Next message: Bill: "Re: Visit to Freiberg"
Alex,
The sharp changes, such as between 20 and 40 degrees are the
wandering to which I referred in an earlier post. For sextants
calibrated every 30 degrees, many of these changes would be missed.
For instance, your sextant would appear to have a slightly positive
bias if calibrated every 30 degrees. For more inaccurate sextants,
such as many of the wartime Husuns, the calibrations can change just
as abruptly, but the magnitude of the swings is almost 10 times greater.
Fred
On May 23, 2005, at 3:57 PM, Alexandre Eremenko wrote:
> Bill,
> The table of correction is
> 0 10 20 30 40 50 60 70 80 90 100 110 120
> 0 -4 -4 10 6 -1 4 5 -5 4 4 3 14
> The first line in degrees, the second one in seconds.
> When rounde to tenths of minutes
> it never exceeds 0.1' except 2 times
> when it is roughly 0.2'
