hi all !
Thanks much for all the responses.
The easiest to comprehend graphics i found are here :
http://www.swpc.noaa.gov/SWN/
It has a three picture window called "ACE real time solar wind pages"
The one on the left shows the Inklination of the interplanetary mag
field (which is generated by the solar wind ) against the earths own mag
field.
Whenever both are similarly polarized,, even slow winds ( up to 400
km/sec ) can trash MF prop. When strong solar winds prevail,
polarization is no longer important.
That seems to be the common conception.
73 de wolf
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Topband Reflector
