[CQ-Contest] Work Plan for CQ WW DX

Rick Kiessig kiessig at gmail.com
Fri Oct 17 18:45:06 EDT 2008

REC533, upon which Zoneprop is apparently built, is intended to be used to
estimate long-term averages, not to make short-term predictions.  Using
short-term Kp and running frequent updates doesn't change the nature of the
underlying model.  


Also, there are several different flavors of "sunspot numbers," which
shouldn't be confused with "smoothed sunspot numbers," which the models
require.  Current SSNs are:

NGDC: 6 (only one valid for VOACAP)
IPS: 8

Some (average) FOT charts for different areas of the world that are based on
VOACAP models are available at:


73, Rick ZL2HAM

-----Original Message-----
From: cq-contest-bounces at contesting.com
[mailto:cq-contest-bounces at contesting.com] On Behalf Of VE5ZX
Sent: Saturday, October 18, 2008 3:55 AM
To: Tim Holmes
Cc: CQ Contest
Subject: Re: [CQ-Contest] Work Plan for CQ WW DX

Zoneprop is designed to give a more accurate propagation prediction based on

the ~current~ K index. The FOT matrix is updated once an hour using the 
current K index. It is not designed to be used for future propagation 

CU in the contests

... Sylvan

Sylvan Katz, VE5ZX
Saskatoon, SK

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