Results 251 to 260 of about 3,202,356 (283)

Evaluation of Star Identification Techniques

Journal of Guidance, Control, and Dynamics, 1997
Traditionally, star sensors have used fairly large e elds of view and bright stars to perform tracking and identie cation. Recent trends in space missions have brought out the need for smaller e eld-of-view sensors, capable of performing multiple functions that will reduce spacecraft payload and cost.
Padgett, Curtis, Kreutz-Delgado, Kenneth, Udomkesmalee, Suraphol   +2 more
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A fast recognition algorithm for star identification of star trackers

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017
This paper focuses on recognizing the correct match of star identification among multiple possible candidates for star trackers. Derived from the perturbation theory, a tolerance criterion is proposed and proved to check the correctness of the candidates.
Xiaochu Wang, Changhao Sun, Ting Sun 0005, Hang Yin, Fei Xing   +4 more
openaire   +1 more source

Stochastic star identification

Journal of Guidance, Control, and Dynamics, 1994
Summary: An approach to star identification based on comparing observed pattern statistics with the precomputed star cataloged statistics is suggested. The identification criterion is based on evaluating a posteriori probabilities of designated star sequences obtained from observing different star fields. Numerical results based on a specific algorithm
Udomkesmalee, Suraphol, Alexander, James W., Tolivar, Aurelio F.   +2 more
openaire   +1 more source

Star-field identification algorithm

Optics Letters, 1993
A six-feature, all-sky star-field identification algorithm has been developed. The minimum identifiable star pattern element consists of an oriented star triplet defined by three stars, their celestial coordinates, and their visual magnitudes.
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IDENTIFICATION OF STARS BY LEARNERS

Empire Survey Review, 1960
AbstractIt is not customary in text-books on surveying to treat the identification of stars as a subject requiring detailed discussion; nevertheless with learner-surveyors and occasional practitioners it is a major problem.
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Nondimensional star identification for uncalibrated star cameras

The Journal of the Astronautical Sciences, 2006
Star identification is the most critical and important process for attitude estimation, given data from any star sensor. The main purpose of the Star Identification (Star-ID) process is to identify the observed/measured stars with the corresponding cataloged stars.
Malak A. Samaan, Daniele Mortari, John L. Junkins   +2 more
openaire   +1 more source

Iterative algorithm for autonomous star identification

IEEE Transactions on Aerospace and Electronic Systems, 2015
An autonomous star identification algorithm is described in this study. This algorithm iteratively determines a catalog star, the distances of which to its neighbors are similar to those of a given sensor star and its neighboring stars, until a unique match is found.
Jian Li 0037, Xinguo Wei, Guangjun Zhang
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An Analytical Approach to Star Identification Reliability

AIAA Guidance, Navigation and Control Conference and Exhibit, 2008
Abstract The problem of real-time, on-board star pattern identification is considered which must precede any spacecraft attitude estimation algorithm based on measured line of sight directions to stars. Following the use of the search-less k -vector method to access feasible candidate stars (detailed in a previous paper) a tiered logical ...
Mrinal Kumar, Daniele Mortari, John L. Junkins   +2 more
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An Novel Effective Simulation Method of Star Atlas for Star Identification

2012 Fifth International Joint Conference on Computational Sciences and Optimization, 2012
In order to further improve the attitude control accuracy of the spacecraft and analysis the star identification algorithm, an effective simulation method of star atlas is proposed. This approach utilizes the same field of view in different latitude to calculate the exact position of observed stars in the charge-coupled device (CCD) image plane.
Xiaowen Wu, Lin Zhao 0001, Yong Hao, Xin Yan   +3 more
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IDENTIFICATION OF STARS BY LEARNERS

Survey Review, 1961
AbstractIn the April 1960 issue of the Empire Survey Review (xv, 116, 277–281), Mr. Tait deals with the very real difficulty of identifying stars observed during the course of a position line programme, which is not a pre-computed programme. This difficulty is one that, moreover, is not confined only to learners.
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