JCS_V5_N1_RevP2 Pooja Sharma Sharad Mohan Shrivastava Anuja Mishra Prachi Agrawal Rahul Parganiha Journal on Communication Engineering and Systems 2277-5242 5 1 32 38 (IsOWC) Intersatellite Optical Wireless Communication, Intersatellite Links (ISL), Free Space Optics (FSO), Qfactor, Bit Error Rate(BER) The Objective of this review paper is to make the readers understand the key terms related to Intersatellite Optical Wireless Communication System to help them carry out their future project work.The concept of wireless communication system has paved its way in optical communication system replacing long lengthy fibers which were previously opted. This has enabled optical wireless systems to be used in free space communications as well. A network is required enabling communication between the satellites prevailing in space because of increasing number of satellites in free space. Higher data rates of Gbps can be achieved using laser communication along with greater distance offered. The communication being carried out between the satellites in space via optical wireless systems is basically termed as Intersatellite Optical Wireless Communication (IsOWC). In this review paper, Intersatellite Optical Wireless Communication (IsOWC) system modelling and simulation for performance characterization and estimation are specifically understood and discussed. The system parameters namely bit rates, receiver sensitivity and distance of LEO and GEO intersatellite links were found.The intersatellite link was designed and simulated using a known optical system simulator named OptiSystem by Optiwave. November 2015 - January 2016 Copyright © 2016 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=4865