Method and arrangements for the transmission of pseudolite trajectories within navigation data of a satellite navigation system

• US 7,508,341 B2
• Filed: 09/01/2004
• Issued: 03/24/2009
• Est. Priority Date: 03/16/2002
• Status: Expired due to Fees

• Current Assignee: Eads Astrium GmbH
• Original Assignee: Eads Astrium GmbH
• Inventors: Trautenberg, Hans Ludwig
• Primary Examiner(s): Issing; Gregory C
• Application Number:
  US10/930,785
• Publication Number:
  US 20050083232A1
• Time in Patent Office: 1,665 Days
• Field of Search: 342/357.09, 342/357.1, 342/385, 342/386, 701/213
• US Class Current: 342/357.48
• CPC Class Codes: G01S 19/11 wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• CPC Class Codes: G01S 19/258 relating to the satellite constellation, e.g. almanac, ephemeris data, lists of satellites in view

Abstract

Method for the transmission of navigation data to user terminals of a satellite navigation system composed of navigation satellites and pseudolites. The method includes transmitting positional information for at least one of the pseudolites, as part of the navigation data, without the use of separate channels or protocols for the transmission of the positional information for the at least one pseudolite. The positional information is transmitted in the form of a model of a pseudolite trajectory in a reference coordinate system which the model accounts for orbit-divergent motions of the at least one pseudolite, and the positional information for the at least on pseudolite forms a part of the navigation data.

Claims

1. A method for transmission of navigation data to user terminals of a satellite navigation system composed of navigation satellites and pseudolites, comprising:

transmitting positional information for at least one of the pseudolites as part of the navigation data, without the use of separate channels or protocols, wherein the positional information is transmitted in the form of a model of a pseudolite trajectory in a reference coordinate system which the model accounts for orbit-divergent motions of the at least one pseudolite; and

transmitting positional information for the navigation satellites in the form of a model of a navigation satellite trajectory in the same reference coordinate system and using a different model for the pseudolite trajectory,

wherein identification of the model is included within the navigation data.

2. A satellite navigation system composed of navigation satellites and pseudolites, the system comprising:

navigation satellite transmitters, associated with the navigation satellites, that transmit navigation data to user terminals;

pseudolite transmitters, associated with the pseudolites, that transmit navigation data to user terminals; and

pseudolite modeling devices, associated with each of the pseudolites, that are structured and arranged to prepare model data of a pseudolite trajectory in a reference coordinate system, wherein the model data accounts for orbit-divergent motions of each of the pseudolites, and said modeling devices are configured to insert the model data into the navigation data,

wherein each navigation satellite further comprises;

a navigation satellite modeling device structured and arranged to prepare model data of a navigation satellite trajectory in the same reference coordinate system, wherein the model data is inserted into the navigation data,

wherein the model data of said pseudolite modeling devices are different from the model data of the navigation satellite modeling device, the model data comprises a first submodel that describes orbital motions and a second submodel that describes orbit-divergent motions, and identification of the applicable model is included within the navigation data.

3. A user terminal for a satellite navigation system, said satellite navigation system transmitting navigation data from navigation satellites and pseudolites that includes model data of a pseudolite trajectory in a reference coordinate system by transmitting positional information for at least one of the pseudolites as part of the navigation data, without the use of separate channels or protocols, such that the positional information is transmitted in the form of a model of a pseudolite trajectory in a reference coordinate system which the model accounts for orbit-divergent motions of the at least one pseudolite, the user terminal comprising:

a receiver for receiving the navigation data;

a position model decoding device structured and arranged to extract the model data of a pseudolite trajectory in the reference coordinate system from the navigation data, to account for model data of orbit-divergent motions of at least one pseudolite, and to determine a position of at least one pseudolite according to the model data, without separate devices for receiving and for decoding separate channels or protocols for positional information of the pseudolites,

wherein the position model decoding device is also configured to extract model data of a navigation satellite trajectory in the same reference coordinate system from the navigation data and to determine the position of at least one navigation satellite on a basis of the model data, wherein the position model decoding device is configured to identify and extract separate models for the pseudolite trajectory and for the navigation satellite trajectory based on identification of the applicable model within the navigation data.