It uses satellite-based technology as opposed to older ground-radar-based technology to allow air traffic controllers to pinpoint aircraft with greater precision and give pilots more accurate information. Here is the same text in Chinese (Simplified):
它使用卫星技术，而不是老旧的地面雷达技术，使空中交通管制员能够更精确地定位飞机，并向飞行员提供更准确的信息。