Yes, I have seen those as well. It looks like these spikes always appear at the start when the status goes to 'Observing'. For that reason, they may just be sta

Yes, I have seen those as well. It looks like these spikes always appear at the start when the status goes to 'Observing'. For that reason, they may just be start-up artifact, where you have too less data point to arrive at an accurate estimate, resulting in a far too optimistic value.