Up: Description of Associated Tasks
Warnings: JP May 30th, 2004.
- It is not clear that the image noise computed from the visibility
weights is correct when tapering and/or weighting.
- It is not clear what is the 4th element of UV_TAPER$.
Optimized version of UV_MAP using a .tuv table rather than a .uvt table
(i.e. in time vs channels order, rather than in the natural channels vs
time order). This version is disk-based, and computes the optimal number
of channels to be processed together based on the specified memory usage
by SPACEPPING. It is not memory limited, provided one channel fits into
virtual memory. This means that this task will be able to process ALMA
UV_INVERT makes a map from UV data by gridding the UV data using a con-
volving function, and then Fast Fourier Transforming the individual
channels. UV_INVERT can produce one beam per channel or a common beam
for all channels. In the latter case, the gridding is done only once,
thus neglecting frequency change between channels; this is of course
UV_INVERT can shift the map center and rotate the image, by shifting the
phase tracking center and rotating the UV coordinates of the input UV
UV_INVERT produces an output LMV cube (X, Y, Velocity) and a BEAM image
or cube from the input UV table.