SUMMARY
CW Inclinometry was taken during the day 26 Jul 1999, and changes since the last run on 11 June are relatively minor.

We can seemingly allow this sort of interval to elapse now without seriously jeopardizing the accuracy of the track model. There has been concern that the model would become quickly outdated since weekly inclinometry has been temporarily abandoned in order to spare the 2 active carousel drive motors from such stress. They survived today's run well enough, and may be spared carry this particular load again until the 3rd drive is reinstated - at the beginning of October. On today's showing, however, it may be possible to do monthly inclinometry to bridge that period.

   Datasets     HST start      mean leg temperatures   Humidity
                               start   middle   end       %
 ( inc990611 cw   09:45         3.0     4.2     5.5      35 )
   inc990726 cw   11:30         2.8     3.8     4.6      50 

The differences between these clockwise models is shown below :

• A spike at azimuth 380 was caused by someone walking on the antenna. It has been suppressed in the production of the installed model.

• The F1 difference range is +/-2", and the differences in (F1,F2,F3) have rms scatters of (0.92", 0.42", 0.65"), but these are not bad considering the interval.

• A new track model was installed at 16:15 HST on 19990726.

Symmetry
The symmetry remains good : see the plot .