSAT [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1998
Orbit error analysis was performed for the GPS navigation solutions and ground station tracking data of the KOMPSAT (Korea Multi-Purpose SATellite), which will be launched in 1999 for cartography of Korean peninsula as main mission. A least square method
Jeong-Sook Lee, Byoung-Sun Lee
doaj  

Performance of the square root information filter for navigation of the Mariner 10 spacecraft [PDF]

open access: yes
The use is described of a sequential least squares filter in the orbit determination for the Mariner Venus-Mercury (Mariner 10) spacecraft. The orbit determination strategy outlining the use of both the sequential filter and a conventional batch filter ...
Christensen, C. S.
core   +1 more source

Improved Chebyshev series ephemeris generation capability of GTDS [PDF]

open access: yes, 1980
An improved implementation of the Chebyshev ephemeris generation capability in the operational version of the Goddard Trajectory Determination System (GTDS) is described.
Jacintho, J. J., Liu, S. Y., Rogers, J.
core   +1 more source

Spin-orbit coupling in interacting quasi-one-dimensional electron systems

open access: yes, 2000
We present a new model for the study of spin-orbit coupling in interacting quasi-one-dimensional systems and solve it exactly to find the spectral properties of such systems.
A. Altland   +25 more
core   +1 more source

Summary of Lunar Constellation Navigation and Orbit Determination Technology

open access: yesAerospace
The Moon is the closest celestial body to the Earth. Its rich unique resources are an important supplement to the Earth’s resources and have a profound impact on the sustainable development of human society.
Xiao Zhang   +4 more
doaj   +1 more source

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