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20021022 report

Further CW & CCW Inclinometry, OK


Inclinometry was done as follows :

    Datasets  El Dirn     HST     mean leg temperatures   Humidity
                          start     start   middle   end       %
  ( 20021005  90  cw      02:15      0.0      0.3    0.7     100 )
    20021008  90  cw      22:02      5.1      5.0    4.9      30
    20021009  90 ccw      01:30      5.0      5.1    5.2      30
    20021017  90  cw      22:11      6.4      6.1    5.8      95
    20021019  90  cw      18:06      6.6      6.2    5.7      95

The temperature data from the fixed TMU inclinometer has come good again, so the new data are temperature-corrected during the processing. The resulting CCW models were compared with the previous model (of Oct 05) and the CW & CCW models of 08/09 Oct are also compared (click on images for better view):

model1-021008-021005
model1-021008_cw-021009_ccw


model1-021017-021005
model1-021019-021005
  • There are no signs of 'spikes'.

  • The differences between the CW data and the current CW model of 05 Oct are small, and the temperatures prevailing sufficiently warmer than expected normal operating temperatures that the 'cool' data of 05 Oct are still considered most applicable. No model update is contemplated, but the data at least show that no significant changes have occurred in the track profile since then.

  • The formal differences in (F1,F2,F3) for the first of these differences are described by the rms scatters of (0.36", 0.17", 0.38") c.f. (0.45", 0.26", 0.59") previously.

  • Updates have been made to the plots of symmetry and strain gauge data and all looks OK.

  • The CW-CCW data look very comparable to similar differences seen previously - most recently on 14 Aug. The difference between these differences (phew !) is shown below :

    The rms scatters in (F1,F2,F3) are (0.36", 0.09", 0.39"), which is very similar to typical CW-to-CW differences.


Iain Coulson
Latest Update : 22 Oct 2002
Contact: Iain Coulson. Updated: Sat Nov 6 18:00:25 HST 2004

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