SUMMARY
Inclinometry was taken during the early morning of 21 May 1999 and a new track model was created and installed.

   Datasets     HST start      mean leg temperatures   Humidity
                               start   middle   end       %
 ( inc990516cw    05:53         2.1     2.3     2.6      45 )  
   inc990521      02:54         1.8     2.2     2.3      20

The difference between the new and old models is shown below :

• The rms scatters in the (F1,F2,F3) differences are (0.48", 0.16", 0.36") - as low as ever seen for two runs 5 days apart.
• The symmetry remains good (see the plot ).
• The new track model was installed at 10:30 HST on 19990521.