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中欧航天再次联手 W3C发射圆满成功

2011年10月7日16时21分,我国在西昌卫星发射中心使用长征三号乙增强型运载火箭,将法国泰雷兹阿莱尼亚宇航公司(Thales Alenia Space France)为欧洲通信卫星公司(Eutelsat Communications)制造的W3C通信卫星成功送入远地点高度35972.84公里、近地点高度205.56公里、轨道倾角26.12度的地球同步转移轨道,发射任务获得圆满成功。

这次发射是根据2008年2月22日中法双方签署的卫星发射服务合同,由中国航天科技集团公司所属的中国长城工业集团有限公司、中国运载火箭技术研究院,以及中国卫星发射测控系统部共同合作实施的。W3C卫星是法国泰雷兹阿莱尼亚宇航公司研制的大功率广播通信卫星。卫星采用Spacebus 4000 C3卫星平台,质量5400千克,装载Ku、Ka波段转发器,寿命末期输出功率为12千瓦,设计寿命超过15年,将定点于东经16度赤道上空。欧洲通信卫星公司是世界第三大固定卫星服务运营商,这颗卫星将占据其业务增长最快的轨道位置之一,波束将覆盖欧洲、印度洋岛屿、非洲等广大地区,将提供高质量的电视广播、宽带、视频、数据传输、互联网等服务。

W3C卫星是迄今长征火箭发射的质量最大的通信卫星,使用中国运载火箭技术研究院研制的长征三号乙增强型火箭发射。在长征系列运载火箭中,长征三号乙火箭地球同步转移轨道的运载能力最大,可将5500千克的有效载荷送入标准地球同步转移轨道。

这次发射是长征火箭第6次发射法国泰雷兹阿莱尼亚宇航公司研制的卫星,也是首次为欧洲卫星运营商提供发射服务。

LM-3BE Successfully Launches W3C Telecommunications Satellite

At 16:21 Beijing Time (8:21 GMT) on October 7, 2011, China Successfully launched the W3C telecommunications satellite manufactured by Thales Alenia Space France (TASF) for Eutelsat Communications (Euronext Paris: ETL) into predetermined orbit aboard an enhanced LM-3B (LM-3BE) launch vehicle from Xichang Satellite Launch Center (XSLC).

According to the data from Xi'an Satellite Control Center (XSCC),26 minutes after lift-off, the satellite and launch vehicle separated as designed. W3C satellite entered into the Geostationary Transfer Orbit (GTO) and the launch mission achieved a complete success. The injection parameters are as follows:

Item (Unit) Theoretical Value Measured Value Measured Deviation Allowable
Deviation (3σ)
emi-major Axis (km)

24437.0

24467.3

30.3

±152

Eccentricity

0.73

0.73

-

-

i (o)

26.10

26.12

0.02

±0.215

ω (°)

179.00

179.19

0.19

±0.55

Hp (km)

200.0

205.6

5.6

±28

Ha (km)

35917.6

35972.8

55.2

-

The mission is the first time that Long March provides launch services to a European satellite operator.

Eutelsat's W3C satellite is based on the Spacebus 4000 C3 platform with a lift-off mass of 5.4 tons. It has up to 56 transponders (53 Ku-band and 3 Ka-band) onboard and a design life of over 15 years. Eutelsat is one of the three largest satellite operators in the world. The W3C satellite will be positioned at 16 degrees East, one of Eutelsat's fastest-growing orbital slots, from which it will provide high-quality broadcasting services for users in Central Europe and Indian Ocean islands, as well as telecom/data services in Africa.

The LM-3BE launch vehicle for this mission is developed and manufactured by CALT. It is the most powerful launch vehicle for GTO mission in Long March fleet, and is capable of launching a payload up to 5,500kg into standard GTO. This mission is the 148th flight of Long March launch vehicles and the 45th flight of LM-3A Series launch vehicles.

 
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