Tuesday 22 September 2020, by Baptiste Cecconi
This collection contains raw digitised 35mm film decametric observations of Jupiter and the Sun performed daily in Nançay with the Nançay Decameter Array (NDA) from 1978 to 1991 and with the Nançay Decameter Inteferometer (NDI) from 1970 to 1977.
This collection contains raw decametric observations of Jupiter and the Sun performed daily in Nançay with the Nançay Decameter Array (NDA) from 1978 to 1991 and with the Nançay Decameter Inteferometer (NDI) from 1970 to 1977 (Boischot, 1974 ; Boischot et al., 1980). These observations were originally recorded on 35mm film rolls and facsimiles, presently archived at the Observatory of Paris in Meudon (Lamy et al., 2017, Cecconi et al., 2018). The 35mm collection is composed of about 1500 100ft-long film rolls (approaching a total length of 45 km). The films have been digitized at high resolution by OSIC, acting as a subcontractor of Observatoire de Paris. Each film roll thus yields several hundreds of individuals views, provided in TIF and JPG format below. This digitization project was made possible through funding support from: Collex Gis-Persée (french ministry of culture), Observatoire de Paris (ESTERS group, scientific council), The radioastronomy station of Nançay and CNES.
Content
The collection is composed of 1491 digitised 35mm film rolls. Each film roll is digitised in a series of several hundred sequential TIFF files. The total number of TIFF files in the collection is 462633. Each TIFF file is associated with a JPEG file (medium resolution image) and a PNG (low resolution image).
Description | Format | Dimension | Size |
Raw scan | TIFF | 15744 x 5408 | 63 MB |
Inspection image | JPEG | 3149 x 1082 | 700 kB |
Quick view scan | PNG | 787 x 270 | 63 MB |
The films have been recorded with several instruments:
The collection naming convention is:
FR751142302_<INSTRUMENT>_<ROLL_ID>_<YEAR>
The file naming convention is:
FR751142302_<INSTRUMENT>_<ROLL_ID>_<YEAR>_<IMAGE_ID>.<ext>
Coverage and sampling
Acknowledgements
This project was made possible thanks to the support of the following partners:
Owing to the significant work invested by the NDA team in this project, any foreseeable use of these digitized data should be announced to contact.nda@obs-nancay.fr and accompanied by a citation of the collection :
Contact
Any question or request should be addressed to contact.maser@obspm.fr