In 2021, a team from The Ohio State University, led by Zak Kassas, director of the Autonomous Systems Perception, Intelligence, and Navigation (ASPIN) Laboratory, made a groundbreaking discovery. They figured out how to eavesdrop on signals from six Starlink satellites to locate points on Earth with an accuracy of about 8 meters. This process did take some time—around 13 minutes—but it was a promising start.
Kassas explained that intercepting these signals isn’t easy. Starlink constantly adjusts its technology to provide high-speed internet. Satellites switch beams and alter signal timing, which complicates the task of pinpointing locations.
To overcome these hurdles, the team used Doppler measurements to track changes in signal frequency based on the satellite’s movement. They also applied advanced software algorithms to fix timing errors. Plus, they combined different types of antennas, which allowed them to connect with several satellites at once. By 2025, they managed to improve accuracy to within 2 meters, producing results in just 20 seconds by using signals from three Starlink satellites.
Kassas and his researchers didn’t stop at just Starlink. They also tapped into signals from other satellites like Orbcomm, Iridium, OneWeb, and NOAA. “I’m not just focused on Starlink—I value all the options,” he mentioned.
Their experiments have tested this new navigation system with vehicles, drones, and high-altitude balloons. One of their latest trials showed that mixing signals from both Starlink and OneWeb enhanced navigation for ships off Greenland’s west coast, hinting that this technique could be effective worldwide.
This progress points to exciting new possibilities for GPS alternatives. As Kassas noted, there’s a strong demand for reliable navigation solutions. His team has already shared their technology with some organizations, reflecting a growing interest in alternatives to traditional GPS systems. As we look ahead, it seems we might not have to wait long for these innovations to become available.
Source link
