Upcoming amateur radio satellite passes over your grid for the next 48 hours — when to be outside with the HT and where to point it.
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Orbital elements from Celestrak, refreshed every 6 hours. Predictions run in your browser.
AOS / LOS — acquisition and loss of signal: when the satellite rises above and drops below your horizon. Azimuths tell you where it appears and disappears.
Peak elevation is what makes or breaks a pass. Below 10° you're fighting trees and terrain; 30°+ is comfortable; overhead passes are the easy ones.
FM birds (SO-50, AO-91, the TEVELs) work with an HT and a handheld Yagi — or even a whip on a high pass. The ISS repeater (437.800 down) is workable the same way.
Tune for Doppler on 70cm: signals arrive up to ±10 kHz off frequency — program five memory channels stepping across the downlink.
Times are your local time, computed from current Celestrak elements. Fresh elements matter — predictions drift as TLEs age.