imagermultiscale(msname, imsizes, cellsizes, scales, nitermult, niterpower, fields, spwid, centerfield)
Description
Based on user-specified image sizes and cell sizes, we make several rounds of
multiscale clean images and use each model image as a fisr guess for
successively higher resolution images. After the first image, each clean
is solving for deltas, and will tend to be neither positive nor negative.
For each round of multiscale cleaning, uniform weighting with a uv taper
coresponding to 2.5 times the cell size is used. The number of
multiscale clean iterations used in each round is given by
niter = nitermult*imsizes[i]niterpower.
|
(1.10) |
Returns
Bool
Arguments
msname |
|
Name of input ms |
|
|
Allowed: |
String |
|
|
Default: |
'' |
imsizes |
|
Image sizes for each round (should be monatonically increasing) |
|
|
Allowed: |
Vector of Ints |
|
|
Default: |
[128, 256] |
cellsizes |
|
Cell sizes [in arcsec] for each round (should be monatonically decreasing) |
|
|
Allowed: |
Vector of Floats |
|
|
Default: |
[2, 1] |
scales |
|
Name of input ms |
|
|
Allowed: |
Vector of Ints |
|
|
Default: |
[0, 5, 15] |
nitermult |
|
Multiplier parameter used to adjust niter with imsizes |
|
|
Allowed: |
Float |
|
|
Default: |
0.15 |
niterpower |
|
Exponent of imsizes used to adjust niter with imsizes |
|
|
Allowed: |
Float |
|
|
Default: |
1.2 |
fields |
|
Vector of field ids to image |
|
|
Allowed: |
Vector of Ints |
|
|
Default: |
[1] |
spwid |
|
Spectral window to image |
|
|
Allowed: |
Int |
|
|
Default: |
1 |
centerfield |
|
Field id for central pointing |
|
|
Allowed: |
Int |
|
|
Default: |
1 |
Example
imagermultiscale(msname='orion.ms', imsizes=[128, 256, 512], cellsizes=[16,8,4],
scales=[0, 5, 15], nitermult=0.15, niterpower=1.2, fields=[1:4],
spwid=[1], centerfield=1);
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Up: imager - Module
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2006-10-15