07:11:26 Friday 31 March 2017, Mike Ri. on 129.242.31.83 The VHF manda program developed a fault in the frequency setting of LO2 after a UHF-triggered crowbar which took down the VHF, around 22:20 UT on 30 March 2017. The frequency was offset by ca. -210 Hz so that Doppler velocities are wrong, but Ne seems OK. A red LED labelled 'alarm' was lit on the VHF Receiver box.