A Systems Engineering Approach for Designing a Novel Optical Satellite Payload, Capable of Free-Space Optical Communication, Two-Way Time Transfer and Quantum Key Distribution

Kurzfassung

This Master Thesis designs a modular system which could serve as a satellite’s research payload, enabling that satellite to perform Free-Space Optical Communication (FSOC), Two-Way Time Transfer (TWTT) and Quantum Key Distribution (QKD). All three functions are represented by individual subsystems which are integrated into one system. This thesis was carried out in cooperation with the German Aerospace Center (DLR). This thesis provides a comprehensive background about the optical elements used for the systems as well as the state of art of FSOC, TWTT, QKD. This thesis furthermore introduces the current state of research of the DLR for each of these topics. Afterwards this thesis analyses different Systems Engineering approaches and tailors a middle-out approach which fits to the context of this thesis. The developed approach is used to design subsystems for FSOC, TWTT and QKD on a Logical Architecture. A Concept of Operations is designed, including an Operational Architecture of the possible use of the designed system. Building on the developed subsystems and the Concept of Operations, a system is designed which integrates all three aforementioned subsystems. The system is analyzed in terms of interfaces, synergies and meeting the goal of being a modular system. An outlook on next steps and technologies which could provide helpful is given.