Regional Tropospheric Correction for Navigation Satellite Positioning

The patent applies preliminary action by pre-calculating and storing tropospheric correction parameters at multiple grid points across the service region before users need them. The reference stations continuously observe NSS signals and compute tropospheric delays in advance, creating a ready-to-use correction database that users can directly apply to resolve phase ambiguities faster and achieve precise positioning without waiting for real-time corrections.

The patent introduces an intermediary solution by deploying a network of reference stations that act as mediators between the NSS satellites and end users. These reference stations observe the same NSS signals, compute tropospheric correction parameters, and provide them to users. This intermediary system enables users to achieve high-precision carrier phase positioning without directly dealing with the complexity of ambiguity resolution, effectively bridging the gap between simple code-based positioning and complex carrier phase positioning.

The patent applies segmentation by dividing the service region into a grid of discrete points and assigning a tropospheric correction parameter to each grid point. Instead of attempting to model the entire region as a single complex system, the patent segments the troposphere into manageable discrete locations where corrections are independently calculated and stored. Users can then select the appropriate grid point correction based on their position, simplifying the overall system architecture while maintaining high accuracy across the entire service region.