Sub-system
A constellation is useless without ground infrastructure: gateway stations connecting it to terrestrial networks, user terminals, and the operations that keep hundreds of spacecraft coordinated. It is unglamorous, it is a large share of the capital cost, and it is frequently the part that takes longest.
In one sentence
The ground segment comprises the gateway earth stations that link satellites to terrestrial networks, the user terminals that connect to them, and the control centres that operate the constellation.
Gateways need land, power, fibre backhaul, spectrum authorisation and a location with clear sky and low interference — and one in each region the service covers, since a satellite without an inter-satellite link can only deliver traffic to a station it can currently see. Each of those requirements is a local permitting and property problem, not an engineering one.
User terminals are where the volume is and where the cost engineering matters most. A consumer terminal is a phased array that has to be manufactured in the millions at a price a household will pay, which has meant selling them near or below cost as the entry point to a subscription.
Rather than building its own network, an operator can buy antenna time from providers who run stations globally and sell scheduled access, including through cloud platforms. That converts a large capital project into an operating cost and has removed one of the barriers to smaller constellation operators.
The terminal is the product the customer touches and a substantial share of the cost of acquiring them. Reducing its cost — fewer array elements, cheaper beamforming silicon, simpler installation — has a larger effect on the business than most satellite improvements, which is why so much engineering attention goes there.
Flying hundreds of spacecraft requires automated collision avoidance, orbit maintenance and health monitoring, because no team can manually operate them. It also requires coordination with other operators, since the same orbital shells are increasingly shared — an operational discipline that did not exist when there were a few dozen satellites.
3 of these are marked as a chokepoint: a handful of qualified suppliers, a multi-year lead time, or a single geography.
Gateways are terrestrial facilities needing land, permits, power and high-capacity fibre, in every region served.
Site selectionConsumer terminals must be manufactured in very large volumes at a price the market accepts.
Compound semiconductorsOperating in a country requires its authorisation; coverage maps are as much regulatory as technical.
Other pages in this map that name Ground segment as something they cannot do without.
What each company supplies at this step, and — where a public figure exists — its share of this specific market — with what that share measures, the period it covers and who published it. Some rows also show the company’s own reported revenue for the segment covering this step, which is a different thing: it says how much this business matters to that company, not how much of the market it holds. Not a ranking and not a recommendation.
Operates satellite networks and supplies ground and terminal equipment.
Operates ground station services and its own satellite programme.
Operates satellite network and ground infrastructure supporting connectivity services.
Supplies ground systems, antennas and mission processing.
Supplies the virtualised ground systems and signal processing behind much of the commercial fleet.
Supplies ground terminals and gateway equipment, including for the low-orbit constellations.
Supplies modems, amplifiers and the troposcatter equipment on the same networks.
Runs the polar ground-station network most Earth observation missions download through.
Whether ground-station-as-a-service becomes the default for new operators.
Whether terminal costs fall far enough to widen the addressable market.
Whether landing rights and local licensing constrain coverage more than technology does.
Each page explains one technology in plain language, states what it depends on, and names companies by what they supply at that step. Company roles are described qualitatively and deliberately carry no market shares, revenue figures or rankings — those change faster than an explainer can, and a stale number is worse than none. Ticker links point at company pages on this site and are provided for reference only.
Nothing here is investment advice, a recommendation, or a forecast. A company named on a page about a technology is not thereby a good investment, and the chokepoints described are structural facts about supply chains rather than predictions about prices. Technology moves; where a page describes something as unresolved or in development, that was true when it was written.
Plutux is not an investment adviser. Market data and AI-generated analysis are for information and education only, not investment advice. Disclaimer