Live coverage: Astra counting down to launch today at Cape Canaveral

Astra is counting down to the first of three launches this summer to deploy a fleet of six small NASA hurricane research satellites. Liftoff of Astra’s small launcher from Cape Canaveral with the first two TROPICS nanosatellites is scheduled during a two-hour window opening at 12 p.m. EDT (1600 GMT), weather permitting.