Pointing Data Format in the old TCS

The logger task produces a file called pointing.log in the default directory, recording a multitude of telescope parameters each time the log command is issued. This file is processed initially using

          jcmt_seed:[pointing]pointextract.com

An example of the resulting pointing file, with a name like

          pt991019_07.dat

is shown here .

The first line is the date, and observations occupy pairs of subsequent lines. The parameters displayed are as follows :

The first 8 on the first data line ( see the example ), and the parameters they represent are :

    143.35  81.88   -2.7   -4.5  07 59 02.1 IRC+10216
     az      el      daz    del  hh mm ss.s source

The remaining entries on the first line are

      RXB   RB    9.75  13.51 625.   1.3 63.1  0.1600 -0.3800
     F.E. coords  temp   Hum press    ?    ?    SMU_X  SMU_Y

The first entries on the second line are

-0.2686 FIVEPOINT        @RXB    20896  -4018
 SMU-Z  obs.type        TMU posn. TMU-X  TMU-Y 

and the last part of the 2nd line is

-2.7   -4.7 m99bn14         KKP
 uaz   uel  projid          TSS  

The abbreviations and implicit units are as follows :

• az - azimuth - degrees
• coords - coordinate system for source (RJ = J2000 etc)
• daz - total azimuth servo error - arcseconds
• del - total elevation servo error - arcseconds
• el -elevation - degrees
• F.E. - Front End ( = receiver)
• hh - hours of Hawaiian Standard Time
• hum - humidity - %
• mm - minutes of Hawaiian Standard Time
• obs type - observation type (FIVEPOINT, FOCUS etc)
• press - pressure - millibar
• projid - observation project identification (eg m99bu12)
• SMU_X - X-axis (up-down) position of Secondary Mirror Unit - mm
• SMU_Y - Y-axis (left-right) position of Secondary Mirror Unit - mm
• SMU_Z - Z-axis (in-out) position of Secondary Mirror Unit - mm
• ss.s - seconds of Hawaiian Standard Time
• temp - temperature - degrees C
• TMU posn. - Tertiary Mirror Unit position description
• TMU_X - X-axis position of Tertiary Mirror Unit - mm
• TMU_Y - Y-axis position of Tertiary Mirror Unit - mm
• TSS - Telescope Support Specialist identification
• uaz - user-defined azimuth offset - arcseconds
• uel - user-defined elevation offset - arcseconds

FIT9 data may be converted into TPOINT input version 4 using /home/imc/pointing/tpoint/poi2tpoint.exe.