Other solar archives

Several other collections of 35-mm rolls, corresponding to solar observations at radio and optical wavelengths, are archived by the Observatory of Paris in Meudon, under the responsability of LESIA.

In the frame of the decametric digitization project, we digitized a few test rolls for four different datasets, presented below, and available online.

* Solar radio observations in Nançay :
– Radio Multichannel Spectrograph of Nançay : 758 35-mm rolls between 1978 and 1991, over the spectral range 110-470 MHz (Dumas et al., 1982).
– Nançay RadioHeliograph (NRH) : solar interferometer operating since 1956, which acquires daily images within 150-450 MHz (Kerdraon et Delouis, 1997).

* Solar visible observations in Meudon and St-Michel de l’Observatoire :
– Meudon Heliograph : 1966 35-mm rolls acquired between 28 May 1956 and 29 Oct. 1997.
– Heliograph of the Haute Provence Observatory : 1195 35-mm rolls acquired between 30 Apr. 1958 and 1 Feb. 1995.

Références :

– The digital multi-channel radiospectrograph in Nançay, Dumas G., Caroubalos C. , Bougeret J.L., Solar Phys. 81,333-394, 1982.
– The Nançay Radio Heliograph, Kerdraon A., Delouis, J-M., 1997, in Coronal Physics from Radio and Space Observations; Proceedings of the CESRA workshop held in Nouan le Fuzelier, edited by Gerard Trottet. published by Springer, 1997, p.192. Page web (RHN)
– Solar Heliographs

**Solar image taken with the Heliograph of the Observatory of Meudon in 1957**

LESIA, Observatoire de Paris

**Solar image taken with the Heliograph of Observatoire de Haute Provence in 1958**

LESIA, Observatoire de Paris

**Solar dynamic spectrum acquired with the RSMN instrument on 29 Sept. 1989**

The covered spectral range lies within 110-450 MHz, the frequency decreases toward increasing y. Time is indicated at the bottom of the x axis. A major solar burst rises at the beginning of the observation.

LESIA, Station de radioastronomie de Nançay, Observatoire de Paris

**Solar dynamic spectrum from the Nançay Radioheliograph on 29 Sept. 1989**

Intensity at fixed frequency channels within 150-450 MHz, the frequency decreasing toward increasing y.

LESIA, Station de radioastronomie de Nançay, Observatoire de Paris

**35-mm rolls of other solar radio and visible observations**

LESIA, Station de radioastronomie de Nançay, Observatoire de Paris

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Solar image taken with the Heliograph of Observatoire de Haute Provence in (...)

Solar image taken with the Heliograph of the Observatory of Meudon in (...)