Method for operating a correction service system for a satellite-based navigation system , the correction service system having multiple reference stations having known and fixed coordinates in a coordinate system, wherein - the multiple reference stations are operated to receive satellite signals from multiple satellites of the satellite-based navigation system , wherein - at least one correction value is predefined and made available to multiple user devices of the satellite-based navigation system on the basis of satellite signals received from at least one selected reference station of the multiple reference stations and the known coordinates of the at least one selected reference station , and wherein - the at least one correction value is checked for plausibility, characterized in that - the correction service system divides the coordinate system into multiple regions , in which each of the multiple user devices can identify an individual position on the basis of the received at least one correction value , wherein - the plausibility of the at least one correction value is taken as a basis for selecting at least one specific region from the multiple regions , wherein - the at least one specific region is assigned the at least one correction value , wherein - at least one information packet is generated, containing at least information about the plausibility of the at least one correction value and the at least one specific region , and wherein - the at least one information packet is made available to at least one selected group of the multiple user devices , the selected group of the multiple user devices being assigned such user devices as move in the direction of the at least one specific region . - the multiple reference stations are operated to receive satellite signals from multiple satellites of the satellite-based navigation system , wherein - at least one correction value is predefined and made available to multiple user devices of the satellite-based navigation system on the basis of satellite signals received from at least one selected reference station of the multiple reference stations and the known coordinates of the at least one selected reference station , and wherein - the at least one correction value is checked for plausibility, - the correction service system divides the coordinate system into multiple regions , in which each of the multiple user devices can identify an individual position on the basis of the received at least one correction value , wherein - the plausibility of the at least one correction value is taken as a basis for selecting at least one specific region from the multiple regions , wherein - the at least one specific region is assigned the at least one correction value , wherein - at least one information packet is generated, containing at least information about the plausibility of the at least one correction value and the at least one specific region , and wherein - the at least one information packet is made available to at least one selected group of the multiple user devices , the selected group of the multiple user devices being assigned such user devices as move in the direction of the at least one specific region . <EOS>