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Dear Irv and Calendrists,
Thanks for the SF spreadsheet. I look forward to checking it out.
Programming an automated calculation of the sine-wave parameters to achieve a match with a temperatures-table would be quite a task (which is why I haven't done it), with the system of nonlinear equations, but manually adjusting the parameters will get a match too.
One other thing: Victor mentioned a Texas town, Alpine TX, with anomalous temperature-lag. In the record-books, Alpine likewise seems to have unusually short temperature lags. So Alpine would be a good town for which to make such a spreadsheet.
Santa Cruz, too, has fog setting in during late summer, clearing up during September, giving a two-peaked summer. My Santa Cruz lag measurement was for winter, partly because of the summer fog, and partly because the middle of thermal winter seemed a worthwhile celebration day to determine.
Mike Ossipoff
Windows Liveā¢: Keep your life in sync.
Check it out.