Here's proof that I have too much time on my hands:
https://docs.google.com/spreadsheet/...iNWZrNVE#gid=0
I don't have a clear explanation for the mismatch in scales, and I don't know how to reproduce "their" point at ~17:07 (there is no apparent reason why Doppler shift would have decreased from 16:55 to 17:07). And I can't be sure that I didn't make some basic mistake in the formulas. But other than that, I think the results look pretty good. You can make your own copy if you have a Google account, type in any numbers in green fields and try to match the lines in the plot.