Results 41 to 50 of about 1,728 (284)

GMM-Based Adaptive Extended Kalman Filter Design for Satellite Attitude Estimation under Thruster-Induced Disturbances

open access: yesSensors, 2023
Star images from star trackers are usually defocused to capture stars over an exposure time for better centroid measurements. While a satellite is maneuvering, the star point on the screen of the camera is affected by the satellite, which results in the ...
Taeho Kim   +3 more
doaj   +1 more source

An Integrated Tracker for STAR [PDF]

open access: yesAIP Conference Proceedings, 2006
The STAR experiment at the Relativistic Heavy Ion Collider RHIC studies the new state of matter produced in relativistic heavy ion collisions and the spin structure of the nucleon in collisions of polarized protons. In order to improve the capabilities for heavy flavor measurements and the reconstruction of charged vector bosons an upgrade of the ...
openaire   +2 more sources

Universal Verification Platform and Star Simulator for Fast Star Tracker Design

open access: yesSensors, 2021
Developing star trackers quickly is non-trivial. Achieving reproducible results and comparing different algorithms are also open problems. In this sense, this work proposes the use of synthetic star images (a simulated sky), allied with the standardized ...
Victor Hugo Schulz   +8 more
doaj   +1 more source

High-Fidelity Star Simulator for Cameras and Star Trackers [PDF]

open access: yes, 2023
LAUREA MAGISTRALEL'adozione di star tracker negli ultimi anni si sta estendendo anche ai CubeSat e SmallSat, grazie alle dimensioni compatte e alla loro capacità di determinare l’assetto con elevata precisione.
Gravina, Davide
core  

Astronomy: Star tracker [PDF]

open access: yesNature, 2013
As an early adopter of astronomical technology, Andrea Ghez is revealing secrets about the giant black hole at the Galaxy's centre.
openaire   +1 more source

A Heavy Flavor Tracker for STAR [PDF]

open access: yes, 2005
We propose to construct a Heavy Flavor Tracker (HFT) for theSTAR experiment at RHIC. The HFT will bring new physics capabilities toSTAR and it will significantly enhance the physics capabilities of theSTAR detector at central rapidities. The HFT will ensure that STAR willbe able to take heavy flavor data at all luminosities attainablethroughout the ...
Xu, Z.   +38 more
openaire   +6 more sources

Consideration on Actualizing the Non-Dimensional Star Pattern Recognition Algorithm for a Typical Laboratory Star Tracker [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2012
Star trackers are one of the most accurate attitude determination devices of a spacecraft. Star trackers are able to determine the spacecraft attitude with the use of recognizing the stars within their field of view.
Jafar Roshanian   +3 more
doaj  

ATTITUDE RESTITUTION FOR MULTISPECTRAL EARTH OBSERVATION SATELLITE USING SPACE TRIANGULATION TECHNIQUE [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Earth observation satellites are equipped with navigation components (star trackers, gyroscopes) which estimates the attitude of the satellite, corresponding to its orientation in the orbital reference frame.
N. Bernardini, R. Binet, B. Vidal
doaj   +1 more source

Centroid determination hardware algorithm for star trackers [PDF]

open access: yes, 2020
The execution of centroid extraction algorithms using a microprocessor consumes considerable resources when compared to the other steps involved in star trackers.
100001782   +7 more
core  

Selection of Design Parameters in Optical System of Star Tracker for a Satellite [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1999
In order to develop star trackers for a satellite in our country we studied selection procedure of optical parameters. For logical selection of the optical parameters, we simulated the entire processes in which star lights imaged on a CCD sensor were ...
Ja-Kyung Nah, Yong Ha Kim, Yu Yi
doaj  

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