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The following is an example from the NOAA site 4 :-<br />
http://www.swpc.noaa.gov/ftpdir/lists/radio/rad.txt<br />
Note the missing data is shown as a -1. This can be due to fact that there is no Sun<br />
visible at the measuring Centre, given the time of year <strong>and</strong> Latitude of the site in<br />
question. Your author has considered the possibility of using the available valid data<br />
from all sites <strong>and</strong> providing a composite average. It could be of use to those outside<br />
Australia who may not have coincident Sun at the time of the Learmonth<br />
measurement. We still require real time measurement data <strong>and</strong> I am currently<br />
negotiating a possible solution.<br />
Doug McArthur <strong>VK3UM</strong> Page 6 GippsTech 2008
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