[CQ-Contest] RBN question

[Ron Notarius W3WN]

 Tibor,
I'm no expert, but one thing stands out to me.
You are comparing three EU stations in relatively close proximity to each other to a fourth station in AS, several thousand miles or so to the East of the other three.  
Were all four stations in the same approximate area, I would expect the RBN detection from NA to be roughly equal... as it is for the three EU stations shown.  But adding in a fourth station, much further away, in a different time zone with different propagation at the same time(s)?  
RBN stations are scattered around the world, but they don't pick up everything at once.  And we don't have any information about the relative power levels, antenna configurations, operating bands, etc. to compare.
So the simple answer is just that UA9YBA's signal simply didn't reach the same RBN receivers at the same approximate time as the other three, for the reasons cited above.  In short:  Propagation.
73, ron w3wn
    On Thursday, February 20, 2025 at 07:45:05 PM EST, Tibor Finta <tibfin at gmail.com> wrote:   

 Dear Experts,

I created a quick statistics sheet on RBN figures of the ARRL DX CW contest.
I took 4  SOSB 20M stations: HG0Y, HG5E, TM4W and UA9YBA.
Here is how many times they were spotted by RBN in North America:
HG0Y:  14236
HG5E:  16648
TM4W:  16223
UA9YBA: 4918

According to 3830scores.com and contestonlinescore.com pages these are the
QSO numbers:
HG0Y:  1005
HG5E:    902
TM4W:  1139
UA9YBA:  967

My question: how could it be that three stations were spotted by RBN three
times more than UA9YBA?
I listened to UA9YBA at the end of the contest and his CQ was absolutely
correct: "CQ UA9YBA UA9YBA TEST".

73:
Tibor
HG5E / HA1AH
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