A pico-balloon tracker implementing WSPR transmission on ham radio frequencies.
For launch of this payload, a valid amateur radio callsign and permission for use on an airborne vehicle is required. To configure the software for flight, edit the defines for primary and secondary callsigns in tlm.h. The assignment of secondary callsigns is handled on KD2EAT's web site: http://hojoham.blogspot.com/2016/10/known-flight-ids.html