Following a water leak, a clockwise only inclinometry run was carried out on the 16th March before observations were to be resumed. This was followed by a spell of bad weather which prevented the opening of the telescope. With an improvement in the forecast a new full (cw+ccw) inclinometry run mas been performed. This is the first full run installed since the removal of SCUBA2 outlined in the last report.

    Datasets     El   Dirn     HST       mean leg temperatures     Humidity
                              start      start   middle   end          %
   (20090316    89     cw    ~18:30       0.5     0.4     0.4          98) 
    20090319    89     cw    ~19:15       3.2     2.8     2.5          97
    20090319    89    ccw    ~22:00       2.5     2.0     1.8          96   

The new data are recorded from the 3 active inclinometers and one of the two strain gauge channels.

• The differences between the (CW) model derived from the new data and data taken on 16th March are shown below:
  Click for larger image

• The resulting rms scatters in the differences in (F1,F2,F3) are (0.57", 0.52", 0.46") c.f. (0.80",0.51", 0.64") between models from 20090316 and 20090227. Differences will arise from the fact that the models installed on both the 27th Feb and 16th March used a averaged cw-ccw profile taken from previous runs.

• The CW-CCW profile is normal, looking similar in profile to those produced before the removal of SCUBA2. It is used to generate a hybrid track model which was installed at ~10:45 (HST) on the 20th March 2009.

• The symmetry and the strain gauge data for the one remaining channel looks as expected.