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In the (u,v,w) Coordinate System of an Interferometer is w=0 for an East-West Oriented Array?

31 Aug 2017, 18:46 UTC
In the (u,v,w) Coordinate System of an Interferometer is w=0 for an East-West Oriented Array?
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Question: For east-west telescope array, in u,v,w coordinate, its w=0. I want to know for north-south telescope array, Is its w equal to 0? Thanks — Shui
Answer: In fact, the w-coordinate in an interferometer points in the direction of the source being measured. More generally, the (u,v,w) coordinate system is aligned with (east,north,toward phase tracking center). The w-coordinate would be equal to zero for a planar array.
Jeff Mangum

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