@inproceedings{STILLER98_SPIE,
   author = "G. P. Stiller and M. H{\"o}pfner and M. Kuntz and T. von Clarmann 
             and G. Echle and H. Fischer and B. Funke and N. Glatthor and 
             F. Hase and H. Kemnitzer and S. Zorn",
   title  = "The {K}arlsruhe optimized and precise radiative transfer 
             algorithm. {P}art {I}: {R}equirements, justification, and model 
             error estimation",
   booktitle = "Optical Remote Sensing of the Atmosphere and Clouds, Beijing, 
                China, 15--17 September 1998",
   editor = "J. Wang and B. Wu and T. Ogawa and Z. Guan",
   journal= "Proc. SPIE",
   volume = "3501",
   pages  = "257-268",
   year   = "1998"   }