VertexRSI Antenna 1 Solar Loading Tests


TIP Last Update: JeffMangum - 14 September 2008

Test Overview

On 2008/08/06-14 Lewis and Pere performed tests to investigate how heating the antenna affects all-sky pointing. The tests involved the following:

  • Track Sun with:
    1. Antenna surface facing Sun for several hours before sunset. Do all-sky OPT runs after sunset for several hours.
      • Test done 2008/09/06.
        • Did daytime pointing, then tracked 1 degree from the Sun for 3 hours (until Sunset).
        • Tracked Sun from 19:18 to 22:18 UT (Sunset).
        • Followed with three night-time pointing runs.
        • Seeing measurements made with night-time pointing runs.
        • See 2008-09-06/allsky01, allsky02, seeing01, seeing02, 2008-09-07/allsky01, and seeing01 for details.
        • NOTE: acuReport was run only during seeing measurements. Need the temperature sensor information to diagnose structural deformations due to temperature. Will re-do this test.
      • Test repeated 2008/09/08.
        • Tracked Sun from 19:00 to 22:15 UT (Sunset).
        • Followed with three night-time pointing runs.
        • Seeing measurements made with night-time pointing runs.
        • See 2008-09-08/illumination01, seeing01 and seeing02 for details.
    2. Antenna back to Sun for several hours before sunset. Do all-sky OPT runs after sunset for several hours.
      • Test done 2008/09/07.
        • Tracked with antenna back-on to the Sun from 19:00-22:22 UT (nearly 3.5 hours) before Sunset.
        • Followed with three all-sky optical pointing runs.
        • Seeing measurements made with night-time pointing runs.
        • See 2008-09-07/allsky02 through allsky04 and seeing01 through seeing04 for details.
        • NOTE: acuReport was run only during seeing measurements. Need the temperature sensor information to diagnose structural deformations due to temperature. Will re-do this test.
      • Test repeated 2008/09/09.
        • Tracked back-on to Sun from 18:35 to 22:22 (about 3 hours) before Sunset.
        • Followed with three all-sky optical pointing runs.
        • No seeing measurements made.
        • See 2008-09-09/illumination01 for details.
    3. Left side of antenna surface facing Sun for several hours before sunset. Do all-sky OPT runs after sunset for several hours.
      • Test done 2008/09/11.
        • Tracked 90 degrees from the Sun illuminating left side of antenna for 3 hours (until Sunset).
        • Followed with three night-time pointing runs (two were good).
        • No seeing measurements made.
        • See 2008-09-09/illumination01 for details.
        • NOTE: AIV weather station pressure indicator was foobar during these observations, corrupting the refraction correction. As can be seen below one can reconstruct measurements by adding a TX term to fit, but this adds considerable uncertainty. Will re-do this test.
      • Test repeated 2008/09/12-13.
        • Tracked 90 degrees from Sun illuminating left side of antenna for 4 hours before Sunset.
        • Followed with three all-sky optical pointing runs.
        • No seeing measurements made.
        • See 2008-09-12/illumination and 2008-09-13/illumination01 for details.
    4. Right side of antenna surface facing Sun for several hours before sunset. Do all-sky OPT runs after sunset for several hours.
      • Test done 2008/09/13-14.
        • Tracked 90 degrees from the Sun illuminating right side of antenna for 4 hours (until Sunset).
        • Followed with three night-time pointing runs.
        • No seeing measurements made.
        • See 2008-09-13/illumination2 and 2008-09-14/illumination1 for details.

Test Summary

Point of the solar loading tests is to see how temperature gradient affects pointing performance. Summary points are:

  • Clear temperature-gradient induced azimuth axis tilt measured.
  • Tiltmeter metrology can correct for azimuth axis tilt if it functions properly.
  • Many pointing runs yielded reasonably good RMS even with need for tilt correction.

-- JeffMangum - 14 Sep 2008

Analysis Summaries

Front-Side Heating (2008/09/06)

  • 2008-09-06/allsky01/tpoint09-06-2008_183314.dat: Clear azimuth axis tilt change during allsky01 run. Fit to standard model with only IE and CA allowed to vary:
       coeff       change     value    sigma

  1     IA                  +216.76
  2     IE         +0.000   -958.49    0.311
  3     CA         +0.000   -383.94    0.311
  4     NPAE                  -7.48
  5     AN                    -1.32
  6     AW                   +41.15
  7     HECE                  +7.66
  8     HESE                 -14.52
  9     HACA                  +4.53
 10     HASA                  -3.80
 11     HACA2                 +1.20
 12     HASA2                 +1.18
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.58

Sky RMS =   2.27
Popn SD =   2.31
Clear residual dE versus A and bimodal residuals. Then allowing AN and AW to vary:
       coeff       change     value    sigma

  1     IA                  +216.76
  2     IE         -0.236   -958.72    0.239
  3     CA         +1.030   -382.91    0.200
  4     NPAE                  -7.48
  5     AN         -1.065     -2.38    0.260
  6     AW         +2.241    +43.39    0.247
  7     HECE                  +7.66
  8     HESE                 -14.52
  9     HACA                  +4.53
 10     HASA                  -3.80
 11     HACA2                 +1.20
 12     HASA2                 +1.18
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.58

Sky RMS =   1.27
Popn SD =   1.32
  • 2008-09-06/allsky02/tpoint09-06-2008_225132.dat: Similar to allsky01. Fit with only IE and CA varying:
       coeff       change     value    sigma

  1     IA                  +216.76
  2     IE         +0.000   -954.00    0.187
  3     CA         +0.000   -385.85    0.187
  4     NPAE                  -7.48
  5     AN                    -1.32
  6     AW                   +41.15
  7     HECE                  +7.66
  8     HESE                 -14.52
  9     HACA                  +4.53
 10     HASA                  -3.80
 11     HACA2                 +1.20
 12     HASA2                 +1.18
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.58

Sky RMS =   1.82
Popn SD =   1.84
Clear need for a shift in AN and/or AW (dE versus A residual). Not as extreme a need as was the case for allsky01. Allowing AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.76
  2     IE         -0.005   -954.00    0.127
  3     CA         -0.019   -385.87    0.127
  4     NPAE                  -7.48
  5     AN         -1.291     -2.61    0.149
  6     AW         +0.881    +42.03    0.149
  7     HECE                  +7.66
  8     HESE                 -14.52
  9     HACA                  +4.53
 10     HASA                  -3.80
 11     HACA2                 +1.20
 12     HASA2                 +1.18
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.58

Sky RMS =   1.24
Popn SD =   1.26

  • allsky01/tpoint09-07-2008_005143.dat: Clear need for a shift in AN and/or AW (dE versus A residual). Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -951.45    0.179
  3     CA         +0.000   -381.36    0.179
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.73
Popn SD =   1.75
Allowing AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.096   -951.55    0.130
  3     CA         -0.007   -381.37    0.129
  4     NPAE                  -7.42
  5     AN         -1.362     -2.81    0.156
  6     AW         +0.476    +41.66    0.150
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.25
Popn SD =   1.27

Front-Side Heating (2008/09/08)

  • 2008-09-08/illumination01/tpoint09-08-223547.dat: Very nice result. No need for azimuth axis tilt change:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -956.92    0.116
  3     CA         +0.000   -385.32    0.116
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.12
Popn SD =   1.13
  • illumination01/tpoint09-08-2008_233252.dat: Similar to 223547. Very nice result with no need for a tilt term:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.879   -955.13    0.122
  3     CA         -0.004   -383.86    0.122
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.17
Popn SD =   1.19
* illumination01/tpoint09-09-2008_004017.dat: This run shows a clear tilt (dE versus A). Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.726   -954.40    0.174
  3     CA         +1.499   -382.36    0.174
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.70
Popn SD =   1.71
Allowing AN and AW to float results is a significantly better fit:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.180   -954.58    0.132
  3     CA         -0.055   -382.41    0.131
  4     NPAE                  -7.42
  5     AN         -0.627     -2.08    0.155
  6     AW         -1.176    +40.00    0.152
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.27
Popn SD =   1.30

Back-Side Heating (2008/09/07)

  • allsky02/tpoint09-07-2008_223835.dat: Not so clear a need for an azimuth axis tilt. Fit with only IE and CA allowed to vary:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -962.78    0.128
  3     CA         +0.000   -387.46    0.128
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.24
Popn SD =   1.25
Allowing AN and AW to vary improves things a bit:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.003   -962.78    0.118
  3     CA         -0.022   -387.48    0.117
  4     NPAE                  -7.42
  5     AN         -0.486     -1.94    0.140
  6     AW         +0.316    +41.50    0.139
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.14
Popn SD =   1.16
* allsky03/tpoint09-07-2008_233948.dat: No clear need for AN and AW tilt. Allowing only IE and CA to vary:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE        +10.041   -959.96    0.135
  3     CA         -9.796   -384.80    0.135
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.31
Popn SD =   1.33
Allowing AN and AW to float produces only marginal (0.1 arcsec) improvement.
  • allsky04/tpoint09-08-2008_005518.dat: Clearly foobar data. Appears that refraction correction failed at end of run. DO NOT USE.

Back-Side Heating (2008/09/09)

  • 2008-09-09/illumination01/tpoint09-09-2008_223705.dat: Nice data set. No clear need for a shift in AN and/or AW. Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.619   -962.72    0.121
  3     CA         +0.364   -387.09    0.121
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.18
Popn SD =   1.20
  • 2008-09-09/illumination01/tpoint09-09-2008_233453.dat: Not so clear a need for an azimuth axis tilt. Fit with only IE and CA allowed to vary:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +1.952   -960.77    0.128
  3     CA         +1.147   -385.94    0.128
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.27
Popn SD =   1.28
* 2008-09-09/illumination01/tpoint09-10-2008_005648.dat: See a bit of a need for an azimuth axis tilt. Allowing only IE and CA to vary:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +3.067   -957.70    0.150
  3     CA         +2.056   -383.88    0.150
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.49
Popn SD =   1.50
Allowing AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.127   -957.83    0.131
  3     CA         -0.033   -383.91    0.129
  4     NPAE                  -7.42
  5     AN         +0.158     -1.29    0.155
  6     AW         -0.870    +40.31    0.148
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.28
Popn SD =   1.30

Left-Side Heating (2008/09/11)

  • 2008-09-11/tpoint09-11-2008_225954.dat: AIV pressure sensor foobar, leading to corrupted refraction correction. Fit with added TX term to compensate for foobar refraction. Clear need for azimuth axis tilt correction. Fit with only IE, CA, and TX floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -956.79    0.320
  3     CA         +0.000   -382.23    0.169
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61
 17     TX         +0.000    -20.53    0.204

Sky RMS =   1.81
Popn SD =   1.83
Allowing AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.043   -956.83    0.265
  3     CA         +0.009   -382.22    0.140
  4     NPAE                  -7.42
  5     AN         +0.714     -0.74    0.163
  6     AW         -0.925    +40.25    0.165
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61
 17     TX         -0.024    -20.56    0.169

Sky RMS =   1.49
Popn SD =   1.52
  • 2008-09-11/tpoint09-12-2008_001736.dat: Same as 225954. AIV pressure sensor foobar, leading to corrupted refraction correction. Fit with added TX term to compensate for foobar refraction. Clear need for azimuth axis tilt correction. Fit with only IE, CA, and TX floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -956.07    0.371
  3     CA         +0.000   -380.09    0.196
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61
 17     TX         +0.000    -20.35    0.225

Sky RMS =   1.93
Popn SD =   1.96
Fit with AN and AW allowed to vary:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.179   -956.25    0.335
  3     CA         +0.022   -380.07    0.176
  4     NPAE                  -7.42
  5     AN         +0.063     -1.39    0.206
  6     AW         -1.016    +40.16    0.211
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61
 17     TX         -0.079    -20.43    0.203

Sky RMS =   1.73
Popn SD =   1.78

Left-Side Heating (2008/09/12-13)

  • 2008-09-12/illumination/tpoint09-12-2008_223553.dat: Good data. Clear need for azimuth axis tilt correction. Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.079   -957.84    0.179
  3     CA         +0.040   -381.91    0.179
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.74
Popn SD =   1.76
Allow AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -957.84    0.135
  3     CA         -0.026   -381.93    0.135
  4     NPAE                  -7.42
  5     AN         +0.531     -0.92    0.161
  6     AW         -1.212    +39.97    0.159
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.31
Popn SD =   1.34

  • 2008-09-12/illumination/tpoint09-12-2008_233901.dat: Good data. Clear need for an azimuth axis tilt correction. Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -957.82    0.156
  3     CA         +0.000   -381.27    0.156
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.48
Popn SD =   1.50
Allow AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.006   -957.82    0.133
  3     CA         +0.014   -381.25    0.133
  4     NPAE                  -7.42
  5     AN         +0.453     -1.00    0.158
  6     AW         -0.766    +40.41    0.158
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.26
Popn SD =   1.29

  • 2008-09-13/illumination1/tpoint09-13-2008_003824.dat: Good data. Clear need for an azimuth axis tilt correction. Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE        +12.587   -957.41    0.191
  3     CA         -5.098   -380.10    0.191
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.82
Popn SD =   1.84
Allow AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.029   -957.44    0.159
  3     CA         +0.067   -380.03    0.158
  4     NPAE                  -7.42
  5     AN         +0.694     -0.76    0.188
  6     AW         -0.972    +40.21    0.188
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.50
Popn SD =   1.54

Right-Side Heating (2008/09/13-14)

  • 2008-09-13/illumination2/tpoint09-13-2008_224539.dat: Good data. No clear need for azimuth axis tilt correction. Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         +0.000   -957.14    0.167
  3     CA         -0.000   -387.09    0.167
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.69
Popn SD =   1.71

  • 2008-09-14/illumination1/tpoint09-14-2008_002049.dat: Good data. Clear need for azimuth axis tilt correction. Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.050   -956.04    0.154
  3     CA         -0.007   -384.10    0.154
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.58
Popn SD =   1.60
Allowing AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.102   -956.14    0.142
  3     CA         -0.001   -384.10    0.141
  4     NPAE                  -7.42
  5     AN         -0.335     -1.78    0.166
  6     AW         -0.725    +40.45    0.169
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.44
Popn SD =   1.47

  • 2008-09-14/illumination1/tpoint09-14-2008_014016.dat: Good data. Clear need for azimuth axis tilt correction. Fit with only IE and CA floating:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE        +14.580   -955.42    0.183
  3     CA         -7.151   -382.15    0.183
  4     NPAE                  -7.42
  5     AN                    -1.45
  6     AW                   +41.18
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.83
Popn SD =   1.85
Allowing AN and AW to float:
       coeff       change     value    sigma

  1     IA                  +216.61
  2     IE         -0.203   -955.62    0.150
  3     CA         +0.025   -382.13    0.148
  4     NPAE                  -7.42
  5     AN         -0.792     -2.24    0.176
  6     AW         -1.090    +40.09    0.179
  7     HECE                  +7.57
  8     HESE                 -14.57
  9     HACA                  +4.55
 10     HASA                  -3.76
 11     HACA2                 +1.21
 12     HASA2                 +1.16
 13     HECA2                 +0.82
 14     HESA2                 +1.15
 15     HECA3                 -0.63
 16     HESA3                 -0.61

Sky RMS =   1.47
Popn SD =   1.50

-- JeffMangum - 14 Sep 2008
Topic revision: r4 - 2008-09-14, JeffMangum
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