Next Passes (48-hour window)
Satellite Next Passes & Freq Reference
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| Satellite | Mode | Uplink | Downlink | Tone | Next Pass | Max El | Duration |
|---|---|---|---|---|---|---|---|
| Calculating passes | |||||||
Select a city above to calculate passes
How to Use
Elevation
Max El
Higher is better. Passes >30° give the best contact windows. Only passes >10° are shown.
FM Satellites
FM Mode
Use a simple 2m/70cm dual-band handheld. A tone (CTCSS) may be required to open the repeater.
Linear Transponders
LIN Mode
SSB/CW through a linear transponder. Requires full-duplex operation with Doppler compensation.
ISS Voice
145.800 MHz
ISS downlink is 145.800 MHz. Listen during school contacts or open crew sessions. No tone needed to listen.
Pass Window
48 Hours
Predictions cover the next 48 hours in 30-second steps. TLE data refreshed hourly from Celestrak.
Data Source
Celestrak
TLE data fetched via server-side proxy from celestrak.org AMSAT element set, cached for 1 hour.