METHOD FOR OPERATURED A CORRECTION SERVICE SYSTEM AND CORRECTION SERVICE SYSTEM

Description

[0001] The invention relates to a method for operating a correction service system and a correction service system. State of the art

[0002] Global Navigation Satellite Systems (GNSS) enable the determination of the position of a user device, such as a navigation system, in a coordinate system. The user device determines the travel times of received satellite signals from satellites of the Global Navigation Satellite System, and uses this to derive distances between the respective satellites and the user device. The speed of light is usually assumed to be the speed of transmission for satellite signals. If interference occurs during transmission, for example due to certain conditions in the ionosphere or troposphere, travel time changes occur, which can lead to errors in positioning.To account for such interference, correction services are known which, using an existing network of stationary reference stations, determine deviations between coordinates determined using satellite signals and known coordinates of the respective reference station, derive correction values, and provide these correction values ​​to user devices. The correction values ​​are intended to correct errors of the type described in the positioning of user devices. A disadvantage is that no or only limited information is provided regarding the integrity of the correction values, in particular their plausibility. Furthermore, this information is not provided region-specifically. This results in uncertainty in the positioning results, in particular a lack of relevance of integrity information to specific regions.This is particularly problematic in connection with safety-critical applications of the global navigation satellite system.

[0003] A generic method is known, for example, from patent KR 101 212 119 B1. The publication "Design of Integrity Function on Centimeter Level Augmentation Service (CLAS) in Japanese Quasi-Zenith Satellite System" (DOI:10.33012 / 2016.14571) describes a correction service system in which the coordinate system is divided into several regions. Patent AU 733 187 B2 also deals with the region-specific determination and provision of correction data. Disclosure of the invention

[0004] The invention is based on the object of providing a method for operating a correction service system and a correction service system, wherein the aforementioned disadvantages do not occur.

[0005] The problem is solved by creating the subject matter of the independent claims. Advantageous embodiments emerge from the subclaims.

[0006] The object is achieved in particular by providing a method for operating a correction service system for a satellite-based navigation system, wherein the correction service system has a plurality of reference stations having known and fixed coordinates in a coordinate system. The plurality of reference stations are operated to receive satellite signals from a plurality of satellites of the satellite-based navigation system. At least one correction value is then specified as a function of satellite signals received by at least one selected reference station of the plurality of reference stations and the known coordinates of the at least one selected reference station and is made available to a plurality of user devices of the satellite-based navigation system. The at least one correction value is checked for plausibility.The correction service system according to the invention divides the coordinate system into a plurality of regions, in which the plurality of user devices can each determine their own position depending on the received at least one correction value. Depending on the plausibility of the at least one correction value, at least one specific region is selected from the plurality of regions, with the at least one correction value being assigned to the at least one specific region. Within the scope of the method according to the invention, at least one information packet is generated, which contains at least information about the plausibility of the at least one correction value and the at least one specific region.The at least one information packet is then made available to at least one selected group of the plurality of user devices, wherein those user devices which are moving in the direction of the at least one specific region are assigned to the selected group of the plurality of user devices. The method has advantages over the prior art. Because the at least one information packet contains at least information about the plausibility, in particular a lack of plausibility, of the at least one correction value and the at least one specific region, preferably the at least one selected group of the plurality of user devices which is affected in particular by a malfunction in the satellite-based navigation system or the correction service system which leads to a lack of plausibility of the at least one correction value is informed accordingly.In this way, information about a lack of plausibility of the at least one correction value is preferably provided in the at least one specific region by means of the at least one information packet, wherein the at least one correction value is preferably still used for position determination in regions other than the at least one specific region. In particular, it is therefore not necessary to mark the at least one correction value as implausible in a global area by means of the at least one information packet. In addition, it is preferably provided that the at least one information packet is specifically made available to the selected group of the plurality of user devices, wherein provision of the at least one information packet to all user devices, in particular regardless of the relevance of the information packet to them, can be avoided.Rather, the use of the at least one correction value is preferably identified as critical only for the at least one specific region in which the at least one correction value leads to an erroneous position determination result with an increased probability, particularly for the selected group of multiple user devices. Overall, the correction service system can significantly increase the reliability, accuracy, and availability of position determination by user devices.

[0007] The plurality of reference stations are preferably configured as stationary reference stations, which are arranged in particular within a global network and / or within a local network of reference stations. Preferably, the plurality of user devices are each configured as a navigation device in a motor vehicle, mobile phone, tablet computer, wearable, mobile unit, or in another form. The at least one correction value is preferably used to compensate for errors within the correction service system and / or the satellite-based navigation system, which in particular only have a local effect or affect a specific region.Preferably, the at least one correction value is used to compensate for ionospheric and / or tropospheric disturbances, in particular in the satellite-based navigation system, wherein in particular scintillation, influences of solar winds, sudden ionospheric disturbance (SID), polar cap absorption (PCA), ionospheric storms, and / or traveling ionic disturbances (TID) are taken into account. Preferably, at least one correction value is assigned to each individual disturbance, wherein in particular such atmospheric disturbances are assigned a specific correction value. Other types of disturbances are preferably assigned further correction values. Overall, preferably each individual disturbance or each group of disturbances is assigned at least one correction value.It is particularly possible for the received at least one correction value to be further processed by each of the multiple user devices, wherein the multiple user devices can each determine their own position depending on the further processed correction value. A lack of plausibility of the at least one correction value arises in particular when there are defects at one or more of the reference stations, the known and fixed coordinates of one or more of the reference stations have been changed, for example due to an earthquake, or there are problems in the data processing which is used in particular to determine the at least one correction value. A lack of plausibility of the at least one correction value can in particular also be related to disturbances in the ionosphere and / or the troposphere.Preferably, the at least one correction value is identified as implausible for the at least one specific region by means of the at least one information packet. The at least one specific region can then be associated, in particular, with a defective reference station, incorrect known and fixed coordinates of a reference station, or faulty data processing. In a preferred embodiment of the method according to the invention, one or more of the multiple reference stations are checked for the plausibility of correction values ​​that are generated as a function of data provided by the respective reference station—in particular by means of data processing. The multiple regions are preferably geographical regions, i.e. areas in the coordinate system.Preferably, the at least one information packet contains details about the at least one specific region, wherein in particular a corresponding area in the coordinate system is specified in the at least one information packet. The at least one information packet is preferably made available to a selected group having more than one user device of the plurality of user devices. Preferably, the at least one information packet is made available together with the at least one correction value, in particular to the selected group of the plurality of user devices, wherein preferably a common data stream is generated for transmitting the at least one correction value and the at least one information packet. Alternatively, it is preferably provided that the at least one information packet is made available to all user devices of the satellite-based navigation system.

[0008] According to a preferred embodiment of the method according to the invention, the plurality of reference stations are each assigned to at least one of the plurality of regions. In particular, one of the plurality of reference stations is assigned to more than one of the plurality of regions if two or more of the plurality of regions overlap, wherein this reference station is located within the intersection area. Preferably, the at least one correction value is assigned to the at least one specific region as a function of the at least one selected reference station by means of which the at least one correction value is determined - for example by means of data processing. In this way, a simple and reliable determination of one or more regions in which disturbances in the position determination are to be expected with an increased probability can be realized.

[0009] Preferably, the at least one specific region is determined depending on the known and fixed coordinates of the at least one selected reference station. In particular, the at least one specific region can be an area surrounding the at least one selected reference station. The known and fixed coordinates are preferably assigned a geographical location of the at least one selected reference station. Particularly preferably, this geographical location is an area in which correction values ​​are determined using the at least one reference station, by means of which correction values ​​a position determination of user devices is at least improved or even made possible in the first place. In this way, a simple and reliable determination of one or more regions in which impairments of the position determination are to be expected is enabled.

[0010] Furthermore, it is preferably provided that those user devices which are located in the at least one specific region are assigned to the selected group of the plurality of user devices. According to the invention, those user devices which are moving in the direction of the at least one specific region are assigned to the selected group of the plurality of user devices. In particular, those user devices for which the plausibility of the at least one correction value is relevant for determining their position are assigned to the selected group of the plurality of user devices. Thus, the at least one information packet can advantageously be provided to those user devices for which it is relevant for determining their position.

[0011] According to a further preferred embodiment of the method, the at least one information packet contains a first usage recommendation for the selected group of the plurality of user devices in order to instruct the selected group of the plurality of user devices to consider the plausibility of the at least one correction value, in particular a lack of plausibility thereof, when determining their respective own position. Preferably, the selected group of the plurality of user devices is instructed to determine their respective own position without the at least one correction value.

[0012] Within the scope of a method for operating a satellite-based navigation system, which is also claimed, preferably a user device of the selected group of the plurality of user devices, in particular an operator thereof, decides, in each case depending on the at least one information packet, whether or to what extent the at least one correction value is used in determining its own position. In particular, it is also possible to use the at least one correction value with a reduced weighting, preferably depending on an expected accuracy thereof, in the position determination. Alternatively, it is preferred that the decision regarding the use of the at least one correction value in determining the own position of a user device of the selected group of the plurality of user devices is made in an automated or semi-automated manner depending on the at least one information packet.Preferably, the at least one correction value is excluded from the determination of the respective own position of a user device of the selected group of multiple user devices or at least used with a reduced weighting. Particularly preferably, the use of the at least one correction value is suspended in the determination of the respective own position of a user device of the selected group of multiple user devices in the at least one specific region or at least carried out with a reduced weighting. Furthermore, it is preferred that, depending on the at least one information packet, the selected group of multiple user devices suspends the use of selected orbit or clock data of the multiple satellites, satellite signals of the multiple satellites, or other input variables required for position determination.In this way, the security and accuracy of positioning by user devices is effectively increased, particularly in the satellite-based navigation system.

[0013] Preferably, in the method for operating a correction service system, at least one selected satellite of the plurality of satellites of the satellite-based navigation system and / or at least one selected constellation of the plurality of satellites of the satellite-based navigation system are determined, which are assigned to the at least one correction value. Preferably, the at least one information packet contains a second usage recommendation for the selected group of the plurality of user devices in order to instruct the selected group of the plurality of user devices to take into account the plausibility of the correction values ​​assigned to the at least one selected satellite and / or the at least one selected constellation when determining their respective positions. The at least one selected constellation of the plurality of satellites can in particular be a group of the plurality of satellites.The assignment of the at least one selected satellite and / or the at least one selected constellation to the at least one correction value is determined in particular via the satellite signals provided by the at least one selected satellite and / or the at least one selected constellation for determining the at least one correction value. In particular, the at least one selected satellite or the at least one selected constellation are satellites or constellations that are faulty and - for example, due to the transmission or forwarding of faulty satellite signals - result in a lack of plausibility of the correction values ​​determined as a function of these satellite signals.Preferably, the correction values ​​assigned to the at least one selected satellite and / or the at least one selected constellation are used at least with a reduced weighting in the position determination or the use of the same is suspended completely.

[0014] Within the scope of the also claimed method for operating a satellite-based navigation system, the use of the at least one selected satellite and / or the at least one selected constellation in the at least one specific region is preferably suspended. The use of the at least one selected satellite and / or the at least one selected constellation is preferably suspended globally when determining the respective individual position of the selected group of multiple user devices. Suspending the use of the at least one selected satellite and / or the at least one selected constellation is preferably carried out manually, semi-automatically, or automatically. In this way, the reliability and accuracy of position determination by the user devices is effectively increased, particularly in the satellite-based navigation system.

[0015] According to a preferred embodiment of the method for operating a correction service system, atmospheric disturbances that influence the transmission of the satellite signals assigned to the at least one correction value are determined. In this case, information on the atmospheric disturbances is preferably made available to the selected group of the plurality of user devices by the at least one information packet. The satellite signals assigned to the at least one correction value are preferably satellite signals that are transmitted from one or more of the plurality of satellites to the at least one selected reference station, wherein the at least one correction value is determined as a function of these satellite signals. Within the scope of the method according to the invention, the at least one information packet comprises, in particular, information on a spatial distribution, a point in time, and / or a duration of, in particular, atmospheric disturbances.In this way, the selected group of multiple user devices can be provided with a valid basis for deciding on the use of the at least one correction value for position determination.

[0016] Preferably, the at least one correction value is specified as a function of satellite signals received by at least a plurality of selected reference stations and the known coordinates of the at least a plurality of selected reference stations, and is made available to the plurality of user devices of the satellite-based navigation system. Furthermore, the at least one correction value is preferably specified as a function of satellite signals received by all reference stations and the known coordinates of all reference stations, and is made available to the plurality of user devices of the satellite-based navigation system.

[0017] Furthermore, it is preferably provided that the at least one information packet is made available to the selected group of multiple user devices by means of at least one communications satellite, alternatively or additionally by means of a mobile radio network. The at least one communications satellite is preferably one of the multiple satellites of the satellite-protected navigation system. Alternatively, the communications satellite can also be different from the multiple satellites of the satellite-based navigation system. Two-way communication is preferably implemented by means of the mobile radio network between the selected group of multiple user devices and a device that generates the at least one information packet, in particular a data processor.By means of a mobile radio network configured in this way, it is possible, in particular, to evaluate certain navigation data, for example the location or destination, of a respective user device of the plurality of user devices and, depending on this, to make the at least one information package available specifically to user devices of the selected group of the plurality of user devices. This can, in particular, avoid making the at least one information package available to user devices for which it is not relevant. By using existing resources, in particular existing satellites and / or existing mobile radio networks, to provide the at least one information package for the selected group of the plurality of user devices, the costs of the method according to the invention can be reduced.

[0018] The inventive method for operating a satellite-based navigation system with the features of claim 10 also leads to the above-mentioned advantages. The satellite-based navigation system comprises a plurality of satellites, a plurality of user devices, and a correction service system with a plurality of reference stations having known and fixed coordinates in a coordinate system. Within the scope of the method, the plurality of reference stations are operated to receive satellite signals from the plurality of satellites of the satellite-based navigation system. At least one correction value is specified as a function of satellite signals received from at least one selected reference station of the plurality of reference stations and the known coordinates of the at least one selected reference station, and is made available to the plurality of user devices of the satellite-based navigation system.The at least one correction value is checked for plausibility. The correction service system divides the coordinate system into several regions, in which the multiple user devices each determine their own position based on the received at least one correction value. The correction service system is operated by the previously described inventive method for operating a correction service system.

[0019] Preferably, a correction service system of the type described below is operated by means of the method for operating a correction service system described above.

[0020] The correction service system according to the invention with the features of claim 11 also leads to the advantages mentioned above. It has a plurality of known and fixed reference stations. The correction service system according to the invention is designed to carry out a method for operating a correction service system of the type described above. For this purpose, programmed control devices are provided, in particular for carrying out the method according to the invention, which control devices are preferably assigned to the respective device for controlling the plurality of reference stations of the correction service system according to the invention. Preferably, programmed control devices are provided for carrying out the method according to the invention for controlling further devices of the correction service system according to the invention that are necessary or advantageous for the method.

[0021] Preferably, a satellite-based navigation system of the type described below is operated by means of the method for operating a satellite-based navigation system described above.

[0022] The satellite-based navigation system according to the invention with the features of claim 12 also leads to the above-mentioned advantages. It has a plurality of satellites, a plurality of user devices, and at least one correction service system of the type described above. The satellite-based navigation system according to the invention is designed to carry out a method for operating a satellite-based navigation system of the type described above. For this purpose, programmed control devices are provided, in particular for carrying out the method according to the invention, which control devices are preferably assigned to the respective device for controlling the plurality of satellites, the plurality of user devices, and the plurality of reference stations of the at least one correction service system according to the invention.Preferably, programmed control devices for controlling further devices of the satellite-based navigation system according to the invention that are necessary or advantageous for the method are provided for carrying out the method according to the invention.

[0023] The invention is explained in more detail below with reference to the drawings, which show: Figure 1 is a schematic representation of an embodiment of an advantageous correction service system, and Figure 2 is a schematic representation of regions in connection with the embodiment of the advantageous correction service system.

[0024] Figure 1shows a schematic representation of an embodiment of an advantageous correction service system 1. The correction service system 1 is located in a coordinate system. The correction service system 1 preferably has at least one—here two—communication satellites 2. The communication satellites 2 each move on a satellite orbit 3. It is preferably provided that a communication satellite 2 is assigned to a geographical area, in particular a continent.

[0025] Furthermore, the correction service system 1 has several reference stations 4 having known and fixed coordinates. The several reference stations 4 are in the Figure 1 illustrated embodiment, in particular reference stations in a global network 5 of reference stations 4 and reference stations in preferably several local networks 6 of reference stations 4.

[0026] Furthermore, in Figure 1a user device 7 of a satellite-based navigation system is shown, which is an example for several user devices 7 of the satellite-based navigation system. Figure 1In the exemplary embodiment shown, data packets 8 with information for determining correction values ​​or with already determined correction values ​​are made available to a data processing unit 9 - here two data processing units 9 - by means of the reference stations 4. Communication between the data processing units 9 is preferably realized, wherein the data packets 8 are preferably checked for consistency, represented by the arrow 10. The data processing units 9 are each communicatively connected to transmitting stations 11, here two transmitting stations 11 each. By means of the transmitting stations 11, a communication connection is preferably realized between the data processing units 9 and the communication satellites 2. The data processing units 9 preferably each have a communication connection with a backend server 12. The backend server 12 is communicatively connected to a mobile radio network 13.The mobile radio network 13 is here in particular wirelessly communicatively connected to a communication module 14, which is preferably assigned to one of the multiple user devices 7. In this exemplary embodiment, a communication module 14 is in communicatively connected to one of the multiple user devices 7. The multiple user devices 7 are preferably each communicatively connectable to the communication satellites 2, particularly preferably communicatively connected.

[0027] Furthermore, in Figure 1 the satellite-based navigation system 15 is shown, which has several satellites - not shown here - the several user devices 7 and the at least one - here one - correction service system 1.

[0028] The correction service system 1 is designed to carry out a method for operating a correction service system 1 of the type described below.

[0029] By means of the advantageous method for operating a correction service system 1, the correction service system 1 is operated with the plurality of reference stations 4 having known and fixed coordinates in a coordinate system. The plurality of reference stations 4 are operated to receive satellite signals from the plurality of satellites of the satellite-based navigation system 15. In a further preferred embodiment (not shown here), the plurality of satellites are designed as communication satellites 2. In this case, at least one correction value 16 is specified as a function of satellite signals received by at least one selected reference station 4' of the plurality of reference stations 4 and the known coordinates of the at least one selected reference station 4' and is made available to the plurality of user devices 7 of the satellite-based navigation system 15. In the Figure 1In the illustrated embodiment of the correction service system 1, the at least one correction value 16 is determined by means of the data processing 9 as a function of the data packets 8 provided by the reference stations 4. The at least one correction value 16 is made available to the plurality of user devices 7 via the transmitting stations 11 and the communication satellites 2, in particular sent to the plurality of user devices 7. It is particularly possible for the plurality of user devices 7 to further process the at least one correction value 16, wherein a determination of the respective own position of the plurality of user devices 7 is carried out as a function of the further processed correction value 16.In this exemplary embodiment, the at least one correction value 16 is preferably made available, in particular sent, to the plurality of user devices 7 in parallel via the backend server 12, the mobile radio network 13, and the communication module 14 assigned to the plurality of user devices 7. Preferably, the plurality of user devices 7 receive the at least one correction value 16 either from the communication satellites 2 or via the mobile radio network 13, thus ensuring a reliable supply of the at least one correction value 16 to the plurality of user devices 7. The at least one correction value 16 is checked for plausibility within the scope of the advantageous method.

[0030] Figure 2 shows a schematic representation of regions 17 in connection with the advantageous correction service system 1 and the advantageous satellite-based navigation system 15. Figure 2shows a first region 17.1, a second region 17.2, a third region 17.3, a fourth region 17.4 and a fifth region 17.5. Preferably, one or more subregions are provided within a region 17. The fourth region 17.4 here accordingly has two subregions 17.4' and 17.4". Furthermore, a global area 18 according to Figure 2 In the exemplary embodiment shown here, the global area 18 comprises at least parts of the first region 17.1, the second region 17.2, the third region 17.3, the fourth region 17.4, and the fifth region 17.5. Figure 2furthermore shows a region 17 formed as a specific region 17', which is particularly affected by a disturbance in the ionosphere and / or the troposphere. In particular, a disturbance may be present in the ionosphere and / or the troposphere and may impair the transmission of satellite signals to user devices 7. In particular, such a disturbance may impair the generation and / or provision of the at least one correction value 16, in particular for the specific region 17'. Alternatively or additionally, a disturbance may be present in the form of a defect at a reference station 4, a change in the known and fixed coordinates of a reference station 4, for example due to an earthquake, or in the form of problems in data processing 9. In particular, this impairs the generation and / or provision of the at least one correction value 16, in particular for the specific region 17'.Ultimately, in particular, a provision of preferably correct correction values ​​16 for determining the position in the at least one specific region 17' is then not or not completely possible.

[0031] The correction service system 1 divides the coordinate system into a plurality of the addressed regions 17, in which the plurality of user devices 7 can each determine, preferably determine, its own position depending on the received at least one correction value 16. Depending on the plausibility of the at least one correction value 16, in particular if the at least one correction value 16 lacks plausibility, the at least one specific region 17' is selected from the plurality of regions 17, wherein the at least one specific region 17' is assigned the at least one correction value 16. Within the framework of the advantageous method for operating a correction service system 1, at least one information packet 19 - which in Figure 1is shown schematically - which contains at least information about the plausibility, in particular a lack of plausibility, of the at least one correction value 16 and the at least one specific region 17'. In this case, the at least one information packet 19 is made available to at least one selected group of the plurality of user devices 7.

[0032] In the Figure 1 In the exemplary embodiment shown, the at least one information packet 19 is made available together with the at least one correction value 16 to the selected group of the plurality of user devices 7. The at least one information packet 19 is Figure 1illustrated embodiment, preferably by means of the data processing 9. Preferably, the at least one information packet 19 is made available to the selected group of multiple user devices 7 via the transmitting stations 11 and the communication satellites 2, in particular sent to the selected group of multiple user devices 7. Alternatively or additionally, preferably the at least one information packet 19 is made available to the selected group of multiple user devices 7 via the backend server 12, the mobile radio network 13 and the communication module 14, in particular sent to the selected group of multiple user devices 7. Preferably, the at least one information packet 19 is made available to the selected group of multiple user devices 7 in a common data stream with the at least one correction value 16, particularly preferably sent.

[0033] In another preferred embodiment, the at least one information packet 19 is generated in a different way, in particular not by means of data processing 9. The at least one information packet 19 is preferably made available separately from the at least one correction value 16 to the selected group of multiple user devices 7. Preferably, the multiple reference stations 4 are each assigned to at least one of the multiple regions 17, wherein the at least one correction value 16 is assigned to the at least one specific region 17' depending on the at least one selected reference station 4', by means of which the at least one correction value 16 is determined.

[0034] Furthermore, it is preferably provided that the at least one specific region 17' is determined as a function of the known and fixed coordinates of the at least one selected reference station 4'.

[0035] Preferably, the selected group of multiple user devices 7 is assigned those user devices 7 that are located in the at least one specific region 17'. According to the invention, the selected group of multiple user devices is assigned those user devices that are moving in the direction of the at least one specific region 17'. Preferably, the at least one information packet 19 is used to identify a plausibility—in particular a lack of plausibility—of the at least one correction value 16 in a region-specific manner. It is then preferably avoided to identify the at least one correction value 16 in the global area 18—in particular not differentiated by region—as implausible, unless the global area 18 as a whole is affected by disturbances of the type described.Alternatively or additionally, it is provided in particular that the at least one information packet 19 is not made available in the entire global area 18 to the multiple user devices 7 located there, unless the global area 18 as a whole is affected by disturbances of the type described.

[0036] Preferably, the at least one information packet 19 contains a first usage recommendation for the selected group of the plurality of user devices 7 in order to instruct the selected group of the plurality of user devices 7 to take into account the plausibility of the at least one correction value 16 when determining their respective own position, in particular in the event of a lack of plausibility thereof.

[0037] Furthermore, it is preferably provided that at least one selected satellite of the plurality of satellites of the satellite-based navigation system 15 and / or at least one selected constellation of the plurality of satellites of the satellite-based navigation system 15 are determined, which are assigned to the at least one correction value 16. Preferably, the at least one information packet 19 contains a second usage recommendation for the selected group of the plurality of user devices 7 in order to instruct the selected group of the plurality of user devices 7 to take into account the plausibility of the correction values ​​assigned to the at least one selected satellite and / or the at least one selected constellation when determining their respective positions, wherein in particular the use of such correction values ​​with a lack of plausibility is prevented or carried out with a reduced weighting thereof.

[0038] Furthermore, it is preferred that atmospheric disturbances are determined which influence the transmission of the satellite signals assigned to the at least one correction value 16 and which in particular lead to a lack of plausibility of the at least one correction value 16 determined by means of these satellite signals, wherein information on the atmospheric disturbances is made available to the selected group of the plurality of user devices 7 by the at least one information packet 19.

[0039] In a further preferred embodiment, it is provided that the at least one correction value 16 is predetermined as a function of satellite signals received by at least several selected reference stations 4' of the plurality of reference stations 4, in particular all reference stations 4, and the known coordinates of the at least several selected reference stations 4', in particular all reference stations 4, and is made available to the plurality of user devices 7 of the satellite-based navigation system 15.

[0040] Furthermore, it is preferably provided that the at least one information packet 19 is made available to the selected group of the plurality of user devices 7 by means of at least one communication satellite 2 and / or a mobile radio network 13.

[0041] The satellite-based navigation system 15 is designed to carry out a method for operating a satellite-based navigation system 15 of the type described below.

[0042] The satellite-based navigation system 15 comprises the plurality of satellites, the plurality of user devices 7, and the correction service system 1, which comprises the plurality of reference stations 4 having known and fixed coordinates in a coordinate system. Within the scope of the method for operating a satellite-based navigation system 15, the plurality of reference stations 4 are operated to receive satellite signals from the plurality of satellites of the satellite-based navigation system 15. The at least one correction value 16 is specified as a function of satellite signals received from the at least one selected reference station 4' of the plurality of reference stations 4 and the known coordinates of the at least one selected reference station 4' and is made available to the plurality of user devices 7 of the satellite-based navigation system 15. The at least one correction value 16 is checked for plausibility.Within the framework of the method for operating a satellite-based navigation system 15, the correction service system 1 is operated by means of a method for operating a correction service system 1 of the type described above.

[0043] Overall, it can be seen that by means of the method for operating the correction service system 1, the method for operating the satellite-based navigation system 15, the correction service system 1 and the satellite-based navigation system 15, the security, accuracy and availability of the determination of the respective position of the plurality of user devices 7 can be increased effectively and cost-effectively.

Claims

1. Method for operating a correction service system (1) for a satellite-based navigation system (15), the correction service system (1) having multiple reference stations (4) having known and fixed coordinates in a coordinate system, wherein - the multiple reference stations (4) are operated to receive satellite signals from multiple satellites of the satellite-based navigation system (15), wherein - at least one correction value (16) is predefined and made available to multiple user devices (7) of the satellite-based navigation system (15) on the basis of satellite signals received from at least one selected reference station (4') of the multiple reference stations (4) and the known coordinates of the at least one selected reference station (4'), and wherein - the at least one correction value (16) is checked for plausibility, characterized in that - the correction service system (1) divides the coordinate system into multiple regions (17), in which each of the multiple user devices (7) can identify an individual position on the basis of the received at least one correction value (16), wherein - the plausibility of the at least one correction value (16) is taken as a basis for selecting at least one specific region (17') from the multiple regions (17), wherein - the at least one specific region (17') is assigned the at least one correction value (16), wherein - at least one information packet (19) is generated, containing at least information about the plausibility of the at least one correction value (16) and the at least one specific region (17'), and wherein - the at least one information packet (19) is made available to at least one selected group of the multiple user devices (7), the selected group of the multiple user devices (7) being assigned such user devices (7) as move in the direction of the at least one specific region (17').

2. Method according to Claim 1, characterized in that - each of the multiple reference stations (4) is assigned to at least one of the multiple regions (17), wherein - the at least one correction value (16) is assigned to the at least one specific region (17') on the basis of the at least one selected reference station (4') by means of which the at least one correction value (16) is determined.

3. Method according to one of the preceding claims, characterized in that the at least one specific region (17') is identified on the basis of the known and fixed coordinates of the at least one selected reference station (4').

4. Method according to one of the preceding claims, characterized in that the selected group of the multiple user devices (7) is assigned such user devices (7) as are located in the at least one specific region (17').

5. Method according to one of the preceding claims, characterized in that the at least one information packet (19) contains a first recommendation for use for the selected group of the multiple user devices (7) in order to instruct the selected group of the multiple user devices (7) to take into account the plausibility of the at least one correction value (16) when identifying their respective positions.

6. Method according to one of the preceding claims, characterized in that - at least one selected satellite of the multiple satellites of the satellite-based navigation system (15) and / or at least one selected constellation of the multiple satellites of the satellite-based navigation system (15) that are associated with the at least one correction value (16) are determined, wherein - the at least one information packet (19) contains a second recommendation for use for the selected group of the multiple user devices (7) in order to instruct the selected group of the multiple user devices (7) to take into account the plausibility of correction values assigned to the at least one selected satellite and / or the at least one selected constellation when identifying their respective positions.

7. Method according to one of the preceding claims, characterized in that atmospheric interference that influences the transmission of the satellite signals associated with the at least one correction value (16) is determined, wherein the at least one information packet (19) makes information about the atmospheric interference available to the selected group of the multiple user devices (7).

8. Method according to one of the preceding claims, characterized in that the at least one correction value (16) is predefined and made available to the multiple user devices (7) of the satellite-based navigation system (15) on the basis of satellite signals received from at least multiple selected reference stations (4') of the multiple reference stations (4), in particular all reference stations (4), and the known coordinates of the at least multiple selected reference stations (4'), in particular all reference stations (4).

9. Method according to one of the preceding claims, characterized in that the at least one information packet (19) is made available to the selected group of the multiple user devices (7) by means of at least one communication satellite (2) and / or a mobile radio network (13).

10. Method for operating a satellite-based navigation system (15) having multiple satellites, multiple user devices (7) and a correction service system (1), the correction service system (1) having multiple reference stations (4) having known and fixed coordinates in a coordinate system, wherein - the multiple reference stations (4) are operated to receive satellite signals from the multiple satellites of the satellite-based navigation system (15), wherein - at least one correction value (16) is predefined and made available to the multiple user devices (7) of the satellite-based navigation system (15) on the basis of satellite signals received from at least one selected reference station (4') of the multiple reference stations (4) and the known coordinates of the at least one selected reference station (4'), and wherein - the at least one correction value (16) is checked for plausibility, characterized in that - the correction service system (1) is operated by means of a method according to one of Claims 1 to 9.

11. Correction service system (1), having multiple reference stations (4) having known and fixed coordinates in a coordinate system, characterized in that the correction service system (1) is designed to carry out a method according to one of Claims 1 to 9.

12. Satellite-based navigation system (15), having - multiple satellites, - multiple user devices (7), and - at least one correction service system (1) according to Claim 11.