[mmaimcal]From Mark: shadowing and beam elongation

[Mark Holdaway]

Concerning these plots:  I just realized that
there is a bug in my software which calculates the elevation
incorrectly for determining sub-elevation points.  I am pretty
sure the shadowing and elongation are correct, but we are missing
places where the data is not really sub-elevation.

So:  these plots are with a grain of salt at this point.

	-Mark

> I've made some plots that may be instructive to study:
> 
> For Boone, Conway (ie, Kogan), and Webster style compact
> configurations, I've calculated the sensitivity left after
> shadowing (ie, 1.0 = all sensitivity, 0.192 = LOTS of shadowing)
> as a function of Hour Angle and Declination.  The shadowing is
> instantaneous, ie, for a snapshot at that HA.  (I accidentally
> missed HA=-1.5, which explains the ugly line I've got there.)
> Sub-elevation points are blank.
> 
> 
> Also, I've calculated the beam elongation for these arrays,
> except that the beam elongation is cumulative, ie, the HA=2
> point is the beam elongation (Bmaj/Bmin) for a -2 to +2 hour
> track.  If lots of shadowing occurs, for example, beyond 2 hours,
> the elongation will not change very much at 3 and 4 hours.
> 
> Mosaic image quality is in the pipeline.
> 
> While the CDR is pushing us towards the Kogan array, seeing the
> strengths and weeknesses of all three arrays in comparison should
> be helpfull in improving and finalizing the Kogan design.
> 
> 	-Mark
> 
> The plots are too big for the email and Jeff is moderator and in France.
> So I will hyperlink these to the agenda, which may get out in time for
> the meeting at 3:30 at the new phone number.
> 
>  -Al
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