Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006exa....21..169p&link_type=abstract
Experimental Astronomy, Volume 21, Issue 3, pp.169-187
Astronomy and Astrophysics
Astronomy
Star Sensor, Ccd, Balloon-Borne, Attitude Control, Pointing Precision, X-Ray Telescopes
Scientific paper
This paper describes the design of a star sensor based upon a high dynamic range CCD in order to reach an arcsec-level attitude determination in balloon-borne missions. A custom star identification software was developed and laboratory-tested on a prototype assembled using commercial components. A set of numerical simulations have been carried out to study the dependence on the pointing precision of the centroid position accuracy, the number of detected stars and the effect of the image focusing. Moreover, the role of the electronic noise and the discrete pixel structure on the light signals is identified by the analysis of numerical simulations. Laboratory tests confirm that the arcsec pointing accuracy with a 1 Hz update rate can be achieved with our combination of custom-developed software and selected hardware components.
Barbini A.
Basili Alberto
Di Cocco Guido
Franceschini Turi
Galimberti M.
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