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Version 4.1.1.0 of my lunar distance program for Windows is available
for download. In addition to solving the classic lunar distance
observation, it reduces altitude observations, solves time sights, and
functions as a geocentric almanac.

http://home.earthlink.net/~s543t-24dst/lunar3/

The main improvement is the elimination of a bug in the manual input of
star data. Last year, when I released a major update to my SofaJpl DLL,
I changed the angle units in the Star constructor from radians to hours
and degrees. The idea was to eliminate the annoying conversion of units
in any code that calls SofaJpl. Unfortunately, those annoying
conversions were already in my lunar distance program, and I simply
forgot to remove them.

The bug had no effect if you used the internal star catalog.

The dip computation is now based on the refractive invariant, as
recently described here. However, I don't use the approximate
corrections for temperature and pressure. Since SofaJpl contains a
precise model of refractive index as a function of temperature,
pressure, and humidity, it's easier to use that, than write new code.

The dip computation includes temperature and pressure, but uses a fixed
temperature lapse rate of -.009 °C/meter. That duplicates the Almanac
dip table almost perfectly at 1010 mb and 10 C.

   

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