The GateHouse SB-SAT protocol stack is software for use in SB-SAT modems. By using a proven protocol stack, significant savings can be realised in terms of both time and money. Furthermore, it reduces risk in the development process of an SB-SAT modem.
The SB-SAT Protocol Stack is a mobile device protocol stack for use on Low-Earth Orbit Satellites (LEO), and in combination with Inmarsat’s I4 network of GEO-stationary satellites it enables global and continuous connectivity to LEO satellites. IP connectivity from LEO spacecrafts provide low-cost access to real-time command, control and telemetry with bandwidth up to 492 kbit/sec. Coverage is practically global at low LEO orbits while remaining fairly close to global at higher orbits. This provides satellite operators access to their satellites from anywhere.
The GateHouse SB-SAT protocol stack is an adaption of the market-proven BGAN Protocol Stack which has been deployed in more than 100,000 end-user terminals for land, maritime and aeronautical uses. SB-SAT is based on the aeronautical terminal classes and provides additional features for use in low-earth orbit:
- IP connectivity up to 492 kbit/s
- Antenna pointing
- Beam handover and satellite switching
- Predictive handover at spot-beam boundaries
- Accurate return link burst timing based on orbit extrapolation
- Predictive Doppler compensation
The protocol stack is fully conformance tested using Inmarsat test requirements and is validated using full-orbit simulation using the GateHouse BGAN Network Emulator. The capabilities of the emulator allow set up of realistic orbits with full simulation of beam-to-beam handovers and satellite switches.
Have any questions?
Contact me on +45 9932 4086 for more information or to set up a meeting.
- Thomas S. Jensen