What key design feature of the Deep Space Network (DSN) facilities enables reliable continuous communication coverage?

Answer

Triangulation across the globe spaced roughly 120 degrees in longitude.

The DSN utilizes a global triangulation strategy involving its three complexes (Goldstone, Madrid, Canberra) spaced approximately 120 degrees apart longitudinally. This specific spacing is crucial because Mars is perpetually rotating relative to any single ground station on Earth. By having stations spread across the globe, engineers guarantee that regardless of where Mars is positioned in the sky relative to one station, at least one of the DSN sites will have a clear, high-angle line of sight to the planet at any specific moment. This ensures maximum opportunity for relay connection windows to be utilized effectively.

What key design feature of the Deep Space Network (DSN) facilities enables reliable continuous communication coverage?

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