[Xastir-dev] Position accuracy

[Jack Twilley]

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I'm setting up my Motorola M12 Oncore to perform a site survey so I
can use it for my stratum-1 time server at home.  A pleasant
side-effect of this operation is getting a much more accurate location
for my home station, on the order of hundreds of nanodegrees.

The map window's position is given in microdegrees, which gave me hope
until I went to configure my station's position to find I was limited
to milliminutes (nice unit, eh) for resolution.  Now, since one minute
is one-sixtieth of a degree, there are 60000 milliminutes to each
degree.  That's almost as good as 100000 microdegrees to each degree,
but it got me thinking.

It's obvious that milliminutes was chosen to make it easier on
transmitting and the like, but it might be better to use either
decimals of arbitrary precision or raw xastir coordinates.  It will be
potentially more precise and will probably save time, code and memory
in error-checking and conversion.

Thoughts?

Jack.
- -- 
Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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