Results 91 to 100 of about 512,146 (261)

Orbit determination of space objects based on sparse optical data [PDF]

open access: yes, 2010
While building up a catalog of Earth orbiting objects, if the available optical observations are sparse, not deliberate follow ups of specific objects, no orbit determination is possible without previous correlation of observations obtained at different ...
A. Milani   +24 more
core   +2 more sources

Ionospheric refraction effects on TOPEX orbit determination accuracy using the Tracking and Data Relay Satellite System (TDRSS) [PDF]

open access: yes
This investigation concerns the effects on Ocean Topography Experiment (TOPEX) spacecraft operational orbit determination of ionospheric refraction error affecting tracking measurements from the Tracking and Data Relay Satellite System (TDRSS).
Doll, C. E., Radomski, M. S.
core   +1 more source

Constraining Schwarzschild Models with Orbit Classifications [PDF]

open access: yesarXiv
A simple orbit classification constraint extension to stellar dynamical modeling using Schwarzschild's method is demonstrated. The classification scheme used is the existing `orbit circularity' scheme (lambda_z) where orbits are split into four groups - hot, warm, cold and counter rotating orbits. Other schemes which can be related to the orbit weights
arxiv  

The Connection between the Quantum Frequency of Radiation and Frequencies of Circling of the Electron in Atom of Hydrogen [PDF]

open access: yesarXiv, 2002
The connection between the quantum frequency of radiation by the transition of the electron from orbit n to orbit k and frequencies of circling of electron in these orbits for the atom of hydrogen is determined.
arxiv  

Automation of orbit determination functions for National Aeronautics and Space Administration (NASA)-supported satellite missions [PDF]

open access: yes
The Flight Dynamics Facility (FDF) at Goddard Space Flight Center (GSFC) provides spacecraft trajectory determination for a wide variety of National Aeronautics and Space Administration (NASA)-supported satellite missions, using the Tracking Data Relay ...
Beri, A.   +4 more
core   +1 more source

Orbital velocity [PDF]

open access: yesarXiv, 2016
The trajectory and the orbital velocity are determined for an object moving in a gravitational system, in terms of fundamental and independent variables. In particular, considering a path on equipotential line, the elliptical orbit is naturally traced, verifying evidently the keplerian laws. The case of the planets of the solar system is presented.
arxiv  

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

Evaluation of the IMP-16 microprocessor orbit determination system filter [PDF]

open access: yes
The results of the numerical tests performed in evaluating the interplanetary monitoring platform-16 orbit determination system are presented. The system is capable of performing orbit determination from satellite to satellite tracking data in ...
Shenitz, C. M., Tasaki, K. K.
core   +1 more source

Non-linear orbit determination methods [PDF]

open access: yes
Nonlinear correction method for orbit determination using range, azimuth, and elevation ...
Nayfeh, A. H.
core   +2 more sources

Home - About - Disclaimer - Privacy