VU2NSB in India
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S9 @ 7 kM with 100W (4.35 miles)
30 dB. additional path loss
S4 @ 35 kM with 100W (21.75 miles)
18 dB. additional path loss
S1 @ 80 kM with 100W (49.70 miles)
@ this point if we increase radiated power
to 1 kW. to overcome an additional 10 dB.
of path loss that puts the signal in just
beyond the 100 kM. mark or 62.10 miles.
as this relates to R-REC-P.368-7-199203
and R-REC-P.368-8-200503 it's interesting
to note that the worst case scenarios
presented in these documents came in @
115 kM, or 71.40 miles. @ 1kW radiated
power over 3 soil types: very dry ground
and two different versions of fresh water ice.
on the whole, distances over the remaining
8 soil types were far greater than these 3
soil types, ranging from 130 - 180 kM. over
the 5 land soil types and three water types,
in one instance extending to 360 kM. over
a salt water path with average salinity.
https://vu2nsb.com/radio-propagation/ground-wave-propagation/surface-wave-propagation/
