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This map shows real-time radio propagation from stations operated near 144 MHz. It uses data gathered by Automatic Packet Reporting System-Internet Service (APRS-IS) from packet stations in the amateur radio service. The map shows activity from the past hour.
VHF Propagation Map. APRS Activity in North America. Paths of 500 km or more. Switch to 250 km view.
VHF Propagation Map. APRS Activity by Region. North America: EM82 740 km, EM68 510 km, FN00 270 km and 32 more.