https://youtu.be/JxuUOnDLUVA first signal at start sesion sporadic-e
https://youtu.be/ejVewLZlEys secondary turk signal
https://youtu.be/nMNMfBki4qA three turk signal
https://youtu.be/UaEiiQFUeOA trt1 samsun sporadic-e
https://youtu.be/ubZOKRr8j5g and finaly arabic ionoscatter
