On UT 20070702, the HARP collimations in /jac_sw/itsroot/src/harpb/XML/instrument_harpb.ent were
CA_default=18.0, IE_default=28.0
HARP pointing data that night are shown below:

JCMT Pointing Test - 2007/07/01
: ALTAZ
+19 49 33.03  2007 07 02     6.25  627.90   4111.00   0.034   866.963
09 48 21.333 +13 14 44.56  09 48 28.369 +13 10 10.76   14 10.70519   92.680   10.557 HARPB    0.00    0.00   -6.2   -3.9
09 48 21.333 +13 14 44.56  09 48 29.052 +13 10 09.81   14 26.67212   95.865   13.054 HARPB    0.00    0.00   -3.4   -7.0
18 23 04.661 -27 06 22.28  18 23 13.582 -27 01 43.55   14 50.50888   95.865    8.926 HARPB    0.00    0.00   -5.1   -5.9
18 23 04.662 -27 06 22.29  18 23 20.462 -27 04 24.14   16 37.75338   95.760   32.315 HARPB    0.00    0.00   -4.3   -8.8
18 23 04.663 -27 06 22.29  18 23 21.139 -27 05 40.14   17 26.58254   95.760   41.120 HARPB    0.00    0.00   -1.8   -7.7
18 23 04.665 -27 06 22.30  18 23 19.477 -27 08 56.24   20 19.06517   95.760   30.545 HARPB    0.00    0.00   -2.5   -6.1
18 23 04.665 -27 06 22.30  18 23 19.528 -27 09 25.57   21  0.62198   95.760   21.193 HARPB    0.00    0.00   -2.3   -7.3
21 02 37.996 +36 43 15.36  21 02 26.679 +36 44 41.42   21 15.84437   92.680  114.468 HARPB    0.00    0.00   -0.6   -2.0
21 02 37.997 +36 43 15.36  21 02 25.647 +36 44 05.17   21 35.67769  102.965  110.975 HARPB    0.00    0.00    0.7   -1.5
21 02 37.997 +36 43 15.37  21 02 24.319 +36 42 38.63   22 15.98776  102.965   97.618 HARPB    0.00    0.00   -1.5   -2.2
21 02 37.999 +36 43 15.38  21 02 29.277 +36 40 20.28   23 38.57159  102.965   58.685 HARPB    0.00    0.00   -2.3   -2.2
21 02 38.000 +36 43 15.40  21 02 38.887 +36 38 56.11   01 13.15987  102.965   20.148 HARPB    0.00    0.00    0.4   -4.1
21 02 38.001 +36 43 15.41  21 02 40.153 +36 38 48.10   01 28.29537  103.280   21.249 HARPB    0.00    0.00    0.0   -4.4
20 46 43.715 +40 08 29.39  20 46 48.180 +40 03 51.90   01 33.46113  103.280   15.599 HARPB    0.00    0.00   -1.5   -3.4
20 46 43.715 +40 08 29.39  20 46 50.211 +40 03 51.71   01 48.50721  103.280   11.891 HARPB    0.00    0.00    1.8   -5.2
20 46 43.715 +40 08 29.39  20 46 51.054 +40 03 51.54   01 53.30531  103.280   10.879 HARPB    0.00    0.00    2.0   -3.9

The residuals (uaz,uel) in the last two columns have means & rms's of
(uaz,uel) = (-1.66"+2.28", -4.73"+2.16"). Running these data through TPOINT

• fix
• use IE CA
• fit

gives

       coeff       change     value    sigma

  1     IA                  -255.20
  2     IE        +32.553    +12.83    0.782
  3     NPAE                 +54.43
  4     CA        +16.339   -172.63    0.782
  5     AN                    +9.00
  6     AW                   -15.38
  7     TF                    -9.76
  8     AUX1S                 +1.00
  9     AUX2E                 +1.00

Sky RMS =   3.13
Popn SD =   3.34

from which we can see that the new suggested values for CA, IE are:

• CA = CA_default + uaz
• IE = IE_default - uel

The residuals of the TPOINT fitting process are given below:

* slist
          *HA           *Dec      *Az   *ZD     dX     dD     dS     dZ     dR

   1  +04 22 16.33  +13 15 03.7  275.1  62.8   -1.9   -4.1    4.5   -0.7    4.6
   2  +04 38 13.51  +13 15 07.7  276.3  66.6    1.7   -2.3    1.7    2.3    2.9
   3  -03 32 28.32  -27 05 24.4  130.6  69.6   -3.1    2.0    3.4    1.3    3.7
   4  -01 45 17.58  -27 05 40.6  150.5  53.4   -4.5   -2.3    2.7    4.3    5.0
   5  -00 56 28.79  -27 05 42.7  163.2  48.9   -1.0   -2.8    0.1    3.0    3.0
   6  +01 55 57.09  -27 05 40.0  211.9  54.7    0.1   -1.6    0.8    1.4    1.6
   7  +02 37 29.36  -27 05 35.9  220.5  60.5    0.9   -1.9    0.6    2.0    2.1
   8  +00 13 12.47  +36 43 04.4  351.0  17.1   -1.5   -2.5   -1.1   -2.7    2.9
   9  +00 33 02.21  +36 43 04.5  338.6  18.4   -3.5   -1.9   -2.3   -3.2    3.9
  10  +01 13 20.27  +36 43 05.1  320.4  23.3   -1.9   -1.5   -0.1   -2.5    2.5
  11  +02 35 54.02  +36 43 07.9  304.9  37.9   -2.2   -1.3    0.7   -2.5    2.6
  12  +04 10 27.01  +36 43 16.4  301.6  56.7   -0.8    2.1   -2.0   -0.8    2.2
  13  +04 25 34.57  +36 43 18.9  301.7  59.7   -0.1    1.7   -1.7   -0.1    1.7
  14  +04 46 37.62  +40 08 35.1  305.9  63.6   -1.3    0.3   -0.2   -1.3    1.3
  15  +05 01 39.55  +40 08 39.2  306.2  66.4    0.8    3.4   -3.4    0.4    3.5
  16  +05 06 27.13  +40 08 40.7  306.3  67.3   -0.4    3.7   -3.7   -0.9    3.8
                                                dX     dD     dS     dZ     dR
                                        RMS     2.01   2.40   2.27   2.15   3.13

from which we see the agreement in the rms's with the values quoted above, as well as the relationships between dS and uaz, and dZ and uel:

• dS = - uaz + uaz
• dZ = - uel + uel