Since 1970, the decametric radioastronomy research group of the Observatory of Paris initially led by André Boischot, based in Meudon (France), has acquired routine radio observations of the Sun and Jupiter in the decameter wavelength range with differents radiotelescopes from the radio observatory of Nançay (Forêt de Sologne, France) :
– Between 1970 and 1977 : with the Nançay Decameter Interferometer ;
– During summer 1970 : with the large Arecibo parabola (Porto Rico, USA) ;
– Since 1978 : with the Nançay Decameter Array.
Since 1990, the observations are directly acquired in digital format. Before this data, they were acquired on analog devices : 35-mm films, fac-similes, sefram, and magnetic tapes, most of which are archived at the Observatory of Paris.
This webpage describes the refursbishment project of the collection of decametric observations of Nançay stored on 35-mm films, which corresponds to about 1500 rolls, 30.5 m-long, hence a total length of about 45km of film.
In the frame of this project, we also digitized a few test rolls of other 35-mm datasets (solar observations at radio and optical wavelengths in Nançay, Meudon and St Michel de l’Observatoire) also archived at the Observatory of Paris.
- 35-mm films and reading device
Last update on 9 July 2020