When can auto height correction be performed for the AN/TPQ-50?

The correct answer regarding when auto height correction can be performed for the AN/TPQ-50 is when Digital Terrain Elevation Data (DTED) is loaded into the system. This is significant because the DTED provides precise elevation information that allows the radar system to accurately calibrate its height settings based on the terrain where it is deployed. By utilizing the loaded DTED, the radar can make adjustments that optimize its performance in detecting incoming indirect fire threats, thereby enhancing the overall effectiveness of the system.

Performing auto height correction after installation, during maintenance, or before power-up would not utilize the terrain-specific elevation data that DTED provides, which is crucial for achieving the accuracy required for effective operation in real-world environments. Therefore, the timing of the DTED loading directly correlates to the radar's ability to perform height correction effectively.