Dear fel­low ama­teur radio oper­a­tors in Region 3 and Mem­ber Societies,

Refer­ring to the expla­na­tion from Grant VK5GR, HF Band­plan Com­mit­tee Chair of IARU Region 3, the observed sig­nal has been iden­ti­fied as a wide­band FSK trans­mis­sion with an approx­i­mate ±8 kHz fre­quen­cy shift, oper­at­ing at a rel­a­tive­ly slow sym­bol rate.

For more accu­rate obser­va­tion, oper­a­tors are advised to use an SDR with a min­i­mum band­width of 10 kHz or wider, allow­ing the full spec­trum of the signal—including both upper and low­er components—to be clear­ly visible.

In this regard, we kind­ly invite all ama­teur radio oper­a­tors, par­tic­u­lar­ly mem­bers of Mem­ber Soci­eties in Region 3 who have received this sig­nal, to con­tribute by sub­mit­ting their recep­tion reports through the Region 3 HF Mon­i­tor­ing Sys­tem at the fol­low­ing link:

https://forms.gle/iRAw8n1paRz2E8vP9

Your par­tic­i­pa­tion is high­ly valu­able in sup­port­ing fur­ther iden­ti­fi­ca­tion, tech­ni­cal analy­sis, and coor­di­na­tion relat­ed to this signal.

Thank you for your atten­tion and cooperation.

73,
Wis­nu YBØAZ
Pres­i­dent, IARU Region 3