European Southern Observatory New Technology Telescope

General :
Observations :
Operations :

Pointing Errors Monitoring

The program written  to analyse pointing data obtained by monitoring the
position of the guide star on the AG screen has been installed on kila
in the nttdoc account in the following directory:

 ~nttdoc/maintenance/archive/pointing/agMonit

In this directory, the input files are:

GuideStarAcqSideA.point
GuideStarAcqSideB.point

These files can direcly be ftp'ed from wa5tcs to get the latest
measurements collected where there are located in directory:

/vltdata/tmp

The program called agPointMonit offers a wide variety of options, this
is detailed in the header of the C source file. Here is an extract of
this header:

************************************************************************
*   NAME
*   agPointMonit - computes the telescope depointing from position
*                    of guide star on AG screen.
*
*   SYNOPSIS
*   m1PointMonitAg [side] [graphDisplay] [startingDate]
*
*   DESCRIPTION
*
*   The inputs are :
*       [side]:   A or B
*
*       [graphDisplay]: 0 -> No graph displayed
*                       1 -> norm of depointing
*                       2 -> X/Y graph of depointing
*                       3 -> alt/az graph of depointing
*                       4 -> az error vs parallatic angle
*                       5 -> GP distance to center
*                       6 -> depointing vs GP distance to center
*                       7 -> depointing of last 10 meas.
*
*       [startingDate]: only data collected after this date are considered
*                       in the calculation
*                       [if -1, then all data]
*

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