Suggested Radiosonde frequencies in amateur radio

144.390                 APRS tracking
144.900 - 145.100 Weak Signal, packet and FM simplex
145.500 - 145.800 Packet, misc and experimental

223.400 - 223.850 FM Voice Simplex or Packet

420.100 - 420.200  Auxiliary links, experimental
432.100 - 432.300  Mixed mode and weak signal
432.400 - 433.000  Mixed mode and weak signal
445.925                  APRS tracking (proposed)