What it is and the problem it solves
A satellite constellation is a group of artificial satellites working together as a system. It solves the problem that a single MEO or LEO satellite covers only a small, moving area—so persistent global coverage requires coordination, not isolation.
How it works
Satellites are placed in complementary orbital planes—often MEO or LEO—and linked via inter-satellite communication and globally distributed ground stations. Design prioritises satellite-to-target coverage, using structured patterns like Walker Delta to preserve geometry and reduce station-keeping.
What works
It delivers permanent global or near-global coverage: at any time, everywhere on Earth, at least one satellite is visible. This enables services like low-latency broadband, continuous Earth imaging, and resilient navigation where GEO fails.
What does not
A constellation does not guarantee uniform service quality. Coverage is persistent, but signal strength, handover reliability, and ground station access vary by region and time. Inter-satellite links are optional, not universal. Latency figures (30 ms for LEO, 125 ms for MEO) are best-case propagation delays—not end-to-end system performance.
What it changes
It replaces the geostationary bottleneck. A single GEO satellite imposes >600 ms round-trip latency and leaves polar regions poorly served. Constellations shift the trade-off from coverage persistence to infrastructure scale: many satellites, many ground stations, continuous orbital maintenance.
Is it worth your time
Yes—if your work depends on low-latency global connectivity or persistent Earth observation. No—if you need high-bandwidth, low-jitter links for real-time compute or mission-critical timing: constellations do not eliminate latency variance, ground dependency, or orbital decay costs.
