A rain diversity switchover system includes a diversity Satellite Access Station (SAS) including a transmitter modem and a receiver modem in communication with a satellite. The system further includes a primary SAS including a transmitter modem and a receiver modem in communication with the satellite via a second satellite antenna, where the transmitter and receiver modems of the primary SAS are synchronized with the transmitter and receiver modems of the diversity SAS via a common time source. Further, a hub data processor adjusts a timing of transmissions from the diversity SAS to the satellite relative to the common time source in accordance with a difference between a time of flight from the diversity SAS to the satellite and a time of flight from the primary SAS to the satellite. Additionally, a switchover controller controls a rain diversity switchover between the primary SAS and the diversity SAS.