Results 31 to 40 of about 143,267 (285)
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 ...
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Shadowing Lemma and Chaotic Orbit Determination
, 2015 Orbit determination is possible for a chaotic orbit of a dynamical system, given a finite set of observations, provided the initial conditions are at the central time.
Milani, Andrea, Spoto, Federica
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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 ...
Gong, Xuewen +3 more
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Remote Sensing, 2019 In order to provide better service for the Asia-Pacific region, the BeiDou navigation satellite system (BDS) is designed as a constellation containing medium earth orbit (MEO), geostationary earth orbit (GEO), and inclined geosynchronous orbit (IGSO ...
Zhiwei Qin +7 more
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Results of the attitude reconstruction for the UniSat-6 microsatellite using in-orbit data [PDF]
, 2016 UniSat-6 is a civilian microsatellite that was launched in orbit on the 19th of June, 2014. Its main mission consisted in the in-orbit release of a number of on-board carried Cubesats and in the transmission to the UniSat-6 ground station of telemetry ...
Chantal Cappelletti +11 more
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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
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Remote SensingSpace-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
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Stability Limits of Circumbinary Planets: Is There a Pile-up in the Kepler CBPs?
, 2018 The stability limit for circumbinary planets (CBPs) is not well defined and can depend on initial parameters defining either the planetary orbit or the inner binary orbit. We expand on the work of Holman & Wiegert (1999, AJ 117, 621) to develop numerical
Haghighipour, Nader +4 more
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Experiments in orbit determination using numerical methods [PDF]
, 1985 The dynamics of the observed object is written as a system of integral equations. This system is solved numerically by representing the components of the force function as linear combinations of B-splines and by applying the multigrid technique.
Traas, C.R.
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AerospaceIn 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 +5 more
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