[CQ-Contest] Summarizing the Skimmer Accuracy Thread

[Pete Smith N4ZR]

Bret, send me your data in a form I can look at, and we can have a 
useful discussion.  I can imagine several scenarios for what you 
describe - harmonics, dueling CQs, keyclicks, and so on.

I'd love to see your data.  Your assertion about 1-2 percent errors is 
totally out of the ball park. The RBN made 3.7 million spots during ARRL 
CW - are you really saying there were 37,000-74,000 erroneous spots?  
Show me!

73, Pete N4ZR
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On 2/25/2013 6:33 PM, VR2BrettGraham wrote:
> Here is some more data.  On 2012-09-21, there were 151 RBN spots of 
> the same call but on another frequency >3 kc away on the same band at 
> exactly the same time (to the second) as another skimmer spot. For 
> this query, I can avoid "dupes", so opening that up to spots of the 
> same call >3 kc apart on the same band within about 9 seconds of each 
> other finds 369.
>
> That is just one mechanism.  Spots of same call on different band on 
> the very same second look to have been 140.  That's already 0.3% of 
> RBN spots that day & that will exclude a LOT of wrong-band spots.  Add 
> busted call spots & who-knows-how-many busted call wrong-band or 
> wrong-freq spots & then scale all this up by some factor as activity 
> is much higher on weekends (I'm working with weekday data here, as it 
> makes it easier to find wrong-band spots as no multi-multis on then) - 
> I believe RBN could be blowing 1-2% of what it spots, perhaps more.