Results 1 to 10 of about 169 (164)
Uncertainty Analysis of the Short-Arc Initial Orbit Determination [PDF]
IEEE Access, 2020 The solution of the short-arc angles-only orbit determination problem has large uncertainty because the topocentric range is not observable. For a certain angular observation tracklet with measurement noise, there exist numerous potential orbits, all of which are compatible with the observations.
Xuefeng Tao, Zhi Li, Yasheng Zhang
exaly +3 more sources
Probabilistic Optical and Radar Initial Orbit Determination
Journal of Guidance, Control, and Dynamics, 2018 Future space surveillance requires dealing with uncertainties directly in the initial orbit determination phase. We propose an approach based on Taylor differential algebra to both solve the initial orbit determination (IOD) problem and to map uncertainties from the observables space into the orbital elements space. This is achieved by approximating in
Roberto Armellin, Pierluigi Di Lizia
exaly +5 more sources
Generalization of a method by Mossotti for initial orbit determination [PDF]
Celestial Mechanics and Dynamical Astronomy, 2021 AbstractHere, we revisit an initial orbit determination method introduced by O. F. Mossotti employing four geocentric sky-plane observations and a linear equation to compute the angular momentum of the observed body. We then extend the method to topocentric observations, yielding a quadratic equation for the angular momentum. The performance of the two
Giovanni F. Gronchi +4 more
openaire +3 more sources
A More Reliable Orbit Initialization Method for LEO Precise Orbit Determination Using GNSS [PDF]
Remote Sensing, 2020 Precise orbit determination (POD) using GNSS has been rapidly developed and is the mainstream technology for the navigation of low Earth orbit (LEO) satellites. The initialization of orbit parameters is a key prerequisite for LEO POD processing. For a LEO satellite equipped with a GNSS receiver, sufficient discrete kinematic positions can be obtained ...
Xuewen Gong +3 more
openaire +2 more sources
Initial Orbit Determination from Only Heading Measurements
Journal of Spacecraft and Rockets, 2023 This work introduces the problem of initial orbit determination (IOD) from only heading measurements. Such a problem occurs in practice when estimating the orbit of a spacecraft using visual odometry measurements from an optical camera. After reviewing the problem geometry, a simple solution is developed in the form of an iterative scheme on the ...
openaire +2 more sources
Direct Initial Orbit Determination
IEEE Transactions on Aerospace and Electronic SystemsInitial 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 +3 more
openaire +2 more sources
Perturbed initial orbit determination
AstrodynamicsAn algorithm for robust initial orbit determination (IOD) under perturbed orbital dynamics is presented. By leveraging map inversion techniques defined in the algebra of Taylor polynomials, this tool returns a highly accurate solution to the IOD problem and estimates a range centered on the aforementioned solution in which the true orbit should lie. To
Alberto Fossà +2 more
openaire +2 more sources
Initial Orbit Determination for the CR3BP using Particle Swarm Optimization
CoRR, 2022 This work utilizes a particle swarm optimizer (PSO) for initial orbit determination for a chief and deputy scenario in the circular restricted three-body problem (CR3BP). The PSO is used to minimize the difference between actual and estimated observations and knowledge of the chief's position with known CR3BP dynamics to determine the deputy's initial ...
David Zuehlke +6 more
openaire +2 more sources
Numerical behaviour of the Keplerian Integrals methods for initial orbit determination
Icarus, 2022 We investigate the behaviour of two recent methods for the computation of preliminary orbits. These methods are based on the conservation laws of Kepler's problem, and enable the linkage of very short arcs of optical observations even when they are separated in time by a few years.
Óscar Rodríguez +3 more
openaire +3 more sources
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