DV17 Pointing System Issues and Tracking


TIP Last Update: JeffMangum - 22 September 2011

Issues Tracked

  • VERTEX-620: NA Antenna Antenna Acceptance Tests -- Antenna 9017 (DV17) Acceptance Tests -- Pointing
    • Acceptance testing.

-- JeffMangum - 2011-09-22

Test Matrix Progress Tracking

Tracking Performance

(todo - todo done - done )

 +
State Item Comment  
15 Minute Tracking Test
 
  
  

All-Sky Pointing

(todo - todo done - done )

 +
State Item Comment  
Day 1
Completed 2011-09-22
  +  
Day 2
Completed 2011-09-23
  +  
Day 3
Completed 2011-09-24
  +  
Day 4
Completed 2011-09-25
  +  
Day 5
Completed 2011-09-26
  +  
Day 6
Completed 2011-09-27
  +  
Day 7
Completed 2011-09-28
  +  
Day 8
Completed 2011-09-29
  +  
Day 9
Completed 2011-09-30
  +  
Day 10
Completed 2011-10-01
  +  
Day 11
Completed 2011-10-02
  +  
Day 12
Completed 2011-10-03
  +  
Day 13
Completed 2011-10-04
  +  
Day 14
Completed 2011-10-05
  
  

Offset Pointing

(todo - todo done - done )

 +
State Item Comment  
(Az,El) = (0,30)
Completed 2011-09-30 at (358,31)
  +  
(Az,El) = (0,45)
Completed 2011-10-01 at (342,45)
  +  
(Az,El) = (0,60)
Completed 2011-09-30 at (350,58)
  +  
(Az,El) = (0,75)
Completed 2011-10-01 at (340,72)
Attempted again 2011-10-07 at (26,72); El drift +-0.5 arcsec; Star 1 offset +1 arcsec in Az
  +  
(Az,El) = (60,30)
Attempted 2011-09-30 at (32,30); Star #2 offset in Az +3 arcsec from other two (not clear why) .
Completed 2011-10-01 at (63,30)
  +  
(Az,El) = (60,45)
Attempted 2011-10-01 at (70,52); First 5 measurements offset in Az and 3 extreme Az outliers.
Attempted again 2011-10-02 at (67,49); Star 1 offset -1 arcsec in Az; May be alternating amoungst three stars in group.
Attempted again 2011-10-02 at (64,52); Star offsets alternating between two Az offsets +-1 arcsec.
Attempted again 2011-10-03 at (68,52); El drift +-0.5 arcsec; Az drift first 4 measurements.
Attempted again 2011-10-05 at (73,52); One star totally not observed due to Az overshoot.
Attempted again 2011-10-07 at (75,45); Star 1 offset in Az -1 arcsec.
Attempted again 2011-10-07 at (73,46); Star 1 offset in Az -1 arcsec.
Attempted 2011-10-07 at (74,45); Only two stars acquired (one star missed due to servo).
Attempted again 2011-10-07 at (72,48); Only two stars acquired (one star missed due to servo).
Attempted again 2011-10-07 at (72,50);
==> Az encoder tower problem fixed <==
Completed 2011-10-08 at (76,43)
Completed again 2011-10-08 at (74,46)
  +  
(Az,El) = (60,60)
Attempted 2011-10-01 at (63,57); Star 1 offset +2 arcsec in Az.
Attempted again 2011-10-02 at (62,59); Star 2 offset +1 arcsec in Az.
Attempted again 2011-10-02 at (57,61); Star 3 offset +1 arcsec in Az.
Attempted again 2011-10-03 at (52,64); El drift +-1.0 arcsec; Star 3 offset +1 arcsec in Az.
Attempted again 2011-10-03 at (48,66); El drift +-0.5 arcsec; Star 3 offset +1 arcsec in Az.
Completed 2011-10-04 at (76,51)
Attempted again 2011-10-05 at (67,58); One star totally missed due to Az overshoot.
Completed 2011-10-06 at (31,60)
  +  
(Az,El) = (60,75)
Completed 2011-10-01 at (40,70).
Attempted again 2011-10-03 at (35,70); El drift +-0.75 arcsec; Star 2 offset -1 arcsec in Az.
  +  
(Az,El) = (120,30)
Completed 2011-09-30 at (115,36)
  +  
(Az,El) = (120,45)
Completed 2011-09-30 at (115,40)
  +  
(Az,El) = (120,60)
Completed 2011-09-30 at (120,60)
  +  
(Az,El) = (120,75)
Completed 2011-09-28 at (129,70)
  +  
(Az,El) = (180,30)
Completed 2011-10-04 at (200,36)
Attempted 2011-10-05 at (188,27); El drift +-0.5 arcsec
  +  
(Az,El) = (180,45)
Completed 2011-10-05 at (207,40)
  +  
(Az,El) = (180,60)
Completed 2011-10-05 at (167,66)
Completed again 2011-10-05 at (180,67)
  +  
(Az,El) = (180,75)
Attempted 2011-10-02 at (178,80); El drift +-0.5 arcsec.
completed 2011-10-02 at (180,68)
  +  
(Az,El) = (240,30)
Completed 2011-09-29 at (243,33)
  +  
(Az,El) = (240,45)
Completed 2011-09-29 at (244,40)
Completed again 2011-09-29 at (244,40)
  +  
(Az,El) = (240,60)
Attempted 2011-10-02 at (250,56); Star 3 offset +1 arcsec in Az.
Attempted again 2011-10-03 at (239,56); El drift +-0.5 arcsec; Star 2 offset -1 arcsec in Az.
Completed 2011-10-06 at (250,58)
Completed again 2011-10-06 at (250,55)
  +  
(Az,El) = (240,75)
Completed 2011-10-06 at (246,67)
  +  
(Az,El) = (300,30)
Completed 2011-09-29 at (295,27)
Completed again 2011-09-29 at (295,25)
  +  
(Az,El) = (300,45)
Completed 2011-09-29 at (314,45)
Completed again 2011-09-29 at (310,45)
  +  
(Az,El) = (300,60)
Completed 2011-09-28 at (307,64)
  +  
(Az,El) = (300,75)
Completed 2011-09-28 at (315,67)
  
  

-- JeffMangum - 2011-01-05

Pointing Model Coefficients

All units arcsec.

Date Pad IASorted ascending IE CA NPAE AN AW HECE HESE
22 September 2011
SEF1
477.12
-685.66
-44.38
-31.93
-9.30
+62.11
-8.69
-47.14

Date Pad HACA HASA HACA2 HASA2 HECA2 HESA2 HECA3 HESA3 HACA3 HASA3
22 September 2011
SEF1
+0.13
+1.28
-1.07
-0.50
-1.01
-0.85
-0.42
-0.64
-0.08
-0.31

-- JeffMangum - 2011-09-22
Topic revision: r17 - 2011-10-10, JeffMangum
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