How NASA knows when it's a 'go' for launch - Engadget

The launch window -- the span of time that a rocket can successfully launch during -- will therefore be different for putting an Earth-observing satellite into LEO versus launching a Dragon Capsule to precisely rendezvous with the ISS. https://www.engadget.com/how-nasa-knows-when-its-a-go-for-launch-164548385.html