2 NAME

The  name  to be printed on the right side of the dirty image and
dirty beam plots (with extensions .LMV and .BEAM).

2 UV__TAPER

Parameters of the tapering function (Gaussian): major axis at 1/e
level [m], minor axis at 1/e level [m], and position angle [deg].

2 WEIGHT__MODE

Weighting mode: Natural (optimum in terms of sensitivity) or  ro-
bust (usually lower sidelobes) weighting. Use LET WEIGHT__MODE NA
for natural or LET WEIGHT__MODE UN for robust weighting.

The actual weighting methods implemented are Natural  and  Robust
weighting.  Robust weighting gives the natural weight to UV cells
whose natural weight is lower than a  given  threshold.  In  con-
trast,  if  the natural weight of the UV cell is larger than this
threshold, the weight is set to this (uniform) threshold. The  UV
cell  size  and the threshold value are contained in the UV__CELL
variable.

2 UV__CELL

UV__CELL[1] : UV cell size for robust weighting [m].   Should  be
of  the  order  of  half  the  dish diameter (7.5 m for PdBI), or
smaller.

UV__CELL[2] : Threshold for robust weighting. Default value is 1.
0 means natural weighting and infinite would mean uniform weight-
ing. Use UV__STAT WEIGHT to choose an educated value.

2 MAP__CELL

The map pixel size [arcsec]. It is recommended to  use  identical
values  in  X  and Y.  A sampling of at least 3 pixel per beam is
recommended to ease the deconvolution. Enter 0,0 to let the  task
find the best values.

2 MAP__FIELD

Field of view in X and Y in arcsec.  The field of view MAP__FIELD
has precedence over the map size MAP__SIZE when both ar non-zero.

2 MAP__SIZE

Number  of pixels in X and Y. It should preferentially be a power
of two, (although this is not strictly required) to  fasten  FFT.
MAP__SIZE*MAP__CELL  should  be  at  least  twice the size of the
field-of-view (primary beam size for a single field).  Enter  0,0
to let the command find a sensible map size.

2 MCOL

First and Last channel to image. Values of 0 mean imaging all the
planes.

2 WCOL

The channel from which the weight should be taken.  WCOL set to 0
means using the central channel.

2 CONVOLUTION

Select the desired convolution function for gridding  in  the  UV
plane Choices are
        0    Default (currently 5)
        1    Boxcar
        2    Gaussian
        3    Sin(x)/x
        4    Gaussian * Sin(x)/x
        5    Spheroidal
Spheroidal functions is the optimal choice. So we  strongly  dis-
courage use of any other convolution function.

2 UV__SHIFT

Logical variable indicating whether map center (i.e. phase track-
ing center) or orientation should be changed.

2 MAP__RA

New Right Ascension of map phase center. Used only  if  UV__SHIFT
is YES.

2 MAP__DEC

New  Declination  of  map phase center. Used only if UV__SHIFT is
YES.

2 MAP__ANGLE

Position Angle of the direction which will  become  the  apparent
North in the map. Used only if UV__SHIFT is YES.




































