2017 Dec 06 -  TCS3 Engineering (T.Denault, D.Griep )

Goals
TCS3 pointing run. (1st half of night, Wed 12/06/2017, 6:45pm-11:45pm)


1. Encoder Measurement

Did not measure encoder ratios.
Asked DayCrew to clean/inspect gears/encoders/tachometer. - no reply from Daycrew. 

2. How is the tcs servo performance?

Tracking looks OK, Following error range is HA 0.119, Dec 0.245. Has slight/funny oscillation.
171206-tcs-tracking.png

3. Benchmark current TCS

Starting at 6:45pm
Using current TCS version  v171122.
Pattern: benchmark13

tpoint file:  b1.dat
.ape   file:  b1.ape

Done at 7:05pm
But only 12 (of 13) data was recorded.

4. Pointing Run

Starting at 7:15 - using GRID w/ 70 stars
Done taking data at 8:20 .. only 1hr 05min

tpoint file:  pointing.dat
.ape   file:  pointing.ape

fit using all data was 14.89 RMS (wow- good fit using all the data!)
used all data, RMS =  14.89
Removed 70,    RMS =  14.56
Removed  7,    RMS =  14.08
Removed 70,    RMS =  13.60

Removed 3 stars: line 70, 7, 70  using SLIST, then deleting
  outlier candidates. Got fit of: sky RMS 13.16

Adjusted data file is:  pointing-adj.dat

pointing.ps
pointing.pdf - tpoint graphs (postscript and PDF)
pointing_coeff.txt - resulting coefficients.

Updated .tcs-init with new coefficients
# coefficients from 2017/12/06 pointing run:
 IH        +42.6692 
 ID       -243.0673 
 NP         +0.0218 
 CH        -54.4107 
 ME         -3.0431 
 MA        +29.3558 
 HCES     +107.8917 
 HCEC      -49.8873 
 DCES     -446.6121 
 DCEC     +130.2660 
 FO        +38.1483 
 TF        -16.0647 
 TX        -45.7847 

5. B2 benchmark 

Doing benchmark "b2" with new coefficients
Started at 9:05 ... finished at 9:22

Now, let's compare the 2 benchmarks:

   Here is a graph of HA error of b1.dat vs b2.dat
   
   gnuplot to make the graphs:
       plot   'b1.ape' using 10 with linespoints  title 'b1 HA pt.madj'
       replot 'b2.ape' using 10 with linespoints  title 'b2 HA pt.madj'

   Here is a graph of DEC error of b1.dat vs b2.dat
   
   gnuplot to make the graphs:
      plot   'b1.ape' using 11 with linespoints  title 'b1 Dec pt.madj'
      replot 'b2.ape' using 11 with linespoints  title 'b2 Dec pt.madj'
   
6. Conclusion 

Point run when nicely. Many, if not all, were in the FOV from slew to slew.

New coefficients are almost equal, or just slighty better that the old one. 
   HA  has a slight improvment in the graph.
   DEC slop was about the same. 
Will keep the new TCS v171206 pointing coefficients.

Finished at 21:30

7. MISC 

DG says observer are not making userlist, but giving target verbally. Need to 
address this? but how?

Sound from the TCS goes to a monitor speaker, which has low volume. TCS speaker should be
a normal speaker with adjustable volume. It is important for operators to head sounds.