Probability of corrupted spots

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Joined: 2009/06/08 - 21:30
Probability of corrupted spots

I am looking at the map for the last three hours on 40m, and I see several spots which are located in the ocean, and don't look like ham call signs. All have been reported by WA4RG.

I had a quick look at the archived data for June/July, figuring that if corruptions are rate, then they will probably appear as a single entry in the data. There were around 2000 callsigns where only one spot was logged. Curiously, many of them did not look like valid call signs.

So, what about reporters. If corruption occurs, wouldn't the same effect occur where there would be a similar number of spots where the reporter made only one spot? Well, apparently not. There were less of these, and most looked like valid call sign formats.