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Learn Satellite Tracking

Plain-English guides to tracking satellites: how orbits and orbital elements work, how to read a pass, and how to work amateur radio satellites.

How Satellite Tracking WorksHow a tracker knows where a satellite is: orbital elements (TLE and OMM), the SGP4 model, why predictions drift and how often elements must be refreshed.How to Read a Satellite PassWhat AOS, LOS, maximum elevation and azimuth mean in a satellite pass prediction, why high passes are better and how to choose the right one for radio.Working Amateur Radio SatellitesA practical introduction to amateur radio satellites: FM voice satellites with a handheld, linear transponders, Doppler correction, antennas and etiquette.

Where to start

Read how satellite tracking works, then how to read a pass. If you hold an amateur radio licence, continue with working amateur radio satellites and check the live table.

Positions are computed from public orbital elements (CelesTrak / US Space Force 18th SDS) with the SGP4 model and are accurate to a few kilometres; amateur radio data from the SatNOGS DB (CC BY-SA). Not for navigation or safety-critical use. Method and limits · Radio coverage map · Live HF propagation data