[NLRS] Path loss calculations

[W0ZQ@aol.com]

In a message dated 3/4/2004 6:43:41 PM Central Standard Time, wb0ljc@juno.com 
writes:
1) FSPL = 36.6 + 20 Log (Frequency in MHz) + 20 Log (distance in Miles)
        the result is in dB. FSPL is free space path loss.

This the only equation that I wonder about.   There may be two problems with 
it.   One is that this is the free path loss for two stations who can see each 
other while a tropo contact is based on the fact that two stations can see a 
common scattering volume in the troposphere but the scattering loss needs to 
be accounted for.   The second is the 20 Log (freq) part .... I think it must 
take into consideration a standard antenna on all frequencies like perhaps a 
dipole or something.       

It would be good to find an equation that defines troposcatter path loss.

73, Jon
W0ZQ


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