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MWA tiles were surveyed by professional surveyors, who present the results in UTM coordinates "easting", "northing" and "height". This is a standard system for surveyors, but the directions for "easting" and "northing" don't correspond to local east and north in general. We need to convert the surveyed coords to a standard cartesian coordinate system used by radio telescopes.
It is realimportant to note that the original tiles were surveyed a the south-west corner of the tile, so the true centre of the tile is +2.5 m to the north and east of this point.
Any comments about the other surveying trips by others who remember??
The basic recipe for conversion is as follows:
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