Telesat Expands Telesat Lightspeed with Military Ka-band to Capture Defense Market

Event summary

  • Telesat adds 500 MHz of military Ka-band (Mil-Ka) spectrum to its Telesat Lightspeed constellation, replacing commercial Ka-band spectrum on the user link.
  • The change is made without impacting the December 2026 launch schedule for the first two satellites, with only a modest cost impact.
  • Telesat Lightspeed will now offer interoperable Mil-Ka connectivity, enhancing its ability to support defense and sovereignty requirements.
  • The addition is driven by strong global demand from allied defense users, particularly NATO members, for LEO-based Mil-Ka capabilities.

The big picture

Telesat's move to add Mil-Ka spectrum to its Telesat Lightspeed constellation reflects the growing trend of defense organizations shifting from geostationary (GEO) to low Earth orbit (LEO) satellite communications. This strategic pivot is driven by the need for distributed, resilient, high-throughput, low-latency networks, particularly among NATO members and other allied governments. The addition of Mil-Ka connectivity positions Telesat Lightspeed as a key player in the defense satcom market, offering superior performance characteristics compared to traditional GEO Mil-Ka platforms.

What we're watching

Defense Market Demand
How the global demand for LEO-based Mil-Ka capabilities will shape Telesat's revenue growth and market positioning.
Execution Risk
The pace at which Telesat can integrate Mil-Ka into its constellation without further delays or cost overruns.
Competitive Dynamics
Whether Telesat can maintain a competitive edge over other LEO constellations targeting the defense market.