Sharing Rogers experience ....
There were no Mode-C Audio messages in the track file supplied, there were 2 sequences of Mode-S,
The two aircraft were :-
43C1AB, I saw it here (Apparently a hercules transport which you mentioned)
$PFLAA,1,4500,,125,1,43C1AB!RRR298,,,,1.3,8*63
$PFLAA,2,3000,,125,1,43C1AB!RRR298,,,,0.0,8*60
This is saying it was within 125ft of you vertically - that's pretty close!
400FB6 (G-JKMH)
$PFLAA,3,1500,,200,1,400FB6!GJKMH,,,,1.5,8*34
This is saying it was within 200ft of you vertically
There were a total of approx 30 Audio messages, this issue was that the signal was coming and going causing the
threat to appear to reduce, then increase.
Definitely not a Ghost
Maybe you know G-JKMH ?
Thx
Lee