据约翰斯·霍普金斯大学用应物理实验室最近的研究结果显示，单独使用GPS不能满足FAA的导航要求。但是，若配以相应的广域增强系统／局域增强系统（WAAS／LAAS），GPS就能够胜任单一导航源。问题是如何增加配置才能达到所需的精度。研究还证实，采用增强系统能抵抗干扰、非有意 According to recent research by Johns Hopkins University’s Applied Physics Laboratory, GPS alone can not meet the FAA’s navigation requirements. However, with a corresponding Wide Area Augmentation System / Local Area Augmentation System (WAAS / LAAS), GPS is capable of handling a single source of navigation. The question is how to increase the configuration to achieve the required accuracy. The study also confirmed that the use of enhanced system to resist interference, not intentional