Japanese Internet satellite hits 1.2Gbps

The speed represents a record for satellite communications

Engineers testing a recently launched Japanese data communications satellite have succeeded in establishing a two-way Internet link running at 1.2G bps (bits per second) each way, they announced this week.

The speed represents a record for satellite communications, according to the Japan Aerospace Exploration Agency and the National Institute of Information and Communications Technology.

The tests were carried out on May 2 as part of verification of the Kizuna satellite. In the tests data was transmitted on two 622M-bps channels both up to the satellite and down to a receiving antenna. Together the combined data transmission speed was 1.2G bps.

Kizuna was launched on Feb. 23 and is intended to provide high-speed Internet links to homes and offices in remote areas, to organizations as a back-up during natural disasters and to improve regional communications links in Asia.

One of the satellite's special features is an on-board Asynchronous Transfer Mode (ATM) switch. In other satellite Internet systems data sent to the satellite has to be sent to an earth station, demodulated, switched to its destination and then remodulated and sent again via the satellite to reach its destination. With a switch onboard the satellite is capable of doing all this in space thus making more efficient use of the available frequency spectrum, according to JAXA.

Tests carried out in March and April verified uplink communications at 1.5M bps and downlink at 155M bps using a compact 45-centimeter antenna and both up and downstream at 155M bps using a larger 1.2-meter dish. At the time JAXA said the 155M-bps downlink was the fastest in the world achieved with such a small-size antenna.

Join the newsletter!

Or
Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Martyn Williams

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?