Space Weather Impact
Thermospheric Satellite Drag & Orbital Decay Analyzer
Geomagnetic activity — tracked here via the real, live Kp index — is a genuine, physically direct driver of atmospheric drag on satellites.
Kp index (live)
NOAA SWPC
Geomagnetic storms deposit energy into Earth's upper atmosphere, heating and expanding the thermosphere — the same layer where the International Space Station and most low-Earth-orbit satellites operate. That expansion increases atmospheric density at a given altitude, which in turn increases aerodynamic drag on orbiting spacecraft.
How it works
The Kp index is a genuine, direct, real-time proxy for this effect: higher Kp corresponds to more geomagnetic energy input and, correspondingly, more thermospheric heating and expansion. Increased drag causes satellites to lose altitude faster than normal, complicating orbit prediction — this is one of the real, practical reasons operators watch geomagnetic activity closely, independent of any effect on the satellite's electronics.