GPS Signal Obstruction Analysis
The question asks to identify the correct statement regarding the Global Positioning System (GPS).
Evaluating GPS Statements
- Option 1 Incorrect: The full form is Global Positioning System, not Galileo Positioning System. Galileo is a separate satellite navigation system.
- Option 2 Incorrect: GPS was developed by the United States Department of Defense, not Russia.
- Option 3 Correct: GPS relies on radio signals transmitted from satellites. Physical obstructions like mountains and large building blocks (buildings) can block or weaken these signals, affecting the accuracy or availability of the GPS fix.
- Option 4 Incorrect: The full form is Global Positioning System, not Global Placing System.
Conclusion on GPS
Therefore, the statement that mountains and building blocks can act as obstacles to GPS signals accurately describes a characteristic of GPS technology.
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