Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977cosp.meetq....l&link_type=abstract
COSPAR, Plenary Meeting, 20th, Tel Aviv, Israel, June 7-18, 1977, Paper. 22 p. Translation.
Astronomy and Astrophysics
Astronomy
Astronomical Maps, D-2 Satellites, Pattern Recognition, Satellite Attitude Control, Satellite Observation, Ultraviolet Spectrophotometers, Astronomical Catalogs, Axes Of Rotation, Drift Rate, Orbital Position Estimation, Spin Stabilization, Time Series Analysis, Zodiacal Light
Scientific paper
The paper describes how the drift of the axis of rotation of the spin stabilized astronomical satellite AURA is measured by means of the ERC (field recognition experiment). The ERC is a scanning photometer that provides images in three spectral intervals of a region centered at the anti-solar point and having a diameter of 10 deg. Time series data, grouped by frames, are converted into a rough map of the sky. The detected sources are identified by correlation with a special catalog of stars to 8 mag. The spin-axis positions are found from the star positions for each identified source, and the position series is smoothed by filtering. Test results show that the attitude drift of the satellite can be measured for over 75% of the orbits with an accuracy of + or -10 deg of arc.
Cruvellier P.
Gonin J. C.
Llebaria Antoine
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