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To conduct a study into the feasibility and viability of including a Short Messaging Service (SMS) within Galileo. The service could support a number of functions including both civil and commercial applications, resulting in savings to civil agencies, enhanced safety of life features and revenue generation for commercial entities.
The key issues in the study revolve mainly around the interoperability of the envisaged SMS service and the baselined Search and Rescue (S&R) service onboard Galileo. A standalone SMS payload must be form and fit compatible with the S&R payload to minimize impacts to the spacecraft design. Alternatively, a combined SMS/S&R payload must still meet the mass, volume and power resources set aside for the standalone S&R payload. In either case, the use of the existing S&R antenna for either a dual-mode payload or a standalone SMS payload must be investigated to minimize any impacts to the spacecraft design.
The combination of global, real-time S&R service with two-way messaging capability has several key advantages for both the Search and Rescue community as well as Galileo S&R/SMS customers.
The SMS payload itself functions as a simple transponder, as does the S&R payload. The key feature of the proposed SMS service is compatibility with the S&R service with no major impacts to the Galileo spacecraft design.
The study incorporates all aspects of a possible SMS service. Market demand for SMS service will be investigated and service scenarios including billing structures will be suggested. An assessment of any relevant regulatory issues especially concerning available spectrum will be performed. The baseline technical design of the SMS service will be formulated including such aspects as mission architecture, payload architecture, air interface, network and terminal requirements. In addition, a program plan including schedule, budget and work breakdown will be developed for a phase A study.