e-mail :syildiz@posta.hho.edu.tr tel : +90 212 663 2490 fax : +90 212 287 2456
Department of Space Science, Aeronautics and Space Technologies Institute (ASTIN)
Yesilyurt 34149 Istanbul, Turkey
e-mail :yediyildiz.selcen@metu.edu.tr tel : +90 212 359 7515 fax : +90 212 287 2456
Department of Mechanical Engineering, Middle East Technical University
Cankaya 06800 Ankara, Turkey