Subject:
palm springs
From:
Simon Walker <walker@acse.shef.ac.uk>
Date:
Tue, 22 Feb 2005 20:08:28 +0000 (GMT)
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pickett@uiowa.edu
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Simon Walker <walker@acse.shef.ac.uk>
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Hi Jolene,

Here are some plots for you. They are currently if
tif format. If you want anything else I can try to
make them. 

overview.tif shows the FGM magnitude and x, y, and z
             components. The shaded region is the period
             for which we have 9kHz sampling EFW probe
             data. I've really only looked at events
             in the first half of this period. The
             other half is 'to be analysed'.
             
ex_n.tif     These are example events. X axis is time.
             Y axis is potential difference between
             the probes in Volts. The top panel shows
             the potentials v13 (probe 1 - probe 3) 
             and v42 (red). These correspond to two
             parallel measurements. The time difference
             determined by shifting one signal enables
             the velocity perp to the probes to be 
             estimated. The lower panel shows the same
             using probe pairs whose separation is perp
             to the first pair.
             
direction.tif Shows the direction of propagation (blue) 
              in the despun coordinate system which is
              almost aligned with GSE (Xdespun~Xgse, 
              Y (Z) despun ~ -Y (-Z) GSE). The green
              lines indicate the shock normal (model and
              timing). The magenta arrow is the CIS
              flow direction taken from the prime parameters.
              I feel almost 100 percent confident with the 
              directions shown in this plot. 
              
I hope that these plots are OK for you. 

Best regards,

    Simon
    
==================================================
Dr. Simon Walker
Dept. of Automatic Control and Systems Engineering
University of Sheffield
Mappin Street             Tel: +44 (0)114 222 5234
Sheffield S1 3JD          Fax: +44 (0)114 222 5661
U.K.               E-mail: simon.walker@shef.ac.uk
==================================================