NavList:

Hi Peter,
On way to cut down on calculation in determining the reference slope is to reduce only one of the two initial reference sights for an arbitrary time around the initial time of the real sights series; then looking at the data of the first sight LHA1, Htab,Z and d, look for the data of the next LHA2 (LHA1+1deg.), this is equal to a 4 min. increase in the time for the first reference slope sight and ensure that you get an LHA2 round number.
If the two d-corr. are identical there is not even the need to calculate Hc, but both Htab can be used in plotting the slope since it will not change the slope itself.
My two cents, good posting.
Paolo
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