The twenty five year old Visual series of Francis Laclare observations of the Solar radius at the Côte d'Azur Observatory is revisited here, with the principle of data acquisition and treatment. It is the opportunity of recalling some basics in astrometry. The new series DORAYSOL of digital acquisition of the same radius is introduced as well...
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2003 (v1)Book sectionUploaded on: December 3, 2022
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2006 (v1)Journal article
For the last 25 years, ground time series of the solar radius have shown (different) apparent variations according to different instruments. The origin of these variations may search in the observer, the instrument, the atmosphere and up to the sun. Ground instruments are automated to reduce the "personnal equation" and place that origin in the...
Uploaded on: December 3, 2022 -
April 2001 (v1)Journal article
International audience
Uploaded on: December 4, 2022