Milli SAT beyond-line-of-sight connectivity product

The Milli SAT H LM is a lightweight satellite communication terminal from Get SAT for beyond-line-of-sight connectivity on moving platforms. It is a fully integrated, ruggedized terminal that includes the modem and the block upconverter (BUC), designed for helicopters, boats and vehicles that need a higher data rate than the smaller Micro SAT and Nano SAT terminals can provide.

Everything needed for a working link is inside one unit: modem, antenna control unit, BUC, tracking sensors, low-noise block (LNB) downconverter and the full RF front end. The terminal operates autonomously and supports data rates above 20 Mbps. It is built for quick roll-on and roll-off installation, so the same terminal can be moved between aircraft, vessels or vehicles, and Get SAT quotes IP66 protection against dust and water jets.

The RF performance is given for two configurations. In Ka band the transmit range is 29 to 31 GHz or 27.5 to 30 GHz and the receive range is 19.2 to 21.2 GHz or 17.5 to 20 GHz, with a G/T of up to 11 dB/K, circular polarization and an EIRP of 48.2 dBW with a 25 W BUC. In Ku band the transmit range is 13.75 to 14.5 GHz or 12.75 to 13.25 GHz and the receive range is 10.75 to 12.75 GHz or 10.75 to 11.75 GHz, with a G/T of up to 7 dB/K, linear polarization with automatic skew control and an EIRP of 45.6 dBW with a 50 W BUC. G/T and EIRP set the receive sensitivity and transmit strength, which together determine the data rate available on a given satellite beam.

The antenna panel measures 25 x 27 cm and the complete system is 39.5 x 39.5 cm. The weight is 14.2 kg (31.3 lb) in Ka band and 14.7 kg (32.4 lb) in Ku band. Pointing covers the full 360 degrees in azimuth and -8 to 90 degrees in elevation, with tracking based on a combination of IMU and RSSI and optional GPS, a slew speed above 200 degrees per second on both axes, initial acquisition in under 30 seconds and re-acquisition in under 100 ms. These values determine how well the link holds through manoeuvres and turns.

The terminal takes 24 to 36 V DC and draws 25 W when receiving, and up to 200 W in Ka band with the 25 W BUC or 250 W in Ku band with the 50 W BUC. Interfaces are RS-232, Ethernet and transmit/receive RF connections, and the terminal is managed through a web interface or the Open AMIP 1.16 protocol with a software interface control document. Inmarsat has approved GX variants of the Milli SAT line for its Global Xpress service. Typical applications are rotary-wing and other airborne platforms, maritime vessels and land vehicles that need on-the-move broadband.