For each sensor at the station site, 1-minute data samples shall be transmitted in CREX format via the public geostationary meteorological satellites (METEOSAT or GOES) every 5 minutes and every five minutes via the redundant transmission option.
The system isn't perfect, however -- in this early incarnation it can only nab 40% of transmitted data before giving itself away, and more importantly, it requires the invention of a "quantum non-demolition box" before the attacker can be anywhere but the same room as the receiver, since right now both attacker and receiver need to be using the same photon detector.