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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.

  • 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.

Contact: Iain Coulson. Updated: Fri Oct 27 12:59:31 HST 2006

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