Results 41 to 50 of about 143,162 (326)

Direct Initial Orbit Determination

IEEE Transactions on Aerospace and Electronic Systems
Initial orbit determination (IOD) is an important early step in the processing chain that makes sense of and reconciles the multiple optical observations of a resident space object. IOD methods generally operate on line-of-sight (LOS) vectors extracted from images of the object, hence the LOS vectors can be seen as discrete point samples of the raw ...
Chee-Kheng Chng, Trent Jansen-Sturgeon, Timothy Payne, Tat-Jun Chin   +3 more
openaire   +2 more sources

Non-Cooperative LEO Satellite Orbit Determination Using Single Station for Space-Based Opportunistic Positioning

Remote Sensing
Space-based opportunistic positioning is a crucial component of resilient positioning, navigation, and timing (PNT) systems, and it requires the acquisition of orbit information for non-cooperative low Earth orbit (LEO) satellites.
Ruofan Deng, Honglei Qin, Yu Zhang
doaj   +1 more source

Research on Sliding-Window Batch Processing Orbit Determination Algorithm for Satellite-to-Satellite Tracking

Aerospace
In response to the increasing demand for high-precision navigation of satellites operating in the cislunar space, this study introduces an onboard orbit determination algorithm considering both convergence and computational efficiency, referred to as the
Yingjie Xu, Xuan Feng, Shuanglin Li, Jinghui Pu, Shixu Chen, Wenbin Wang   +5 more
doaj   +1 more source

Initial relative-orbit determination using heterogeneous TDOA

2017 IEEE Aerospace Conference, 2017
This paper presents a solution for the initial orbit determination of a space-based RF transmitter using time-difference-of-arrival (TDOA) measurements obtained from space-based receivers in known orbits. Orbit determination requires six independent TDOA measurements spread over time.
Shuster, Simon, Sinclair, Andrew J., Lovell, T. Alan   +2 more
openaire   +2 more sources

Maximum a posteriori estimation through simulated annealing for binary asteroid orbit determination

, 2017
This paper considers a new method for the binary asteroid orbit determination problem. The method is based on the Bayesian approach with a global optimisation algorithm.
Emelyanov, Nikolay V., Kovalenko, Irina D., Stoica, Radu S.   +2 more
core   +2 more sources

Long-term variability of CO2 and O in the Mars upper atmosphere from MRO radio science data [PDF]

, 2015
We estimate the annual variability of CO2 and O partial density using approximately 6years of Mars Reconnaissance Orbiter (MRO) radio science data from August 2006 to January 2012, which cover three full Martian years (from the northern hemisphere summer
Fricke, Susan K., Genova, Antonio, Goossens, Sander, Lemoine, Frank G., Mazarico, Erwan, Smith, David E., Zuber, Maria T.   +6 more
core   +1 more source

Validation of GPS Based Precise Orbits Using SLR Observations [PDF]

Journal of Astronomy and Space Sciences, 2009
In this study, the YLPODS (Yonsei Laser-ranging Precision Orbit Determination System) is developed for POD using SLR (Satellite Laser Ranging) NP (Normal Point) observations. The performance of YLPODS is tested using SLR NP observations of TOPEX/POSEIDON
Young-Rok Kim, Eunseo Park, Sang-Young Park, Kyu-Hong Choi, Yoola Hwang, Hae-Yeon Kim, Byoung-Sun Lee, Jaehoon Kim   +7 more
doaj   +1 more source

Simulation of the Use of Variance Component Estimation in Relative Weighting of Inter-Satellite Links and GNSS Measurements

Remote Sensing, 2022
Inter-satellite links (ISLs) can improve the performance of the Global Navigation Satellite System (GNSS) in terms of precise orbit determination, communication, and data-exchange capabilities.
Tomasz Kur, Tomasz Liwosz
doaj   +1 more source

On initial orbit determination

The Astronomical Journal, 1984
The classical methods of initial orbit determination are brought together within a larger viewpoint. This new synthesis stresses that all such techniques follow one of three approaches. Either they seek to compute the orbital element set, or its equivalent, by attacking the differential equations of motion (Laplace), the first integrals of the ...
openaire   +1 more source

An independent determination of Fomalhaut b's orbit and the dynamical effects on the outer dust belt [PDF]

, 2013
The nearby star Fomalhaut harbours a cold, moderately eccentric dust belt with a sharp inner edge near 133 au. A low-mass, common proper motion companion (Fom b), was discovered near the inner edge and was identified as a planet candidate that could ...
Augereau, Jean-Charles, Beust, Hervé, Bonsor, Amy, Ertel, Steve, Faramaz, Virginie, Graham, J., Kalas, Paul, Lagrange, Anne-Marie, Lebreton, J., Thebault, Philippe   +9 more
core   +7 more sources