[CQ-Contest] Reverse Beacon Network Question

[Dave/Sally Cockrum]

With the news that the Russian DX Contest will want additional 
information from QRP and LP entrants so that a comparison between 
signals can be made using the Reverse Beacon Network, I decided to 
compare the results for the recent  Sprint CW contest.  I compared the 
top five LP stations in the 3830 results (in order: KU5B, K7BG, N9CK, 
N5DO, and N7CW) for February 6 using the Signal Comparison Tool .  I 
selected the Reverse Beacon from K3LR because it had the most spots on 
that day -- 11,011.  Nothing dramatic jumped out at me from looking at 
the graphs comparing the signals, except for one thing:  The number of 
times each station was spotted by the Reverse Beacon.  Those were 
surprising:  KU5B was spotted 0 times, K7BG 58 times, N9CK 0 times, N5DO 
72 times, and N7CW 63 times. 

The leading station and number 3 were never spotted at all! 

I thought maybe it was a propagation issue, so I picked a leading 
Reverse Beacon from the west coast, WA7LNW, with 6,038 total spots on 
that day.  The same pattern occurred:  KU5B 0 spots, K7BG 46 spots, N9CK 
0 spots, N5DO 37 spots, and N7CW 12 spots.


Is this some artifact of the Sprint contest?  Is there something in the 
way KU5B and N9CK called CQ that led to them not being spotted?  And is 
there a secret to being spotted more often?  How will results like this 
effect the ability of the RBN to be an investigative tool?