Topological models

Topological models are essential in both Global Navigation Satellite Systems (GNSS) and Geographic Information Systems (GIS), serving as frameworks to represent spatial relationships and features.

In GNSS, topological models are used to define the relationship between various positioning elements, such as satellites, receivers, and ground stations. The model's purpose is to ensure that satellite signals __________ ______ ___ ____ ________ __________.
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