[Dxspider-support] RBN Busted Skimmer Spots (addendum)

[Dirk Koopman]

On 10/07/2020 12:52, Dirk Koopman via Dxspider-support wrote:

<cut>
> Look at the variation in reported frequency ("<call> on 140xx.y" 
> above), for starters. Then there is the question of which version do I 
> use. The obvious choice is either the Q:9 spot on 06:40:23 or combine 
> with . But then one asks: is it still valid later, and if so, for how 
> long?
>
That should say: combine with one of the real spots sent by humans

<cut>
>>
>> CW and RTTY are bad for being busted.  Not so for FT4/FT8, but it 
>> still happens.  Sometimes grid squares get mistaken for call signs.  
>> I see spots for JN87FI in the last few minutes. Frequently SP5xxx 
>> calls get shortened to P5xxx.  That usually creates a big pile up.
>
> How does one determine that a potentially valid call (it passes 
> is_callsign, is_prefix and is_valid country) is not a reasonable spot 
> if it has a Q: > 1? Think of all the special calls that pop up at the 
> drop of a hat?
>

As for it being a possible busted spot, at least it is consistent, OK2EW 
seems sure :-).

10Jul2020 at 00:03:21 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0003Z Q:1 route: SK0MMR
10Jul2020 at 01:06:03 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0105Z Q:1 route: SK0MMR
10Jul2020 at 02:09:02 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0208Z Q:1 route: SK0MMR
10Jul2020 at 03:11:31 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0311Z Q:1 route: SK0MMR
10Jul2020 at 04:14:33 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0414Z Q:1 route: SK0MMR
10Jul2020 at 05:17:57 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0517Z Q:1 route: SK0MMR
10Jul2020 at 06:20:41 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0620Z Q:1 route: SK0MMR
10Jul2020 at 07:23:22 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0723Z Q:1 route: SK0MMR
10Jul2020 at 08:26:11 (progress) RBN: SPOT key: 'JN87FI|50007' = JN87FI on 
50006.6 by OK2EW @ 0826Z Q:1 route: SK0MMR

Dirk G1TLH