The successor to the first quasi-zenith satellite, dubbed Michibiki, is expected to launch this year.

Michibiki was launched by the Japan Aerospace Exploration Agency (JAXA) in September 2010 and was transferred to the Cabinet Office in 2017. The replacement satellite is now undergoing prototype testing at the satellite manufacturer’s facility  (Mitsubishi Electric Co. Ltd. Kamakura Seisakusho) in Kanagawa.

The tests will confirm performance of the replacement satellite before it is put into service. It is undergoing acousitic, vibration and thermal vacuum tests to ensure it will remain functional after launch and in space.

After testing, the satellite will be transported to the Tanegashima Space Center for launch, which is expected to take place later this year.

Though built to succeed the first QZSS satellite, the replacement is based on the second and fourth satellites

Main specifications of the successor to the first satellite and other satellites: