Step Aside, GPS, the Japanese “Michibiki” Promises Higher Accuracy Positioning System

  The second satellite of the Quasi-Zenith Satellite System (QZSS)—the Japanese version of the  Global Positioning System (GPS)—is scheduled for launch on June 1, and it promises to measure a position on the ground with higher accuracy.   The QZSS is a four-satellite system, and the Japanese aim to put it in full-scale operation starting […]