Satellite connectivity onboard business and general aviation aircraft
The integration of satellite communications systems in general and business aviation aircraft responds to a consolidated operational demand: maintaining a continuous data link throughout the entire flight mission. Compact onboard terminal systems, such as those of the SDL-350 family, combine a reduced-aperture antenna with an integrated modem capable of managing the link via geostationary or medium-orbit satellite, distributing IP connectivity on board through a cabin Wi-Fi network that acts as a hotspot access point for passengers and crew. The functional architecture separates the satellite link management plane from the internal distribution plane, enabling critical operational traffic to be prioritised over end-user traffic. From a technical standpoint, link performance is conditioned by factors such as satellite elevation geometry along the route, obstruction masks inherent to the fuselage, and link budget management under conditions of heavy rainfall or low elevation angles. Current systems incorporate automatic gain control mechanisms and handover algorithms between beams or satellites to minimise service interruptions. The throughput capacity available to the user is determined by the service plan contracted with the space segment operator, and not exclusively by the physical capabilities of the terminal. In the business aviation segment, onboard connectivity has ceased to be an optional differentiator and has become a standard operational requirement. Corporate fleet operators and private aircraft owners demand access to videoconferencing applications, secure document transfer, and access to real-time flight management systems. This convergence of needs obliges systems integrators to dimension the solution not only in terms of aggregate bandwidth, but also in end-to-end latency and in the capacity to logically segregate cabin traffic from cockpit traffic when both share physical infrastructure. The regulatory framework applicable to the installation of these systems in certified aircraft requires obtaining the corresponding type modification approval or Supplemental Type Certificate from the competent airworthiness authority, a process that conditions integration timescales and limits the interchangeability of equipment between platforms. Additionally, operating the satellite link in the airspace of different jurisdictions entails compliance with the aeronautical mobile earth station licences in force in each State, an aspect that operators must address in advance of international route planning.
NASSAT - Network Satellite Systems