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Thanks to those of you who responded to my question about whether L and d should be treated as signed or unsigned in the hav-Doniol solution when being taught to students. Unfortunately, there were not enough responses to make a statistically sound decision. FWIW, I am leaning toward treating them as signed.

In the meantime, I made a hav-Doniol work checker for Windows (first beta attached) which should allow people just learning the method to easily check their math and haversine table use. It is in the style of the Celestial Tools SR Methods tool. It uses Gary's format, which Greg seemed to like. It also includes the option for four- or five-place haversine tables. It just gives the result of the multiplication, without showing any work, since it seems that we all have different multiplication preferences.

For L and d with tenths of minutes, the math is done with the values unrounded, and the results rounded to whole minutes.

As some email clients do not allow executable attachments, the program has an exx suffix. Change it to exe before running.
[from FER: changed to a .zip archive... just download and open]

Let me know what you think.

Stan

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