Re: [APML] Instantaneous rate of field rotation

[steve banbury <banburys@sonic.net>]

Thanks Leon--I'll add it to the back of Covington's book.

Steve

Leon Aslan wrote:

> I have uploaded a screen capture of the Mathcad document and it can be
> viewed here:
>
> http://home.earthlink.net/~laslan/images/field_rotation.jpg
>
> it's about 50K..
>
> If I mis-entered the original expression, please feel free to let me know so
> I can correct it and redo the expression.
> Also a slight note is that the continuation lines for the expression start
> with a period(.) which is mathcad's notation, this is NOT a multiplication,
> but rather an addition or subtraction from the previous line.
>
> Clear skies,
> Leon
>
> Leon Aslan wrote:
>
> > Hello folks,
> > long time follower of the list/archive, first time poster :-)
> >
> > I've been reading Michael Covington book AP for the amateur,
> > specifically Appendix B where he does and excellent job of
> > mathematically describing drift and field rotation. In section B.3.2 he
> > decided to omit the mathematical expression for the instantaneous field
> > rotation and understandably so, as the math gets a little hairy (as we
> > say).. I plugged the expression into Mathcad and solved symbolically for
> > d/dh(delta.rho) and the expression is a bit long but not too difficult
> > to solve numerically. Anyway, if anyone is interested, I will be glad to
> > share the results with fellow AP'ers..
> >
> > Clear skies,
> > Leon Aslan
> >
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