Quasi-Zenith Satellite System

The Quasi-Zenith Satellite System (QZSS) is a Japanese satellite network that enhances GPS signals in Japan and surrounding areas. Its satellites are strategically positioned to stay mostly overhead, providing improved accuracy and reliability for navigation, map services, and timing information. This system helps reduce signal disruptions caused by tall buildings or natural obstacles, making location-based services more precise, especially in urban environments. QZSS works in tandem with global GPS satellites but offers better performance tailored to Japan’s geographical needs, ensuring more consistent and accurate positioning for users.