Mesures du rayon solaire avec l'instrument DORAYSOL (1999–2006) sur le site de Calern (observatoire de la Côte d'Azur)

Autor: Abdanour Irbah, Thierry Corbard, M. Fodil, Frédéric Morand, Ch. Delmas, Bertrand Chauvineau, Francis Laclare

Publikováno v: Comptes Rendus Physique. 11:660-673

The series of measurements of the Solar radius at CALERN site of the observatoire de la Cote d'Azur (OCA) spans about 30 years. Measurements of the Sun were first achieved visually by the same single observer, then gradually grew more man-independent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d4d286b392544cf01d75db9397a8919b
https://doi.org/10.1016/j.crhy.2010.10.003

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Autor: Toufik E. Abdelatif, Abdanour Irbah, Eric Fossat, Christian Delmas, Francis Laclare, Rachid Moussaoui, Julien Borgnino

Publikováno v: Solar Physics. 195:433-437

Solar diameter measurements performed at Calern Observatory astrolabe during more than two solar cycles show variations at various time scales in a broad range. Due to seasonal effects and instrumental characteristics, the recorded data are not sampl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7eafae98a7c8e1d1b32e91b57309f32e
https://doi.org/10.1023/a:1005294816363

Error due to atmospheric turbulence effects on solar diameter measurements performed with an astrolabe

Autor: Julien Borgnino, Lyes Lakhal, Christian Delmas, Maatouk Bouzaria, Francis Laclare, Abdanour Irbah

Publikováno v: Astronomy and Astrophysics Supplement Series
Astronomy and Astrophysics Supplement Series, EDP Sciences, 1999, 138, pp.155-162
ResearcherID

International audience; Diameter measurements performed with the solar astrolabe are affected by instrumental and atmospheric effects. The problem is to know how these effects contribute to the error on diameter measurements. Thus, a numerical simula

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb886e5fc43b3f69ccd0c17d5b759bd9
https://doi.org/10.1051/aas:1999269

PICARD: Simulataneous measurements of the solar diameter, differential rotation, solar constant and their variations

Autor: Francis Laclare, D. Crommelynck, Christian Delmas, Luc Damé, Gérard Thuillier, T. Appourchaux, Claus Fröhlich, Steven Dewitte, Alexandre Joukoff, M. Hersé, Patrick Boumier

Publikováno v: Advances in Space Research. 24:205-214

PICARD is a CNES micro-satellite mission due for flight by the end of 2002, named after the name of a French astronomer who first observed with consistency the solar diameter changes during the Maunder minimum in the 16th century. It consists of two

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ac64fd126df41a05b8659a6612ac4984
https://doi.org/10.1016/s0273-1177(99)00502-5

PICARD SOL, a new ground-based facility for long-term solar radius measurements: first results

Autor: Djelloul Djafer, M. Lin, Alain Hauchecorne, Thierry Corbard, Catherine Renaud, Mustapha Meftah, Frédéric Morand, M. Fodil, Abdanour Irbah, Mickael Crepel, Bertrand Chauvineau, P. Assus, Francis Laclare, Francis Dalaudier, R. Ikhlef, Patrick Lesueur, Germain Poiet

Publikováno v: Journal of Physics: Conference Series
Journal of Physics: Conference Series, 2013, 440, 012003 (6 p.). ⟨10.1088/1742-6596/440/1/012003⟩
Journal of Physics: Conference Series, IOP Publishing, 2013, 440, 012003 (6 p.). ⟨10.1088/1742-6596/440/1/012003⟩

International audience; PICARD SOL is the ground component of the PICARD mission and is operational since March 2011. A set of instruments including the replica of the space instrument and several atmospheric monitors was set up at Calern observatory

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::683531679f4ceadfdc6ade51ea8b94d2
https://hal.science/hal-00835418/document