Keywords: point

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## Reducing data

To reduce optical pointing data, work on BURE02, in the [OBS.POINTING] directory, and use POINT, specifying the RLTDATA:[OBSERVER.POINTING] Date.OPT file as input:

    $ SET DEF [OBS.POINTING]
    $ POINT
    POINT> FILE Date OPTICAL
    POINT> READ Antenna_Number
    POINT> SOLVE
    POINT> [ Other commands ]

The file is fetch by default from directory RLTDATA:[OBSERVER.POINTING]. A fit will be made with the free parameters `IAZ IEL+COV COH MVE MVN`, and all other parameters fixed at zero. A fit with more free parameters (e.g. ELEC and NPE) can be made using the commands :

    POINT> PARAMETER NPE/FREE
    POINT> PARAMETER ELEC/FREE

Optical pointing gives only the sum `IEL+COV`. The zero of the elevation encoder is an antenna constant. After a fit by POINT all parameters should be replaced in the antenna-station parameter file.