How does WAAS enhance GPS performance?

WAAS, or the Wide Area Augmentation System, significantly improves GPS performance by enhancing three key parameters: Accuracy, Integrity, and Availability.

Accuracy is improved through the use of ground-based reference stations that monitor GPS satellite signals and calculate correction data. These corrections are then transmitted to users, allowing for much more precise positioning than what traditional GPS can provide alone.

Integrity refers to the system's ability to provide timely information regarding the accuracy of GPS signals. WAAS ensures that the information provided to users is reliable, giving pilots the confidence that they can trust the positioning data in critical situations.

Availability means that users can access accurate and reliable position information whenever and wherever they need it. WAAS increases the availability of GPS signals by providing coverage in areas where traditional GPS might be less reliable, enhancing overall functionality especially in approaches and landings.

While increasing satellite count, improving communication from ground stations, and making adjustments to altimeter settings might seem valuable, they do not specifically encapsulate the core enhancements that WAAS provides to GPS performance as it focuses on the specified parameters of accuracy, integrity, and availability.