Properties of individual contrails: a compilation of observations and some comparisons

- Ulrich Schumann1 , Robert Baumann1 , Darrel Baumgardner2 , Sarah T. Bedka3 , David P. Duda3 , Volker Freudenthaler4 , Jean-Francois Gayet5 , Andrew J. Heymsfield6 , Patrick Minnis7 , Markus Quante8 , Ehrhard Raschke9 , Hans Schlager1 , Margarita Vázquez-Navarro1 , Christiane Voigt1,10, and Zhien Wang11