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Gday Chris
Playing with time is fun :-)
Your timezone is mainly used when converting between UTC and local time, it doesnt care where "exactly" on the planet you are.
LST is based on the GST, and adjusted by your longitude.
ie, If you have obtained the correct UTC time, then the LST calcs only utilise your longitude, so how accurately is that entered???.
Also, ( just for fun ) can you retry your test tomorrow morning.
Up until about 11:00AM local, we are one UTC day ahead of England and the US. If your LST calcs are being done via the net, and they are using a UTC day of yesterday ( relative to us ), you may still get back the 4min error.
I got caught on something like that when morning tests failed, after lunch tests worked :-)
Andrew
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