Hi Peter,
You are a little ahead of me on this. I have actually been thinking about the same problem. Andy Martyn used to have a great site about his Bartelised scope. He had the following info on it which I hope helps:
"A note for those of us in Australia that the time zone should be a negative number to get the sidereal time right and that the longitude should be positive. Thus for my location in Melbourne at 145.06855E 37.81029S the values are:
Longitude 214.93 145, Latitude -37.81O29. TZ -10."
Does that answer your question?
If not, I'm sure Bojan would be able to advise you.
Rod.
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