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IIRC a major sticking point was "antenna diversity": in addition to having something point down, Nav Canada wanted antennas pointing up for space-based ADS-B (N
by throw0101a 5y ago
IIRC a major sticking point was "antenna diversity": in addition to having something point down, Nav Canada wanted antennas pointing up for space-based ADS-B (NavCanada was an initial investor in Aireon).
But the extra antenna is still a bit pricey, but given Canada's vastness, satellites were the only way to get good overage outside of major urban areas.
NavCanada/Aireon would also be using 1090ES and not the UAT that the US allows for lower-flying GA planes as well.
However, if you're near the US border, your transponder can (IIRC) broadcast that you have an UAT receiver on-board (even if you have an 1090 transmitter), and the FAA's gear may send out UAT data (e.g., weather, UAT planes).
* https://skiesmag.com/features/diversity-matters-canadas-performance-requirements/ https://skiesmag.com/features/diversity-matters-canadas-perf...