Topband: Propagation

[Thomas F. Giella NZ4O]

I have found that the 160 meter propagation forecast produced by 
VOACAP/VOAPROP is pretty accurate out to approximately 4000 miles.

Having said that Carl K9LA is correct in that there is no accurate 
propagation prediction software for 160 meters, especially on the really 
long paths. All propagation prediction software operates from the principle 
of propagation conditions versus the MUF/OWF. For 160 meters earth's 
magnetic field plays a very large role and propagation software does not 
take this into account.

However if you understand how and where the geomagnetic field affects 160 
meter propagation then accurate forecasting is possible. In part I base my 
MF radiowave propagation forecast section of my weekly LF/MF/HF/6M radiowave 
propagation forecast at http://www.solarcycle24.org on this principle.

73 & GUD DX,
Thomas F. Giella, NZ4O
Lakeland, FL, USA
nz4o at tampabay.rr.com

NZ4O Amateur & SWL Autobiography: http://www.nz4o.org
NZ4O Daily LF/MF/HF/6M Radiowave Propagation Forecast: 
http://www.solarcycle24.org