Results 241 to 250 of about 143,267 (285)

Absence of orbital current torque in Ta/ferromagnet bilayers. [PDF]

Nat Commun
Liu Q, Zhu L.
europepmc   +1 more source

The Electric Field Instrument (EFI) for the TRACERS Mission. [PDF]

Space Sci Rev
Bonnell JW, Ludlam M, Slagle A, Goodrich K, LaBelle JW.   +4 more
europepmc   +1 more source

Spin-Orbit Torque-Driven Perpendicular Magnetization Switching for Artificial Synapses in Co/Ho Multilayer Systems. [PDF]

Nanomaterials (Basel)
Li S, Wei Y, Chen Y, Qu K, Yu P, Jiang Y.   +5 more
europepmc   +1 more source

Fast angles-only initial relative orbit determination for onboard application

, 2019
Ardaens, J. -S., Gaias, G.
openaire   +2 more sources

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Initial orbit determination using multiple observations

Celestial Mechanics and Dynamical Astronomy, 2010
A novel approach for initial orbit determination based on multiple angles-only observations is presented. The proposed technique is iterative and uses Lagrangian coefficients, f and g. The proposed method does not show singularity for the coplanar cases.
Reza Raymond Karimi, Daniele Mortari
openaire   +3 more sources

Probabilistic Initial Orbit Determination Using Gaussian Mixture Models

Journal of Guidance, Control, and Dynamics, 2013
The most complete description of the state of a system at any time is given by knowledge of the probability density function, which describes the locus of possible states conditioned on any available measurement information. When employing optical data, the concept of the admissible region provides a physics-based region of the range/range-rate space ...
Kyle J. DeMars, Moriba K. Jah
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Correlation of Optical Observations of Earth-Orbiting Objects and Initial Orbit Determination

Journal of Guidance, Control, and Dynamics, 2012
For optical observations of Earth-orbiting objects, multiple observationsmust be combined to determine the orbit of the observed object.Whether two arbitrary tracks are of the same object, however, is generally unknown a priori, and solving this problem with traditional approaches requires iterative procedures that do not guarantee convergence.
K. Fujimoto, D. J. Scheeres
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Initial Orbit Determination Using Simplex Fusion

2020 IEEE Aerospace Conference, 2020
A new Initial Orbit Determination (IOD) method for angles-only observations is presented. This method is based on an adaptive Nelder-Mead simplex optimization technique for fusion of multiple observations from one or more acquisition satellites. The resulting solution characterizes the target orbit as a standard state vector.
Patrick M. Handley, Susan P. Hagerty
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Initial Orbit Determination Utilizing Solution Group Optimization

IEEE Transactions on Aerospace and Electronic Systems, 2020
This paper investigates the use of space-based tracking data to determine the initial orbit of low-earth orbit (LEO) target satellites. A series of tracking data without distance information of a LEO target satellite can be provided by a space-based imaging observer and a target detection process. First, Gauss’ method is applied to a series of a target
Jing Hu, Binzhe Li, Jun Li
openaire   +1 more source