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How to reduce Inclinometry Data

How to reduce Inclinometry Data

  • The datafile is on the summit computers in /jcmtdata/raw/incline/yyyymmdd/.
  • Copy to Hilo
  • The new data format includes an extraordinary number of spaces tagged onto the end of each line. The easist way I have found to remove these extra spaces is to use sed; viz:

          sed -e 's/..........//g' filename > outputname         ( 10 spaces is adequate)

  • Divide into CW & CCW parts if necessary
  • sort (i.e. reorder) the CCW file.
  • Add (within pico this is ^R) the file   /home/imc/pointing/inc/inchead.dat. This completes the formatting of a file suitable for display by . .
  • /home/imc/pointing/progs/incdisp:
    • Channels TX, LX, RX. Check that these are all similar to each other, have values no more than 1000 units (mV) from zero, and have amplitudes of approximately 400mV. Compare with the example .
    • Channels TY, LY, RY. The TY and RY should be similar this time, and the inverse and 180 degrees out of phase with LY. Again, all data should be within 1000mV of zero and have amplitudes of approx 500mV. Compare with the example .
    • Channels TT, LT, RT. All should read about 100+50.
  • Run the new data set(s) as input(s) to /home/imc/pointing/progs/rlb.exe.
  • Use meandiff.exe to show the changes since last time. You should expect differences of only an arcsecond, with some small systematic components only.
  • Make the CW-CCW model difference file if both are available.
  • Use make_hybrid.exe
  • make .gif files of all plots for the report and copy into /web/html/JCMT/telescope/pointing/
  • Copy (scp) the hybrid model into /jac_sw/itsroot/src/tcs/params on the summit computers,
  • edit the second line to reflect the number of entries (often 806),
  • mv it into thi_trackmodel.dat
  • make (install), and do cvs commit.
Contact: Iain Coulson. Updated: Wed Nov 1 14:25:23 HST 2006

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