Mobile satellite modem for combined geostationary, medium and low earth orbit satellite operation

A computing apparatus comprising:

• a processor;
• and
• a memory storing instructions that, when executed by the processor, configure the apparatus to:
• trigger synchronization of a satellite modem to a carrier frequency of a beam of a satellite;
• retrieve an ephemeris information for the satellite and a beam configuration information for the beam;
• calculate a velocity of the satellite per the ephemeris information;
• and
• adjust a carrier frequency of the satellite modem when communicating via the beam to compensate for a doppler offset induced in the carrier frequency by the velocity,
• wherein the satellite has a satellite type selected from a Geosynchronous Earth Orbit (GEO), Medium Earth Orbit (MEO) or Low Earth Orbit (LEO) type of satellite, and the satellite type is different than a satellite type of an immediately preceding synchronization.