What techniques can improve the reliability of the data link?

Using directional antennas significantly improves the reliability of the data link in Unmanned Aerial Systems (UAS). Directional antennas focus the transmission and reception of signals in a specific direction, which enhances the strength and quality of the signal received by both the UAS and the ground control station. This focused signal minimizes interference and potential signal loss, especially in environments with obstacles or when operating at long distances. Additionally, directional antennas can help maintain a stable connection even in areas with high electromagnetic interference.

While reducing control surfaces, increasing flight altitude, and utilizing visual flight rules may have their own advantages in specific contexts, they do not directly address the enhancement of the data link's reliability in the same effective manner as using directional antennas.