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Two satellites for Europe's Galileo navigation system. Originally planned for launch on Soyuz-ST and then Ariane 6 but both were unavailable. Galileo provides Europe with an alternative to the American GPS and Russian GLONASS constellations, but will be interoperable with both systems.
Limiting rule: No flight through cumulus cloud with top at or above the freezing level.
max cloud-top 8125 m above freezing 4903 m (87% cover in 10 nmi) · no GLM flashes within 25 nmi / 30 min, likely cirrus / stratiform ice rather than cumulus · max-top 8125 m, mean 5666 m, 87% cover, freezing 4903 m