Revisit time is the gap between successive opportunities for a satellite (or constellation) to observe a specific ground target. It drives mission design, tasking, and commercial value.
Revisit time is the gap between successive opportunities for a satellite (or constellation) to observe a specific ground target. It drives mission design, tasking, and commercial value.
A satellite passing overhead doesn't guarantee a useful observation. The target must fall within the instrument's field of view — and for EO, skies must cooperate.
The primary reason to build a constellation rather than a single satellite is revisit improvement — distributing coverage across multiple orbital planes.
Single satellites give fine detail; constellations give frequent access. Most modern missions need both — driving the explosion of LEO megaconstellations.