Positioning system along the length at least one radiating cable, said system being characterised in that it comprises the following in addition to said radiating cable (110, 510): - generating means (120, 520) for generating first and second GNSS signals, the first GNSS signals being defined as signals that would be received at the same instant at a first point ( A ') in an open sky configuration from a first set ( S 1) of satellites visible from a first end of the cable in a first visibility cone ( C 1) around an axis connecting the first and second ends of the cable and along the direction towards the end opposite to the second end, the second GNSS signals being defined as signals that would be received at the same instant at a second point ( B') in an open sky configuration from a second set ( S 2) of satellites visible from the second end of the cable in a second visibility cone ( C 2) around said axis and along the direction towards the end opposite to the first end, the first and second visibility cones having an empty intersection, said first and second sets of satellites being not empty, the first point being located on said axis, beyond the first end and at a distance Δ from it along the direction opposite the second end, the second point being located on said axis, beyond the second end and at a distance Δ from it along the direction opposite the first end, with Δ = l 2 c ν − 1 in which l is the length of the radiating cable, v and c are the propagation speeds of electromagnetic waves in the radiating cable and in a vacuum respectively; - first injection means to inject the first GNSS signals into the first end of the radiating cable; - second injection means to inject the second GNSS signals into the second end of the radiating cable. - generating means (120, 520) for generating first and second GNSS signals, the first GNSS signals being defined as signals that would be received at the same instant at a first point ( A ') in an open sky configuration from a first set ( S 1) of satellites visible from a first end of the cable in a first visibility cone ( C 1) around an axis connecting the first and second ends of the cable and along the direction towards the end opposite to the second end, the second GNSS signals being defined as signals that would be received at the same instant at a second point ( B') in an open sky configuration from a second set ( S 2) of satellites visible from the second end of the cable in a second visibility cone ( C 2) around said axis and along the direction towards the end opposite to the first end, the first and second visibility cones having an empty intersection, said first and second sets of satellites being not empty, the first point being located on said axis, beyond the first end and at a distance Δ from it along the direction opposite the second end, the second point being located on said axis, beyond the second end and at a distance Δ from it along the direction opposite the first end, with Δ = l 2 c ν − 1 in which l is the length of the radiating cable, v and c are the propagation speeds of electromagnetic waves in the radiating cable and in a vacuum respectively; - first injection means to inject the first GNSS signals into the first end of the radiating cable; - second injection means to inject the second GNSS signals into the second end of the radiating cable.