TAG: Japanese Quasi-Zenith Satellite System

QZSS satellites visibility. (Left) Color map indicating the percentage of a 24-hour period with at least one QZSS satellite visible above 70° of elevation. (Middle) Ground tracks of the QZSS satellites (Right) Color map indicating the percentage of a 24-hour period with four QZSS satellites visible simultaneously considering a cut-off elevation angle of 10°. All the panels are obtained based on the QZSS constellation on Feb. 2, 2018. (Figure/study authors)

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Photo: Lighthouse

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