Hi,

Have read up a bit on propagation, and the Solar Flux values.

But what i haven't been able to get a good feeling for are the numerical
magnitudes, and the
meaning of:

e.g., what value of solar flux value would be considered "good," ? Higher
better ?
A & K values ? Lower better ?
Why ?

How often during the day, typically, are there "meaningful" changes, or is
it a weekly thing ?

etc. ?

A brief explanation of all of this would be most appreciated.

Thanks,
B.

"Robert11" wrote:

Here is a start. http://www.kc4cop.bizland.com/RADIO__A__K_INDICES.HTM


Hi,

Have read up a bit on propagation, and the Solar Flux values.

But what i haven't been able to get a good feeling for are the numerical
magnitudes, and the
meaning of:

e.g., what value of solar flux value would be considered "good," ? Higher
better ?
A & K values ? Lower better ?
Why ?

How often during the day, typically, are there "meaningful" changes, or is
it a weekly thing ?

etc. ?

A brief explanation of all of this would be most appreciated.

Thanks,
B.

e.g., what value of solar flux value would be considered "good," ? Higher
better ?
A & K values ? Lower better ?
Why ?

For A and K values, the lower the number, the better. The values typically
vary with the strength of geomagnetic activity on the Sun's surface.

Generally, propagation conditions are best when the A index is 15 or lower,
and the K index is 3 or lower.

Besides causing auroral activity, high geomagnetic field conditions can
affect the electrons in the ionosphere, reducing the maximum usable
frequency (MUF).

Hope that helps?

Jackie

Hi,

Thanks for info and links.

What about the SF numnber ?
What's a good value ? Higher the better ?

Bob

--------------------------------
"Robert11" wrote in message
...
Hi,

Have read up a bit on propagation, and the Solar Flux values.

But what i haven't been able to get a good feeling for are the numerical
magnitudes, and the
meaning of:

e.g., what value of solar flux value would be considered "good," ? Higher
better ?
A & K values ? Lower better ?
Why ?

How often during the day, typically, are there "meaningful" changes, or is
it a weekly thing ?

etc. ?

A brief explanation of all of this would be most appreciated.

Thanks,
B.