Investigating occasional Pirga spikes, I see a case for 6m.relm on 2 Oct, where at 20:28:16, the signal stops, at 20:28:51 (35s later) the signal resumes, at 20:28:53 (2s later) the sonic resumes being good, and at 20:30:21 (another 88s later) the IRGA signal becomes good. This is normal behavior after a power cycle, but why was there a power cycle to begin with? Other sensors stayed up through this time period, though need to recheck. However, another curiosity is that we don't have local USB data during this time period (there were several breaks in the files that were recorded), even though we have WiFi data.
Some strange things happening out there....