... Observatory

The National Radio Astronomy Observatory (NRAO) is operated by Associated Universities Inc., under cooperative agreement with the National Science Foundation.

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... package

http://www.aips.nrao.edu

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... technique

Alternatively, a finite number of tangent facets could be used to supplement the ``w-projection'' grid and ``unboxes'' used in a manner similar to the implementation discussed here. Again, this would seem to reduce the benefits of the ``w-projection'' technique.

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