This application will bin the input image into elliptical annuli,
or into a `fan' of adjacent sectors, centred on a specified
position. The typical data values in each bin are found (see
Parameter ESTIMATOR), and stored in a one-dimensional NDF which
can be examined using LINPLOT, LOOK,
etc. A two-dimensional mask
image can optionally be produced indicating which bin each input
pixel was placed in.
The area of the input image which is to be binned is the annulus
enclosed between the two concentric ellipses defined by Parameter
RATIO, ANGMAJ, RMIN and RMAX. The binned area can be restricted to
an azimuthal section of this annulus using Parameter ANGLIM. Input
data outside the area selected by these parameters is ignored. The
selected area can be binned in two ways, specified by Parameter
- If radial binning is selected (the default), then each bin is
an elliptical annulus concentric with the ellipses bounding the
binned area. The number of bins is specified by Parameter NBIN
and the radial thickness of each bin is specified by WIDTH.
- If azimuthal binning is selected, then each bin is a sector
(i.e. a wedge-shape), with its vertex given by Parameters XC and
YC, and its opening angle given by Parameters WIDTH. The number of
bins is specified by NBIN.