Jim, I dont really know when Bob switched off... On my grabber, the signal dropped sharply around 6 UT, thus the correlation peak was probably based on the first half of the sequence which ended 6:52
In 10 minute averages, the last block containing something that looks like signal began at 08:10 but I think the signal was off by 08:20 -- Paul Nicholson --
Hi Mike, normally the frequency scale with GQD lock should be very accurate, 12 mHz offset seems way too large. Is the samplerate lock status showing green? If yes, please temporarily retune the FFT