The route HKJK > HKJK deduced from the callsign is incompatible with the received points: it is not drawn. Confidence reduced to 20/100.
First and last received points. Two measurements, nothing in between.
'Entry' and 'exit' mark where the station began and stopped receiving the aircraft, at the edges of the antenna's range: not where the aircraft appeared or vanished.
Start and end of contact
An altitude here falls below the ground of the covered area (lowest point: 372 m, the value drops under 300 m): suspect, probable corrupted frame.
