Fiche du document
1982
Copyright PERSEE 2003-2023. Works reproduced on the PERSEE website are protected by the general rules of the Code of Intellectual Property. For strictly private, scientific or teaching purposes excluding all commercial use, reproduction and communication to the public of this document is permitted on condition that its origin and copyright are clearly mentionned.
Sujets proches
CrepusculeCiter ce document
Marcel Ackerman et al., « Twilight observations from a balloon gondola. Preliminary results », Bulletins de l'Académie Royale de Belgique, ID : 10.3406/barb.1982.57271
Métriques
Partage / Export
Résumé
Twilight data obtained photographically from a stratospheric balloon platform in the falls of 1980 and 1981 and in the spring of 1982 are presented for blue and red light. They indicate the presence of a dust light absorbing and scattering layer in the mesosphere at altitudes near 60 km with a low scattering albedo (0.1) at 0.44 (im. The optical efficiency of the layer increases more than 10 times when the wavelength of the interacting light changes from 0.65 (im to 0.44 (im. At the zenith and near sunset, the natural 0.44 um extinction optical thickness and the cm2column scattering rate due to this layer are respectively found to be 6.6 x 10-2 and 0.18 mega Rayleigh per À on May 3, 1982 above the south west of France. The observations are presented in the framework of other data derived from ground, aircraft, balloons and spacecraft observations.