(11-04-2021, 07:57 PM)EA3GCV Wrote: Hi Erik,
Solar flux, A and K indexes are read from this site:
https://services.swpc.noaa.gov/text/wwv.txt
SSN from:
ftp://ftp.swpc.noaa.gov/pub/indices/DSD.txt
I guess these are general values used all over the world not specific for certain locations. I don't know whether these values can be read from a particular location or not. If you know a web site giving that info for a particular location please let me know. I would need to check if I can implement this automatically by reading the QTH locator of the selected My QTH and calculate this automatically. It will depend on how this site is designed to retrieve this info automatically. Maybe it's not possible to do this.
Best 73
Hi Jordi
I do not think it is possible. Different data comes from different observatories and I think the difference between Swisslog and the Solar Data app is the time period over which the Ap index is averaged. You would think that would be standardised from noaa.gov but clearly not. Since this afternoon it has dropped to 5 as measured in the UK over the last 3 hours, the solar data app still says 6 and Swisslog still says 4 - which is more likely to be correct because the K index has been steady at 1 for the last 9 hours. I doubt that there will ever be a large gap between them.
So don't worry about it - I was just curious as to why the difference existed. I think I have now found out the reason. The main thing is that the data is now readily available in Swisslog which is excellent.
73 de Erik.
