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LEO Satellites Offer GPS Alternative

Ars Technica •
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Xona Space Systems plans to launch a fleet of 258 low‑Earth orbit Pulsar satellites that promise signals 100 times stronger than GPS, offering centimeter‑level accuracy even in dense urban canyons and indoors. The first six production satellites, slated for launch in October 2026, will deliver early service in 2027, with the full constellation expected to provide global positioning within a few centimeters.

“That added power means that we can get into that indoor environment that GPS can’t get to today,” said Adrien Perkins, co‑founder and VP of engineering. Pulsar‑0, already launched in July 2025, demonstrated a 95 % reduction in jammer effectiveness and improved native positioning from 4.2 cm to 1.5 cm after software updates.

The system will also offer a timing reference accurate to within 10 nanoseconds, using inexpensive software clocks rather than atomic devices. Potential customers are high‑value users such as defense, finance, and telecommunications, where reliability, integrity, and precision are paramount.

While the need for many LEO satellites poses a challenge, advances in low‑cost launches make the vision increasingly feasible.