2883 x 28.38310 days = 81828.4773 days = 224.03026 (sidereal) years3107 x 26.3365 days = 81827.5055 days = 224.02759 (sidereal) years3247 x 25.2 days = 81824.400 days = 224.01901 (sidereal) yearsand pretty much equals 20 sunspot cycles, the number of cycles between shallow and deep grand minima - see the paper I sent you separately. Now how to account for cycles of 13 sunspot cycles or about 144 years.
From your post Mon. March 15th"Earth has experience exceptionally strong tidal forces in the years 1247, 1433, 1610, 1787 and 1974" the intervals are 186, 1777, 1777 and 187 years - interesting - why the 10 year shift?and"These first peaks in asymmetry in the SIM occur in the years 1251, 1432, 1611, 1791, and 1971," the intervals are 181, 179, 180, 180 years" Jose cycle??
Ian I sent you a link yesterday to some pertinent work that I have been doing. Overnight I had some additional insights, so have updated the work. The link is https://docs.google.com/fileview?id=0B2il0OKRz_AwZjM3YzU2OGMtMjJjZC00Yzk0LTkyM2UtZmZjZTAzOTNjNTgx&hl=en . I have also sent this link to Geoff Sharp.
Murray, I cannot view your link - you will have to contact me by email.