187Re: [dxatlas] 90-day SSN data for HamCAP
- Apr 9, 2005
> Yet the average montthly sunspots for the past 3 months are:I am not sure how monthly values presented on that page are calculated.
> 2005 01 31.3
> 2005 02 29.1
> 2005 03 24.8
> Average = 28.4, which is very close to the built-in 30 and current
> NOAA predicted 28.5.
> How can IonoProbe's computed 90-day SSN possibly be 47? This is
> different by nearly a factor of two!
IonoProbe just averages the last 90 daily values from
> Could IonoProbe's calculation be off by one year? I notice 47 is veryIonoProbe does not have access to the data from the last year.
> close to the SSN numbers for this time last year:
> 2004 52.0 49.3 47.1 45.6 43.9 41.7 40.2 39.2 37.5
> And the average of 49.3, 47.1, and 45.6 is 47.3. Maybe the logic of
> the calculation has an error somewhere in its data collection.
> Definitely so. The current 90 day average (1 Jan 05 - 31 Mar 05) isThese are the RI indices, not daily SSN values.
> 28.4 using this data:
> Anyhow, now IYou may want to enter the latest NOAA forecasts in the SSN.dat file using
> know what to use and will probably just go with the NOAA forecast
> which seems to be fairly accurate at this stage of the cycle.
Notepad, then HamCap will use these data automatically.
73 Alex VE3NEA
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