John Carmichael asked: > Is the average EOT correction over the course of the entire year equal to > about seven or eight minutes? from (16+15)/2/2=7.75 min.. As 16 minutes is > about the extreme correction on Nov. 1st. and 15 minutes is the other > extreme corroction in mid Febuary. Does anybody know the exact average?
I reported on several different error statistics for EoT in a paper I gave at the Seattle 1998 NASS shindig. And I've promised Fred Sawyer that a write-up of my talk will eventually be submitted to _The Compendium_. Oh, for a few more hours in the day.... Mean error: 0.0 minutes (The average error over one year, taking into account the sign of EoT.) Mean absolute error: 7.2 minutes (The average error when taking all EoT errors to be nonnegative.) Root-mean-square error: 8.7 minutes (The square root of the average of the squares of all EoT errors.) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California
