A full cw/ccw inclinometry run was performed on May 25th. The followed hard on the heels of the previous run on the 19th but this was deemed necessary to check the settling motion of the telescope in its new position.

    Datasets    El   Dirn      HST       mean leg temperatures    Humidity
                              start      start   middle   end        %
   (20090519    89     cw     14:45       5.5     6.3     7.2        22     
    20090519    89    ccw     18:00       7.2     8.0     7.4        10)
    20090525    89     cw     12:45       7.3     8.0     8.5        45
    20090525    89    ccw     15:30       8.5     8.9     9.0        65

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 this run and the previous run (19th May) are shown below.
  Click for larger image

• The resulting rms scatters in the differences in (F1,F2,F3) for the left hand plot are (0.31", 0.22", 0.94"). The slightly high value for F3 comes from the removal of the spike at az ~10° seen in the 20090520 model. These values are compared to (2.24", 1.31", 0.82") for the difference between this model and the 'spikey' one on the 15th.

• The CW-CCW profile is normal, and is used to generate a hybrid track model which was installed on the 25th May at ~17:30.

  
  Strain Data
  Following the trend of falling loads on the all the wheels leading to wheel 4 lifting off the track a closer eye is being kept on the strain data and inclinometry will now be performed once a week instead of bi-weekly. The loads remain relatively stable following the central bearing adjustment (see strain gauge data) but this must be monitored regularly.