WINDS (Wideband InterNetworking engineering test and Demonstration Satellite, also known as Kizuna), was a Japanese communication satellite. Launch was originally scheduled for 2007. The launch date was eventually set for 15 February 2008, but a problem detected in a second stage maneuvering thruster delayed it to 23 February. Lift-off occurred at 08:55 GMT on 23 February from Tanegashima Space Center, and the satellite separated from its H-IIA carrier rocket into a Geosynchronous transfer orbit at 09:23. WINDS was used to relay the internet to Japanese homes and businesses through Ka-Band signals. It also tested technologies that would be utilised by future Japanese communication satellites. A part of Japan's i-Space program, WINDS was operated by JAXA and NICT.
Launch of WINDS (Kizuna) on H-IIA Flight 14.
|Mission duration||5 years (design) |
Final: 11 years, 4 days
|Launch mass||4,850 kilograms (10,690 lb)|
|BOL mass||2,750 kilograms (6,060 lb)|
|Start of mission|
|Launch date||23 February 2008, 08:55UTC|
|Launch site||Tanegashima Y1|
|End of mission|
|Deactivated||27 February 2019, 06:54UTC|
|Semi-major axis||42,164 kilometres (26,199 mi)|
|Perigee altitude||35,784.1 kilometres (22,235.2 mi)|
|Apogee altitude||35,803.8 kilometres (22,247.4 mi)|
|Epoch||00:00:00 UTC 2016-08-31|
Prior to launch, a JAXA brochure claimed that WINDS will be able to provide 155 Mbit/s download speeds to home users with 45-centimetre diameter satellite dishes, while providing industrial users via 5-metre diameter dishes with 1.2 Gbit/s speeds.
WINDS had a launch mass of 4,850 kg, reducing to a mass of around 2,750 kg after thrusting to its operational orbit. The spacecraft is 8 m x 3 m x 2 m in size, and its solar panels have a span of 21.5 metres. It has three-axis stabilisation, and a design life expectancy of five years.
- Kallender-Umezu, Paul (24 November 2014). "Japan's NEC Looks To Expand Commercial Market Footprint". Retrieved 31 August 2016.
- "WINDS (KIZUNA)". N2YO.com. 31 August 2016. Archived from the original on 31 August 2016. Retrieved 31 August 2016.
- "JAXA - 超高速インターネット衛星―WINDS" (PDF). JAXA. 26 December 2007. Archived from the original (PDF) on 28 February 2008. Retrieved 23 February 2008.
- 「きずな」（WINDS）の運用状況について (in Japanese). JAXA. 13 February 2019. Retrieved 6 March 2019.
- 超高速インターネット衛星「きずな」（WINDS）の運用終了について (in Japanese). JAXA. 1 March 2019. Retrieved 6 March 2019.
- JAXA website about WINDS
- LIVE COVERAGE: H-IIA KIZUNA (WINDS) Launch (updated 1:20 GMT) 1:20 GMT (8:20 pm EST): T-6 hours. Fueling of the H-IIA has commenced
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