Next message: Alexandre Eremenko: "Re: Historical question"
When shooting lunars, accuracy in the altitudes doesn't matter much. We've
all heard that. But how much does it matter? I propose that you can get by with
a 6 arcminute error for lunar distances around 90 degrees, assuming you want
no more than an 0.1 minute resulting error in the cleared distance, but that
generally the required accuracy (for constant altitudes) is proportional to the
sine of the distance which means that for short distance lunars, the altitudes
have to be significantly more accurate. This is yet another reason why short
distance lunars would not have been popular historically.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
