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20061018 report
CW/CCW inclinometry following earthquake
Inclinometry was done as follows:
Datasets El Dirn HST mean leg temperatures Humidity
start start middle end %
( 20061010 89 cw ~03:10 6.9 6.9 7.0
20061010 89 ccw ~05:30 7.0 7.1 7.2 )
20061017 89 cw 23:16 - - -
20061018 89 ccw 03:21 - - -
Data is recorded from the 3 active inclinometers only:
there is no strain gauge data, for instance.
Engarchive has been unavailable since the earthquake
on 20061015 - so no leg temperatures.
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The differences between the (CW) model derived from these new data
and the previous model of 10 Oct
are shown below :
Small but significant changes in the track profile
are detected. If this is a simple tilt of the
plane of the track it amounts to about 40microns
in the NE-SW direction. The impact upon pointing (and the pointing model)
must await better weather than we have right now).
The CW-CCW differences from the new data are shown here:
The F1 difference between CW and CCW runs seems similar in
amplitude to that seen
previously.
A
hybrid track model was created using just the new CW-CCW profile
and was installed at HST 11:00 on 19 Oct 2006.
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