Elevation is a satellite's angle above your horizon, from 0° (rising) to 90° (straight overhead). Paired with azimuth it locates anything in your sky; higher elevation means shorter range, brighter passes and stronger signals — a "high pass" is the one worth stepping outside for.
Understanding Elevation Angle
Elevation, range and the pass profile
For a circular orbit, elevation and slant range trade by spherical trigonometry: at 550 km altitude, 10° elevation puts the satellite ~1,900 km away, 30° about 1,000 km, zenith 550 km. Signal budgets inherit the curve (path loss falls as elevation climbs), as does pass duration — a low pass's long ranges also mean its usable minutes cluster round a brief peak, while a high pass spends generously above any mask.
From sky charts to steering antennas
Elevation-azimuth is the command language of pointing: pass predictions render as sky-dome arcs, telescope and dish mounts drive in alt-az, and access reports for ground stations tabulate elevation profiles per pass. Deeper tools stack constraints in the same frame — Sun avoidance angles, terrain masks per azimuth, keyhole limits where mounts cannot slew fast enough near zenith — all bookkeeping in the observer's two angles.