📘 Definition
A TLE is a standardised text format that encodes a satellite's orbital parameters — including inclination, eccentricity, RAAN, argument of perigee, mean anomaly, and mean motion — at a specific epoch. Developed by NORAD in the 1960s, TLEs are the foundation of public satellite tracking. Orbital Radar uses TLEs propagated through the SGP4 algorithm to generate real-time positions. See What Is a TLE? for a detailed breakdown.