keps april 28 RS-21 1 27394U 01051C 02118.91153704 .01551966 14070-2 28475-2 0 912 2 27394 51.6267 295.9751 0012488 289.2154 70.7507 16.00816847 6302 Doppler: Primary Downlink 435.335 MHz CW/FSK (Doppler 435.325 - 435.345) Backup Downlink 145.825 MHz CW/FSK (Doppler 145.820 - 145.830) Kolibri will be transiting usually on the Primary channel of 435.335 mc. The Backup channel has been used occasionally. When you are listening for Kolibri, make sure you check both channels and you should adjust for Doppler shift. You may also want to have you tape recorder handy to record the voice recording from Kolibri.