EME Calculator

Earth-Moon-Earth path loss, link budget, and real-time Moon az / el for antenna aiming. Moon position updates every 10 seconds; refresh to force an immediate recompute.

Station (callsign, grid, or "lat,lon")

Band (MHz)

TX power (dBm)

Antenna gain (dBi)

Detection BW (Hz)

System noise Tsys (K)

Enter your callsign or grid above to start the live Moon aim readout.