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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):
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model1-021008-021005
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model1-021008_cw-021009_ccw
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model1-021017-021005
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model1-021019-021005
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There are no signs of 'spikes'.
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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.
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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.
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Updates have been made to the plots of
symmetry
and
strain gauge data
and all looks OK.
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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
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