Question: What is the primary purpose of periodically signaling ServingSatelliteInfo-r17 values, including EphemerisInfo-r17, in SIB31 to a User Equipment (UE) during conformance testing?
Option 1: To dynamically update UE's location-based services with real-time satellite positions.
Option 2: To ensure UE compatibility with various global navigation satellite systems (GNSS).
Option 3: To maintain a constant test environment by providing consistent Ephemeris information throughout the test duration.
Option 4: To enable UE to switch between different satellite constellations for optimal signal strength.
Explanation: The correct answer highlights the importance of maintaining a stable test environment. By keeping the Ephemeris information constant and periodically signaling it to the UE via SIB31, the test ensures reproducibility and reliability of the conformance testing results, unaffected by real-world variations in satellite positions.