GNSS Orbital Assistance Data With Antenna Phase Center Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Global navigation satellite systems (GNSS) typically provide location resolution of two to three meters, and there is a need for more accurate location determination.
Innovation Solution
A mobile station receives modified orbital assistance data from a location assistance server that includes predicted orbital information and antenna phase center offset data, allowing for more precise location calculations by accounting for the offset between the satellite's center of mass and the signal radiation source on the antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard GNSS orbital assistance data is used, then the system is simple and computational effort is low, but location accuracy is limited to two to three meters
Solution Approach 1:
The patent applies preliminary action by pre-computing and providing antenna phase center offset data along with orbital information in advance through assistance data. This allows the mobile station to perform more accurate location calculations without performing complex real-time computations, thus improving location accuracy while maintaining reasonable computational effort at the mobile station.
2Measurement precision
If antenna phase center offset data is incorporated, then location accuracy improves to within five centimeters, but the data structure and processing become more complex
Solution Approach 1:
The patent merges antenna phase center offset data with orbital assistance data into a unified data structure. By combining these previously separate data elements, the system improves location accuracy to within five centimeters while managing information processing overhead through integrated data delivery and coordinated processing of the combined dataset.
Data Source
AI summary
A method, apparatus, and system are disclosed for providing modified orbital assistance data to a mobile station to determine its location using global navigation satellite system (GNSS). In some example embodiments, a method for determining a location of a mobile station using orbital assistance data may include: receiving satellite positioning signals from a plurality of GNSS satellites; receiving orbital assistance data comprising a distance between a location on an antenna which is associated with a first frequency of the satellite positioning signals and a location on the antenna which is associated with a second frequency of the satellite positioning signals; and determining the location of the mobile station based on the orbital assistance data and the satellite positioning signals.