QZS-1R

QZS-1R is a Japanese navigation satellite consisting part of the Quasi-Zenith Satellite System. QZS-1R replaced the QZS-1 satellite launched in September 2010. QZS-1 had a design life of ten years. As QZS-1 was an experimental satellite, it did not broadcast the MADOCA signal, which can be used for centimeter-order navigation. With the launch of QZS-1R, all satellites of QZSS are capable of transmitting in the MADOCA signal, reaching operational capacity.

Satellite

QZS-1R is the fourth operational Quasi-Zenith Satellite to be launched. The design of the satellite is based on QZS-2 and 4, with minor differences such as an increase in the number of temperature sensors on board.

Launch

QZS-1R was launched on 26 October 2021 by Mitsubishi Heavy Industries.