Outage Probability Estimation for a Multi-hop Terrestrial FSO Link Simplified to a Dual-hop Scheme - Androutsos, N.A.; Nistazakis, H.E.; Manganaris, K.N.; Tombras, G.S.; Leitgeb, E.; Volos, C.K. (2020 9th International Conference on Modern Circuits and Systems Technologies, MOCAST 2020, 2020)