If an NDF is specified using Parameter NDF, then the positions should be given in the current co-ordinate Frame of the NDF. Information describing the co-ordinate Frames available within the NDF will be copied to the output positions list. Subsequent applications can use this information in order to align the positions with other data sets.
If no NDF is specified, then the user must indicate the co-ordinate Frame in which the positions will be supplied using Parameter FRAME. A description of this Frame will be written to the output positions list for use by subsequent applications.
The positions themselves may be supplied within a text file, or may be given in response to repeated prompts for a parameter. Alternatively, pixel centres in the NDF supplied for Parameter NDF can be used (see Parameter MODE).
The output can be initialised by copying positions from an existing positions list. Any positions supplied directly by the user are then appended to the end of this initial list (see Parameter INCAT).
If a null (!) value is supplied, the positions will be stored in the current Frame. [!]
This parameter is only accessed if the parameter NDF is given a null value.
KAPPA --- Kernel Application Package