http://forums.dpreview.com/forums/read.asp?forum=1036&message=39090456
Well, it is specified that the O-GPS1 has an accuracy in bearing (direction) location in +/-5 degrees but actually it has been just out of the specified range for a deviation which is just more than a -5°, when it is checked against the landmark as shown in the following photo, i.e., the power station:-
The detected result and the landmark are geo-tagged as follows:-
Nice test, btw! Maybe afterall Pentax should state a further +/-5% deviation on top of the specified +/-5 degrees pointing error on the bearing so as to place safe!~ ;-)
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O-GPS1 Astrotracer Examples