Utility Commands

The utilities are commands that perform operation in the management of the astronomical catalogues. Between them you can find commands that execute coordinate conversions (precession or transformation between coordinates systems), that evaluate new catalogue fields as functions of existing fields, that sort catalogues with respect of a field, that verify the internal data coherence of data sets and the coherence between a catalogue and its description in the PDB system files. Other commands are useful to edit and fix a big catalogue and to change the files type (fixed or variable length).

The DIRA2 utility commands are:

DB_COCO
Perform coordinates transformation.

DB_CALC
To evaluate a new field as a function of other fields.

DB_CHECK
Verifies the catalogue data coherence

DB_SORT
To sort a catalogue according to a defined field

DB_EDIT
To modify fields value in a large catalogue

DB_FIXA
To create a fixed length file from variable record length

DB_UNFIX
To create variable record length files (VAX/VMS only)

DB_LINK
To link an user program with the DIRA2 subroutines


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