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Wideband Inter-Networking engineering test and Demonstration Satellite, also called Kizuna


Designation 32500 / 08007A
Launch date 23 Feb 2008
Country of origin Japan
Mission Telecommunications (experimentai)
Geostationary orbit see below
Launch vehicle H2A #21

Will experiment high speed internet such as 155 Mbps (down) and 6 Mbps (up) for households and upto 1.2 Gpbs for offices (5m antenna needed). Tests were successfull with a 45-cm antenna (user) and a 1.2-m antenna (ground station) at 155 Mbps.

In May 2008, 2-way Internet link running at 1.2Gbps each way was achieved!


Begin End Position
L: Mar 2008 Aug 2016 143°E
Aug 2016 Feb 2019 143°E, inclined

End of life

Out of service Feb 2019
Cause Probably EOL, despite orbit being only 35800 km, not a clean junk orbit

External resources


sat-index articles

Technical data


Prime contractor JAXA and National Institute of Information and Communications Technology (NICT)
Mass at launch 4850 kg
Dry mass 2700 kg
Solar array  
Stabilization 3-axis
DC power EOL: 5 kW
Design lifetime 5 years

Will test 3 new equipements:
- two new antennas with a Multi-Beam Antenna (MBA, 2.4m) and a Multi-Port Amplifier (MPA). The MBA has 19 beams.

- a new active phased array antenna (APAA, change of coverage area)

- onboard ATM switching router (3 channels at 155 Mbps)


Main transponders  
Backup transponders  
Coverage 3 beams:
- MBA to Japan: 9 small beams
- MBA to Asia Pacific: Seoul, Beijing, Shanghai, Hong Kong, Manila, Bnagkok, Bangalore, Kuala Lumpur, Singapore, Jakarta
- APAA: Hawaii and Sydney
EIRP max  
Frequencies Uplink:

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