Ak has crossed polarisations, when compared to At.
Recording with -invert flag, so recorded data should be non-inverted.
Just before 03UT, possible drive error as source rising during scan…. No time lost…
08:54UT. Restarted schedule. Not clear if source changes were done ok or schedule was stuck… In fact it appears that high Elevation sources (>88 degs?) were flagged as down in the Vex and hence not in the schedule!