[Mountain_Skies]

Leap seconds are such a pain. I understand why they cannot be allocated algorithmically but that doesn't make them any easier to deal with.

[umvi]

Aren't leap seconds built into GNSS protocols? i.e. if you have a GNSS receiver, leap seconds will be accounted for in ZDA NMEA sentences.

[gmrple]

Yes, the satellites should know 6mo in advance. UTC is still a head ache though.