Press Release


Wideband InterNetworking engineering test and Demonstration Satellite "KIZUNA" (WINDS)
Carries out World's Fastest Satellite Data Communication at Speed of 1.2 Gbps

May 12, 2008 (JST)

Japan Aerospace Exploration Agency (JAXA)
National Institute of Information and Communications Technology (NICT)

On May 2, the Japan Aerospace Exploration Agency (JAXA) and the National Institute of Information and Communications Technology (NICT) successfully achieved ultra high data rate communication at a speed of 1.2 Gigabit per second (1.2 Gbps: 622 Mbps x 2 waves), which is the fastest communication speed in the world through communication satellites. This was achieved when a communication test was conducted between the KIZUNA's multi-beam antenna and a super high data rate earth station (a 2.4m diameter antenna) set on a car at the NICT Kashima Space Research Center during the initial functional verification operations of the KIZUNA that were jointly carried out by JAXA and NICT.
Typical communication speeds for current satellite Internet services are 2 Mbps (upward) / 10 Mbps (downward) by JSAT (Japan), and 256 kbps (upward) / 1.5 Mbps (downward) by Wildblue (USA.)
The ultra high data rate communication at 1.2 Gbps via a satellite is especially useful for a backup of ground communication networks or for large volume data transmissions, and is expected to be an effective tool to bridge the problem of the "digital divide." In addition, it enables transmissions of super high definition television data that is 16 times the volume of conventional high definition television.
We will continue to verify the functions and performance of the KIZUNA, including a test of its active phased array antenna.

Outline of 1.2 Gbps Ultra High Data Rate Communication through KIZUNA