Dr. Tony Phillips of spaceweather.com has built a method to track Earth's upper atmosphere by analyzing orbital decay data from SpaceX's Starlink satellites, along with constellations from Planet Labs, Amazon Kuiper, and Eutelsat OneWeb. He uses the 'B-star' drag term buried in Space Force tracking data to measure how much the atmosphere expands in response to solar activity, finding a roughly two-day lag between solar radio flux changes and atmospheric response.
theregister.com
· 2026-09-25
Researchers are monitoring the atmospheric drag experienced by SpaceX's more than 11,000 Starlink satellites to calculate a daily 'sink rate,' the altitude a typical satellite at 480 km would lose in one day without thruster corrections. In 2026 that figure has swung from 19.7 meters per day during quiet conditions to 127.6 meters per day during the year's largest geomagnetic storm in January.
spaceweather.com
· 2026-09-23
A new European report examines the growing risk of orbital collisions as active satellites have surged from roughly 1,000 in 2013 to about 17,000 today, according to CelesTrak. SpaceX's Starlink constellation accounts for most of this growth with around 11,000 satellites, while Amazon, Chinese internet constellations, and planned orbital data centers are set to add many more.
arstechnica.com
· 2026-09-23
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