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20020814 report

CW Inclinometry again 'normal', CCW work done too.


Inclinometry was done as follows :

    Datasets  El Dirn     HST     mean leg temperatures   Humidity
                          start     start   middle   end       %
  ( 20020801    90 cw     17:00      9.1      9.9   10.0      40 
    20020812    90 cw     06:50      6.1      6.5    7.1      40 )
    20020814    90 cw     03:40      8.0      7.9    7.8      85
    20020814    90 ccw    06:30      7.8      7.7    7.9      75

The temperature data from the fixed TMU inclinometer are once again OK - so the new data were processed into track models using the usual temperature correction algorithms. The resulting models are compared with each other and with previous models below :

020814cw-020801
020814cw-020812
020814cw-020814_ccw

  • The 'spikes' seen in the data of 12 Aug have disappeared, and the new CW data are comparable with those of 01 Aug :

  • The formal differences in (F1,F2,F3) are described by the rms scatters of (0.62", 0.33", 0.39") c.f. (1.08", 0.40", 0.33") previously.

  • The CW-CCW difference compares favourably with previous measures.

  • Updates have been made to the plots of symmetry and strain gauge data. The CW data show a return towards normal values, although it is interesting to note that the CCW strain values are lower than their CW counterparts, as was seen (though not reported) in the last CW/CCW pair taken 09 May.

  • The prevailing temperature for the new data is higher than the normal operating temperature, but still lower than that for the data of 01 Aug, so the new CW model is preferred. The new model was installed at 10:00 HST 15 Aug 2002.


Iain Coulson
Latest Update : 15 Aug 2002
Contact: Iain Coulson. Updated: Sat Nov 6 18:00:25 HST 2004

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