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Also called Michibiki 1


Designation 37158 / 10045A
Launch date 11 Sep 2010
Country of origin Japan
Mission Navigation
Perigee/Apogee 32618/38950 km (Tundra orbit)
Inclination 41°
Period 1 day
Launch vehicle H2A

Owned by Jaxa. Cost $869 million to build and launch. Went operational in Dec 2010.

First of 3 planned spacecraft GPS augmentation constellation. With the Tundra orbit, the satellites appear at high elevation angles during part of the day, convenient for high building environment.

In 2016, 3 new satellites are annouced for FY 2017 and 3 more in FY 2023.

End of life

Out of service Sep 2023?
Cause moved out of prime orbit in Jul 2023

n2yo.com tracking

Technical data


Prime contractor Melco
Mass at launch 4100 kg
Dry mass 1800 kg
Dimension 2.9 x 3.1 x 6.2 m (25.3 m deployed)
Solar array  
DC power BOL: 6.7 KW
Design lifetime 10 years

Has an L-band payload and a C-band payload for communications.

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