Solar Ground-Based Data from the Base de donnees Solaire Sol (BASS) 2000 Project

BASS 2000 has been initiated by the Institut National des Sciences de l'Univers together with the Midi-Pyrenees Observatory, the research group "solar and stellar magnetodynamic", the CNRS laboratory 5572, the Midi-Pyrenees Region, the Bagneres de Bigorre City, and the CNES (Centre National des Etudes Spatiales) in Toulouse. It is currently funded by the national program "Sun-Earth relationship Program", the Midi-Pyrenees Observatory and the Astrophysic Laboratory of Toulouse. BASS 2000 is a national data base dedicated to ground based solar observations obtained with instruments such as THEMIS (Canaries), the spectrohelioph of the Meudon Observatory, the Radioheliograph in Nan?ay, Solar instruments at the Pic du Midi Observatory as well as simulation or magnetic field extrapolations concerning solar physics. This data base is complementary to the solar database MEDOC (SOHO and TRACE data) at the Institut d'Astrophysique Spatiale and to the interplanetary and plasma data base at the CNES (CDDP). The purpose is to archive and diffuse these solar ground based data as well as data reduction associated to these data. Main objectives are : - to build a new tool (to take advantage of solar data obtained using ground based instruments - to help converging toward a better standardization of solar data - to allow a long term safe-keeping of these data - to develop a pedagogic tool in solar physics. BASS 2000 is constituted of a long term archive in Tarbes (Midi-Pyrenees Observatory, France) and of a solar survey archive located in Meudon (Paris-Meudon Observatory). Data consists of raw spectral data and images from THEMIS, global radio flux and radioheliographs from Nancay, Hydrogen-alpha and Calcium-II spectroheliograph images from Meudon including synoptic maps and Hydrogen- alpha coronographs from Pic du Midi Observatory. For the latest solar imagery, see: http://bass2000.obspm.fr/home.php