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Fourth batch of satellites for a reconnaissance satellite constellation built by SpaceX and Northrop Grumman for the National Reconnaissance Office to provide imaging and other reconnaissance capabilities.
Limiting rule: No flight through cumulus cloud with top at or above the freezing level.
max cloud-top 6844 m above freezing 4635 m (53% cover in 10 nmi) · no GLM flashes within 25 nmi / 30 min, likely cirrus / stratiform ice rather than cumulus · max-top 6844 m, mean 4849 m, 53% cover, freezing 4635 m · 6.7 ≥ 6 ft significant wave height
Notable launches include Sentinel-6 and Dart.