Kp Index (Geomagnetic)
A measure of solar storm activity from 0 (quiet) to 9 (extreme storm). During high Kp events, GPS signals can be unreliable or completely lost. Your drone relies heavily on GPS to hold position, return home, and avoid obstacles. During a storm it may drift, fail to hover, or fly off course.
Kp 0–3 — GPS reliableKp 3–5 — some disruptionKp 5+ — GPS unreliable