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中国日报:China begins space-based broadband project

发布时间:2018-12-22    【来源:二院党工部】

中国日报、中国日报中文网分别予以刊登。

我国首颗低轨宽带通信卫星发射成功

 

李晋 摄

中国日报12月22日酒泉卫星发射中心电(记者 赵磊) 今早7点51分,中国航天科工集团有限公司虹云工程首星在酒泉卫星发射中心成功发射并进入预定轨道,标志着我国低轨宽带通信卫星系统建设迈出了实质性的一步。

李晋

据介绍,虹云工程首星是我国首颗低轨宽带通信技术验证卫星,并首次将毫米波相控阵技术应用于低轨宽带通信卫星,能够利用动态波束实现更加灵活的业务模式。后续将以此卫星为基础开展低轨天基互联网试验与应用示范。

除通信主载荷外,虹云工程首星还承载了光谱测温仪和3S(AIS/ADS-B/DCS)载荷,实现高层大气温度探测和船舶自动识别系统(AIS)信息、飞机广播式自动相关监视(ADS-B)信息和传感器数据信息采集(DCS),可广泛应用于科学研究、环境、海事、空管等领域。

中国航天科工实施的虹云工程旨在构建覆盖全球的低轨宽带通信卫星系统,以天基互联网接入能力为基础,融合低轨导航增强、多样化遥感,实现通、导、遥的信息一体化。整个工程分为三个阶段,第一阶段,2018年底发射首星,第二阶段,“十三五”末发射4颗业务试验星,第三阶段,到“十四五”中期完成天地融合系统建设,具备全面运营条件。当前,虹云工程总体进展处于与国际先进水平并跑状态。

此外,中国航天科工正在武汉国家航天产业基地建设具备卫星批产能力的智能化卫星生产线,将为后续星座建设奠定基础。

 

 

China launched a communications satellite on Saturday, marking the start of construction of a vast space-based communications network capable of covering the entire world with broadband internet service.

The first satellite in the Hongyun project, which was planned by China Aerospace Science and Industry Corp (CASIC) to be the country's first low-orbit broadband communications satellite constellation, was launched on Saturday at 7:51 am on a Long March 11 carrier rocket at the Jiuquan Satellite Launch Center in northwestern China.

The spacecraft is tasked with verifying basic designs of Hongyun satellite and demonstrating low-orbit broadband communications technologies.

Its main payloads are Ka-band transponders and transmission antennae. It also carries several scientific and technical devices to explore Hongyun system's applications in scientific research, environmental survey as well as air and sea transportation, CASIC said in a statement.

Weighing 247 kilograms, the satellite works in a sun-synchronous orbit about 1,100kilometers above earth. It is powered by solar arrays and has a design life of one year, but is expected to operate longer, according to Xiang Kaiheng, Hongyun's chief designer at CASIC Space Engineering Development Co Ltd in Beijing, which is responsible for developing and running the Hongyun constellation.

After a yearlong in-orbit technological demonstration by the satellite, CASIC plans to launch four mass-production Hongyun satellites before the end of 2020 to form a small network for Hongyun's trial run, he said.

The Hongyun project, started by CASIC in September 2016, aims to build a space-based communications network to provide broadband internet connectivity to users around the world, especially those in underserved regions.

CASIC currently intends to place more than 150 Hongyun satellites on orbits about 1,000 kilometers above the ground around 2023, while the constellation is likely to be further expanded in response to market demands, the designer said.

Globally, the concept of running a low-cost, high-performance satellite network to provide space-based communications and internet services has become popular among industry players.

The United States' SpaceX launched two experimental satellites last month to test technologies for its Starlink project, in which tech tycoon Elon Musk proposes to put a total of nearly 12,000 satellites into orbit by the mid-2020s.

Another US firm, OneWeb, plans to launch a satellite constellation of 648 low-Earth orbit microsatellites by the end of 2019, though few developments have been reported.

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