[aprssig] 30M APRS and digipeaters... (aliases)
Stephen H. Smith
wa8lmf2 at aol.com
Thu Jul 12 20:19:50 CDT 2012
On 7/12/2012 9:02 PM, Bob Bruninga wrote:
> Now if someone with in-depth HF propagation smarts and experience wanted to designate a system of LINKED path of specific digipaters, where they are spaced such that each one only hears its two adjacent neighbors and has a low probablity of hearing the hop beyond, then I would not object to experimenting with such a linear path system.
> I think the HF experts could reasonably answer the question as follows:
> WHAT is the optimum distance X for a 30m reliable QSO. Then what is the distance Y which seems to be nearly impossible. Then hopefully X is something similar to 1/2 of Y and space the digipeaters accordingly.
The intractable problem is that THERE IS NO SINGLE OPTIMUM DISTANCE. For any
given location, the optimum distance is constantly changing, hour-by-hour,
day-to-night, the season of the year, the position in the 11-year solar cycle,
and randomly when solar flares explode.
Speaking of flares, we got popped by a BIG one earlier today. Check out the
NOAA/NASA X-Ray flux chart on my website at:
Take a look before it scrolls off the three-day chart.
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