The Physical Stack
← Full stack narrative
01 · Orbitscroll = depth

LEO Constellations

Starlink-type low-Earth-orbit mesh

7,000+

active Starlink sats in LEO — and climbing

The network is no longer a tower on a hill. It is a moving shell of routers 550 km above you, replenished every few years.

Depth strataL1/4
  1. Shell geometryL1

    Thousands of co-orbiting nodes as a statistical surface

    Altitude bands stack like nested free-fall highways

    Coverage is density × inclination, not a single bird overhead

  2. Bus & powerL2

    Flat-panel mass, solar wings, thruster budget

  3. Aperture physicsL3

    Phased-array elements forming steerable beams

  4. Carrier → symbolL4

    RF/optical energy becoming packet symbols

Mechanism beats (4)
  1. 1
    Shells, not birds

    Thousands of satellites occupy altitude bands (shells). Coverage is a statistical property of density + inclination, not a single bird overhead.

  2. 2
    Phased-array steers beams

    Ground terminals electronically steer without moving parts. Beams hand off as satellites race across the sky at ~27,000 km/h.

  3. 3
    Laser inter-sat links

    Optical crosslinks turn the constellation into a spaceborne backbone — traffic can hop sat-to-sat without touching a ground gateway.

  4. 4
    Launch cadence is the product

    Reusability collapsed cost-to-orbit. The competitive moat is replenishment rate: how fast you can fill and replace a shell.

Scale

A full mega-constellation is a city of computers in free-fall

vs. a few hundred GEO sats that covered the 20th century

Stakes

Spectrum, debris, and gateways

Whoever owns dense LEO capacity owns a second internet layer for AI edge, defense, and regions fiber never reached.

spatial stageOrbit → micro
loading depth
SHELL 01 · ~340 km
180sats
Depth · Constellation

Coverage is a property of shell density, not a single bird overhead.

Thousands of free-fall routers form altitude bands around Earth

10 Mm
10³–10⁴ km shell diameter
scroll 0%
macroorders of magnitudemicro
  1. Constellation
  2. Orbital shell
  3. Satellite bus
  4. Phased array
  5. RF / optical link
  6. Bit stream

Enterprise decision brief

From technical spectacle to an executable decision.

Designed for

Connectivity operators · edge platforms · infrastructure investors

Where does orbital capacity create a defensible service once spectrum, gateways, terminal economics, and replenishment are treated as one system?

01 · Operating model

  • ↳Constellation density and coverage geometry
  • ↳Gateway, spectrum, and landing-right constraints
  • ↳Terminal economics and service-level design
  • ↳Replenishment cadence and debris exposure

02 · Decision artifacts

  • ↳Coverage and dependency map
  • ↳Ground-segment architecture
  • ↳Constraint and counterparty register
  • ↳Scenario model with explicit assumptions

03 · Diligence questions

  1. 01Which service depends on density rather than a single asset?
  2. 02Where does traffic touch a regulated ground boundary?
  3. 03What fails when launch cadence or spectrum access changes?

Governance boundary

This deep dive is a systems brief, not spectrum, orbital-safety, or investment advice. Deployment decisions require jurisdiction-specific engineering and regulatory diligence.

Scope a decision brief →

Spectrum, debris, and gateways

The bottleneck is not just rockets — it is spectrum coordination, collision avoidance, and landing rights for gateways on the ground.

Whoever owns dense LEO capacity owns a second internet layer for AI edge, defense, and regions fiber never reached.

LEO latency drops toward fiber-like numbers (~20–40 ms) because light travels less distance than bouncing off a GEO sat 36,000 km up.