Topband: Solar wind

[Greg - ZL3IX]

Ilmo Anttila wrote:
> Topbanders
>
> I do follow solar wind and dynamic pressure readings daily. To my opinion both of them indicate very well propagation on topband even better than A and K indexes.
> Good rule of thumb is, if solar wind speed is less than 300km/s and dynamic pressure less than 0,5 nPa it is expected very good conditions to JA, NA and even direct over North Pole here in South Finland above 60 degrees North.
>
> 73
>
> Ilmo, OH2BO
>   
That's an interesting observation Ilmo.  Can you tell me where the 
dynamic pressure can be seen?  The visi site gives speed and density in 
particles/cc (http://www.visi.com/~brainiac/solar/)  Alternatively do 
you know how to convert between density and dynamic pressure?

73, Greg, ZL3IX