|The route (in red) of W5KUB-18, as it made its three (so far) trips around|
the world, as tracked on habhub.com.
The W5KUB-18 WSPR (Weak Signal Propagation Reporter) telemetry transmitter puts out 10 milliwatts and transmits on 14 MHz. It operates only on solar power (solar cells plus a 2-farad supercapacitor - no batteries), so it only transmits when it is in daylight. The balloon also transmits APRS (Automatic Packet Reporting System) data.
For updates and more details, visit <http://tmedlin.com/balloon-3-2/> or listen to Amateur Radio Roundtable on Tuesday evenings at 2000 Central time (0100 Wednesday UTC).