Die u:cris Detailansicht:

Basic optics, aerosol optics, and the role of scattering for sky radiance

Autor(en)
Helmuth Horvath
Abstrakt

The radiance of the night sky is determined by the available light and the scattering properties of the atmosphere (particles and gases). The scattering phase function of the aerosol has a strong dependence on the scattering angle, and depending on the viewing direction different parts of the atmosphere and the ground reflectivity give the most important contribution. The atmospheric radiance cannot be altered by optical instruments. On the other hand the light flux of a distant star increases with the size of the telescope, thus fainter stars become visible. Light extinction, scattering function, atmospheric radiance, ground reflectivity, color effects and others are discussed in detail and a simple theoretical treatment is given.

Organisation(en)
Aerosolphysik und Umweltphysik
Journal
Journal of Quantitative Spectroscopy & Radiative Transfer
Band
139
Seiten
3-12
Anzahl der Seiten
10
ISSN
0022-4073
DOI
https://doi.org/10.1016/J.JQSRT.2013.08.009
Publikationsdatum
08-2013
Peer-reviewed
Ja
ÖFOS 2012
103021 Optik, 105904 Umweltforschung
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/5379eb21-d8b2-4e17-87a0-783f973a4585