Skip to content
Home Academy Constellations & Orbits in Practice Planes, spacing, shells
LESSON 01 OF 6

Planes, spacing, shells

Beginner ~9 min Slide deck Free

A constellation is a coordinated group of satellites designed so their combined orbital geometry delivers coverage, capacity, or revisit that no single satellite could achieve.

A constellation is a coordinated group of satellites designed so their combined orbital geometry delivers coverage, capacity, or revisit that no single satellite could achieve.

What this lesson covers

Orbital Planes: Distributing Across Longitudes

An orbital plane is one ring-shaped path around Earth. Multiple planes at different orientations distribute satellites across all longitudes simultaneously.

Shells: Multiple Altitude Layers

Large modern constellations use multiple shells — groups at different altitudes or inclinations — each serving a different coverage or capacity purpose.

Key facts

💡A single orbital plane provides coverage only for the latitudes it overflies — and only when a satellite happens to be there.
Planes + spacing + shells = the blueprint for modern orbital networks.

When you see a constellation on Orbital Radar, the repeating dot pattern is planes and spacing made visible. Multiple altitude rings are shells.

All lessons in Constellations & Orbits in Practice
01Planes, spacing, shells~9 min02Altitude tradeoffs~9 min03Phasing & deployment~10 min04Station-keeping~9 min05Operational vs drifting~9 min06Mega-constellations: SSA challenges~9 min
All 6 LessonsAltitude tradeoffs →
🪐Support Us