Blitzortung.org Forum

Hi

I been trying to figure out the math behind the “Effectivity L”.
 
Unfortunately, I must admit that I don’t understand the logic. Please take to look at my attached image of the danish Station list.
 
I got two stations “Vejle l” and “Vejle ll”. In my logic the effectivity of “Vejle l” is better than the effectivity of “Vejle ll”.
 
Also, the top station shows the right percentage calculation while the percentages indicated for both the Vejle stations apparently showing incorrect values.
 
Top station:
strikes/signals x 100 will in real calculation be equal to: 275/839 x 100 = 32 %

Vejle ll:
strikes/signals x 100 will in real calculation be equal to: 170/493 x 100 = 34 %
 
Vejle l:
strikes/signals x 100 will in real calculation be equal to: 166/360 x 100 = 46 %
 
 
Does anyone have the mathematical understanding to explain the logic behind the percentage values listed in the attached station list? And if so, would you please explain the math and show a full example?
 

Best regards,
Arvin

You are missing at least one additional factor involved in the math...
min (Strikes / Signals(s), Signals(s) / Strikes)  
...but please note:
These calculations for the Stations listing on both
the Blitzortung  website and Lightningmaps.org
 are discussed and debated (extensively) 
at
http://forum.blitzortung.org/showthread.php?tid=1261


Note also that the 'effectivity' figures on the Stations pages
use a different 'computation' than the 'efficiency' number on
the stations network efficiency table at Lightningmaps.org....

Cheers!
Mike

(2016-01-06, 22:46)Cutty Wrote: [ -> ]You are missing at least one additional factor involved in the math...
min (Strikes / Signals(s), Signals(s) / Strikes)  
...but please note:
These calculations for the Stations listing on the Blitzortung  website
 are discussed and debated (extensively) 

at
http://forum.blitzortung.org/showthread.php?tid=1261


One purpose of these 'effectivity' figures is to indicate when a station
may be sending a lot of 'noise' or 'interference' signals in relation
to actual strokes, both within the region, etc.

Note also that the 'effectivity' figures on the Stations pages
use a different 'computation' than the 'efficiency' number on
the stations network efficiency table at Lightningmaps.org.... again, more confusion.

Cheers!
Mike

Hi Mike

Your reply added the missing part of the math. Thank you very much 

Best regards,
Arvin