Stiffness estimation for large–sized umbrella space reflector Alexey Belkov, Sergey Belov, Mikhail Pavlov, Victor Ponomarev, Sergey Ponomarev and Andrey Zhukov MATEC Web of Conferences, 48 (2016) 02001 Published online: 04 April 2016 DOI: 10.1051/matecconf/20164802001