Not quite WSPR but a weak signal is sent from a stratospheric balloon SEBA-6 by SP9UOB on 21,115 MHz modulation DominoEX22
http://ukhas.org.uk/ukhas:superlaunchsat
You can receive frames and send it with
http://ukhas.org.uk/projects:dl-fldigi
also You can see actual positon of the ballon at
http://spacenear.us/tracker/
Launched at 09:00 UTC from Gliwice, POLAND
15m nice activity. Please tune up :)
Sat, 2013/12/28 - 09:36
#1
15m nice activity. Please tune up :)