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Subject: re Lars Tornqvist nav program
From: Peter Fogg (ffive@XXX.XXX)
Date: Wed Feb 06 2002 - 00:52:29 EST
Looks very interesting, Lars, and must represent a huge amount of work.
a few queries:
Will it run on Macintosh computers?
Is it independant of the correct GMT being displayed on the computer's
clock? Mine is decidedly inaccurate, although it is regularly updated to
this local time. Can the relevant local time only, with the appropriate
correction, be used?
I enjoy solving (or not) the navigational problems such as the 'Silicon
Sea' series on the Nav. list. These can involve data from all over the
world and any time zone, and any year. My own approach is to always
start with local time and convert to GMT when necessary. Could your
program cope with these parameters? For example, I note that the almanac
is good for the next 10 years but how far back does it go?
Your example shows an assumed postion in whole degrees. How would it
cope with a DR position that may involve one tenths of a minute of long.
or lat. ? (Personally I think that a DR to the nearest minute is all
that is needed or practical but the problem being worked on may use
greater precision)
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