f6irf's blog

Attached is a screen picture, showing K7EK signal received in my QTH on 40m.
It is not obvious on the WSPR screen, but on spectrum lab it was difficult to recognize a WSPR signal, as it was completly frequency spread out.
Of course no Decode...
Strongly suspect the effects of polar-flutter...

The attached graph shows the graphical 40m path analysis for the stations ZL2TLD (RE79tb) and F6IRF (JN35au) for the period Sept28 to Oct09 2008. The path is roughly 19000 kms for the short path and 21000 kms for the long path. (.../...)

Bruce,
It would find quite useful if you could insert somewhere on the page a small window showing the real-time solar data.
There is a sophisticated example on ON4KST 6m page. Don't think we need that level of sophistication, but just:
- Solar Flux
- SSN
- Kp
- Ap
- SSNe (Effective SSN, derived from Ionosonders measurements - The SSNe may take a negative value. This is the case at the moment while the SSN is 0 for several months, thus not vy useful to estimate the day to day condx...)

Starting tomorrow at 0z is the CQWW RTTY. Of course it won't affect 30m users, but 80, 40 and 20m are going to be full from edge to edge (and even outside the dedicated digital segments).
Rather than complaining about it (I am a contester myself !), I think it is a nice opportunity to focus on bands where the activity remains low or quasi inexistant: 17m during daytime and 160m at night.

I have been asked how do I make the spot plots, which appear on http//f6irf.blogspot.com/
Below are a few tips (probably there are other ways to do it - so it is just one method):
1- Filter the data of interest (by band/callsigns/etc) from the spots page and copy it (ctrl-A, ctrl-C)
2- Open Wordpad and "paste special", "Unformated text", then "save as" .txt
3- Open the txt file with excel using "space" as separator
Now the rest is just Excel data manipulation - the purpose is not to give you an excel course or to rewrite the best seller "excel for the dummies", but just a few tips

As already mentionned,the current WSPR recommended frequency is far from being ideal for WSPR users located in Europe.
A certain number of Region 1 countries still has 7.100 as upper band limit, therefore 7076 is in the middle of the SSB segment, which makes the frequency unusable (at least on RX), especialy in the evening and early morning (when the SSB activity is maximal and the conditions still favorable for continental distances). This almost forbid the band to be used for tests with AS and OC both at short path (EU-evening) and at long path (EU-morning).

Along the past few days, I have published on my blog several examples of what could be done with the enormous data that is available from the WSPR database.
Among the examples: Receiving antenna evaluation, Station performance evaluation, comparison of 2 transmitting antennas, comparisons betwen VOACAP predicted SNR's and real reports, etc...
It may give you ideas... In the mean time, I would appreciate your comments, suggestions and ideas...
The data is available to everybody: a gold mine !

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