The AztechSat-1 CubeSat, which traveled to the International Space Station (ISS) last weekend on the 19th Space-X Commercial Resupply Services (CRS-19) mission for NASA, will listen for emergency messages in the 439 MHz range and retransmit them for amateur radio operators to copy on the 437.300 MHz downlink using the Winlink protocol, once the CubeSat has been placed into orbit. The satellite …
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Source: ARRL