New Commands

The following new applications have been added:

CHANMAP

Creates a two-dimensional channel map from a three-dimensional NDF by collapsing along a nominated pixel axis in each of a series of slices. The collapsed slices are tiled with no margins to form the output channel map. A wide selection of statistics is available for the collapsing.

CLINPLOT

Draws a spatial grid of line plots for an axis of a cube NDF. This is particularly relevant to inspection of spectral-line data cubes. In addition to the normal spectral axes around a line plot, there may be spatial axes drawn around the grid. This application could be considered a hybrid of DISPLAY and LINPLOT.

INTERLEAVE

Forms a higher-resolution NDF by interleaving a set of NDFs of the same dimensionality.

MAKESNR

Creates a signal-to-noise array from an NDF with defined VARIANCE component, rejecting unusably small variances.

MFITTREND

Fits independent trends to data lines that are parallel to an axis using polynomials up to order 15. Regions containing features such as spectral lines or stars may be masked. It has an option to subtract the trend fits from the supplied NDF. The fitting regions may be located automatically.

NDFCOMPRESS

Compresses an NDF so that it occupies less disk space. The initial version has only one compression method, which scales using a linear transformation such that data values fit into a smaller data type. Applications accessing the compressed NDF can reconstruct the original unscaled values.

WCSMOSAIC

Tiles a group of NDFs using World Co-ordinate System information. It is like WCSALIGN but operates on more than one input frame, improving efficiency for that case.