Using known conditions, creating a new physical situation can construct a synchronous satellite motion model, achieve three satellites covering the world, and combine geometric figures to reason about possible results.
Using known conditions, creating new physical situations can construct synchronous satellite motion models, realize the global coverage of three satellites, and combine geometric reasoning to possible results.
Using the known conditions to create a new physical situation, we can construct a synchronous satellite motion model, realize the global coverage of three satellites, and infer the possible results with geometry.