Ground station

The antenna and supporting facility on Earth that talks to a spacecraft - sending commands up and receiving data down.

Why it matters

A satellite in low orbit is in view of any one ground station for only a few minutes per pass, so the data it collects is useless until there is somewhere to send it. That makes ground infrastructure a hard constraint on how much a constellation can actually deliver, and it is why ground-station-as-a-service has become a business of its own: operators rent time on someone else's global antenna network rather than building their own. The satellite is the visible half of the system; the ground segment is where the capacity limit usually sits.

In our data

Ground infrastructure recurs across our coverage precisely because it is the unglamorous bottleneck: the 144 low-orbit missions in our tracker all share the same constraint of short, infrequent contact windows, no matter who built the spacecraft.

Where we use it

Not to be confused with

The ground segment as a whole, which includes mission control, data processing and distribution - the station is only the radio link. Also distinct from a launch site, which is where rockets leave from, not where satellites are commanded.