{HEAD ~ Systems} and {TAIL ~ methods} for a navigation satellite of a satellite positioning supplementary system are provided in which a unit generates a navigation signal with a signal strength being dimensioned in such a way that it is still possible to receive signals of other satellite navigation systems 
{ HEAD ~ Systems } and { TAIL ~ methods } for a navigation satellite of a satellite positioning supplementary system are provided in which a unit generates a navigation signal with a signal strength being dimensioned in such a way that it is still possible to receive signals of other satellite navigation systems
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