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Pointing
20040607 report

Relative collimations RxB -to- RxW


The following pointings were performed with receivers B and W_C :

*        6-JUN-2004 16 11 18.31
   az     el       uaz    uel  hh mm ss.s source           Rx
  ------  -----   ----  -----  ---------- -----------      --
  284.18  38.57   -0.7   -6.9  16 11 18.3 VENUS            RXB
  284.04  40.92   -2.4  -18.9  18 15 11.4 MARS             RXW
  262.58  59.18    0.8  -20.6  19 12 15.3 IRC+10216        RXW
  298.30  62.23    1.9  -18.6  19 28 09.7 CIT6             RXW
  265.88  37.35   -1.3  -16.3  21 41 11.4 JUPITER          RXW
  145.70  37.19    1.2  -14.9  21 52 08.2 16293-2422       RXW
  156.70  42.07    5.0  -14.2  22 34 59.3 16293-2422       RXW
  157.35  42.28    4.1  -14.5  22 37 17.4 16293-2422       RXW
  165.99  44.43    3.9    3.3  23 06 26.4 16293-2422       RXB
  108.24  43.79   -0.4    1.3  23 17 50.4 G34.3            RXB
  124.18  59.31   -0.3    2.5  00 30 52.4 G34.3            RXB
  162.76  70.63    0.6    4.3  01 48 05.3 G34.3            RXB
  130.54  47.02    0.0    5.4  03 45 11.2 URANUS           RXB
  175.04  53.74    1.1    4.0  04 15 32.4 NEPTUNE          RXB
  199.66  51.83    0.4    3.0  05 17 37.4 NEPTUNE          RXB
  222.47  42.62   -1.4    0.8  06 32 06.4 NEPTUNE          RXB
  205.47  57.57    2.0    3.3  06 45 41.4 URANUS           RXB
  311.48  45.92   -0.7    2.3  06 55 20.2 W75N             RXB
  184.56  73.63    3.8    4.5  07 08 01.5 TXPSC            RXB
  225.03  67.65    3.4    1.0  08 05 14.2 TXPSC            RXB
  243.97  32.12   -2.6   -4.7  09 13 22.2 URANUS           RXB
  247.24  27.16   -2.3  -16.7  09 36 34.2 URANUS           RXW
  248.84  24.38   -3.3   -4.4  09 49 13.4 URANUS           RXB

Consecutive pointings with B & W give relative pointings, in the sense B->W, of

  • (-1.7",-12.0") from Venus and Mars at the 'start'
  • (+0.2",-11.2") on 16293-2422 at ~23:00 HST, and
  • (+0.7", -12.2") from the B-W-B sequence on Uranus at the end.
Giving most weight to the last set we adopt (+0.5", -12.0") as (round) working values. 16 RxB pointing data from UT20040608 give mean values of (uaz,uel) of (0.1+2.5", 1.2+1.3"), allowing the collimations for RxB and RxW to be adjusted so as to yield future offsets of (0,0) for each.


Iain Coulson
Latest Update : 08 Jun 2004
Contact: Iain Coulson. Updated: Sat Nov 6 18:00:27 HST 2004

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