G4DYA: Yes I have also observed the same GPS behaviour with Kiwi struggling to acquire sats after running a few hours. I noted this when the TDoA extension was introduced.
Seems that three of the transmitter sites are active: Krasnodar, Novosibirsk and Khabarovsk. Novosibirsk seems to be transmitting both in slot 3 and 4 on 14.88 kHz.