NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header




QZS-4, which will be known as Michibiki No.4 once in orbit, is the fourth member of the Quasi-Zenith Satellite System (QZSS), a constellation of satellites which Japan is launching to improve the accuracy of satellite navigation in its densely-populated cities.

QZS broadcasts additional signals compatible with the US Air Force’s Global Positioning System (GPS), providing additional points of reference that a QZS-enabled receiver can use to triangulate its position.

Alternate Names

  • 42965
  • Michibiki No.4
  • QZS4

Facts in Brief

Launch Date: 2017-10-09
Launch Vehicle: H-2A
Launch Site: Tanegashima, Japan
Mass: 4000 kg

Funding Agency

  • Japan Aerospace Exploration Agency (Japan)


  • Navigation/Global Positioning

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

[] NASA Logo -