Color/magnitude calibration for National Aeronautics and Space Administration (NASA) standard Fixed-Head Star Trackers (FHST)

Details Color/magnitude calibration for National Aeronautics and Space Administration (NASA) standard Fixed-Head Star Trackers (FHST) Color/magnitude calibration for National Aeronautics and Space Administration (NASA) standard Fixed-Head Star Trackers (FHST)

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994fmet.symp..467l&link_type=abstract

In its Flight Mechanics/Estimation Theory Symposium, 1994 p 467-480 (SEE N94-35605 11-13)

Physics

Calibrating, Extreme Ultraviolet Explorer Satellite, Star Trackers, Stellar Color, Stellar Magnitude, Upper Atmosphere Research Satellite (Uars), Field Of View, Luminous Intensity, Satellite Orientation, Star Distribution

Scientific paper

This paper characterizes and analyzes the spectral response of Ball Aerospace fixed-head star trackers, (FHST's) currently in use on some three-axis stabilized spacecraft. The FHST output is a function of the frequency and intensity of the incident light and the position of the star image in the field of view. The FHST's on board the Extreme Ultraviolet Explorer (EUVE) have had occasional problems identifying stars with a high B-V value. These problems are characterized by inaccurate intensity counts observed by the tracker. The inaccuracies are due to errors in the observed star magnitude values. These errors are unique to each individual FHST. For this reason, data were also collected and analyzed from the Upper Atmosphere Research Satellite (UARS). As a consequence of this work, the Goddard Space Flight Center (GSFC) Flight Dynamics Division (FDD) hopes to improve the attitude accuracy on these missions and to adopt better star selection procedures for catalogs.

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