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NASA tests autonomous space navigation system without relying on GPS

The FALCON payload successfully used orbital satellites and space debris as reference landmarks to calculate position and update object trajectories.

Updated Aug 27, 2026 · 13:20 UTC1 reports

The short version

  • NASA's Starling mission successfully conducted a three-day test of FALCON, an autonomous optical navigation system that determines satellite positions without GPS.
  • The software uses star tracker cameras and an onboard database of space objects to calculate spacecraft location and refine the trajectories of surrounding debris and satellites.
  • Developed jointly by NASA and Stanford startup EraDrive, the technology could support deep-space missions, lunar swarms, and autonomous space traffic management.
  • Later this year, all four Starling spacecraft will share tracking data in orbit to collectively refine their positions.

Key facts

  • NASA's Starling mission tested the FALCON (Fast Autonomous Lost-in-space Catalog-based Optical Navigation) system to enable GPS-independent space navigation.[ScienceDaily]
  • FALCON is a joint flight experiment created by NASA and EraDrive, a commercial startup originating from Stanford University research.[ScienceDaily]
  • The system used Starling's star tracker cameras to identify surrounding spacecraft and debris, matching them against an onboard catalog to calculate the spacecraft's orbit.[ScienceDaily]
  • Over three days of autonomous operation without ground intervention, FALCON improved the orbital trajectory estimates for more than 200 space objects.[ScienceDaily]
  • The underlying catalog loaded onto the spacecraft contained roughly 20,000 space objects and predicted orbits sourced from the U.S. Department of War.[ScienceDaily]
  • Later this year, the four spacecraft in the Starling mission plan to share tracking observations directly with each other to refine their positions collaboratively.[ScienceDaily]

What remains uncertain

  • The long-term performance and reliability of the system when deployed across larger, multi-spacecraft constellations in deep space or lunar orbits remain to be tested.[ScienceDaily]

Sources