This report examines the possibilities and advantages of the onboard application of wireless communication network technology to space missions. This Green Book describes a set of driving use cases in the space domain and evaluates the utilization of existing technologies and related terrestrial commercial standards to meet the resulting space-based use case requirements. Also included is relevant tutorial information intended to assist the reader in understanding basic concepts of wireless transmission and networking along with possible issues related to the deployment of wireless networks. The information provided in this report will enable member agencies to select the best option(s) available for space communications and internetworking, based upon evaluation metrics such as network topology, power expenditure, data rates, noise immunity, and range of communication as well as on space systems metrics such as reliability, availability, maintenance and safety