Link
Calendario Contest ______> http://www.qsl.net/contest_ari/calendario.html
425 dx news_____________> http://www.425dxn.org/
propagazione ____________> http://www.hamqsl.com/solar.html
Near-Real-Time MUF Map__> http://www.spacew.com/www/realtime.php
AMSAT _ ( satelliti )_______> http://www.amsat.org/?page_id=177