AIPS NRAO AIPS HELP file for OVERLAP in 31DEC18



As of Tue Sep 25 9:50:14 2018



HELP SECTION

OVERLAP
Type: Adverb  (scalar)
Use:  To specify how overlaps are handled in imaging

Null value: <= 0
      Taken to mean do nothing about overlaps.

Tasks:
    IMAGR........Fourier transforms and Cleans uv data with wide-field,
                 interactive TV, and data weighting options.
                 IMAGR will review each field (if OVERLAP > 0) and see
                 if any components from it also fall in any other field.
                 If so, it will restore them there as well.  Note that
                 this is done by brute force convolution since the
                 components of one field do not fall on the grid points
                 of another field and is therefore fairly slow.
                 In addition, if OVERLAP > 1, IMAGR will use a sequence
                 of Cleaning designed to reduce the instabilities
                 inherent in Cleaning an object from more than one
                 field.  This functions only if DO3DIMAG > 0 as well.

EXPLAIN SECTION


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