The Chinese Academy of Sciences: quantum satellite "mo" in-orbit testing
Quantum satellite and Ali site link. Xinhua News AgencyBeijing times News (reporters Pan Shanju) yesterday, the Chinese Academy of Sciences held a press conference to introduce the world's first quantum scientific experiment satellite "Mozi" latest developments. According to reports, the "mo" is carried out for a period of three months of on-orbit testing, is currently in good condition, is expected to complete in mid-November in-orbit test, satellite will then deliver, began scientific experiments.
Pan Jianwei, Chief Scientist, academician of quantum satellite introduced on August 16 this year, quantum science experimental satellite "Mozi" since the successful launch at the Jiuquan Satellite Launch Centre, quantum scientific experiment satellite mission plan includes three parts: launch into orbit, on-orbit testing, conducting experiments. Complete the tasks are launched into orbit before, in-orbit tests currently under way, for a period of about three months. Consists of three aspects of the test satellite platform and payload testing, to link test. Satellite platform and payload testing has been completed so far, Star link test sections.
Tests show that the satellite platform, batteries in normal state, solar powered normal remote control success rate 100%; satellite attitude control system is working properly, the performance is stable. Payload, the stand-alone boot check, normal load internal precision of the optical axis meets mission requirements; special test for complete loading single-photon detection, indicators in line with the expected finish pointing to all ground stations, good stability, tracking accuracy meets requirements; entanglement source is working, light and other indicators to meet mission requirements.
Star link testing, satellite completes the Xinglong station, Delhi, Nan shan single observer tracking test, set up satellite-ground links; South Hill station was also completed with two Delhi station tracking tests, established bilateral entangled optical link; in addition complete with Ali and pointing test teleportation link is established. "Three different links to get through and laid the foundations for the three tasks of quantum satellite. Currently we are working on parameters tuning and optimization, the next point will be looking for the best work in the test as well as accumulating data. "Pan Jianwei said.
Quantum scientific experimental satellite "Mo," the successful launch, will make China the world's first satellite and quantum communication between ground, constructing quantum scientific experiments of integrated vehicle and ground system. Satellites and ground stations will jointly perform the three tasks, namely, high speed satellite-ground quantum key distribution; star quantum entanglement distribution, large scale quantum nonlocality test; satellite-ground quantum teleportation.
(Editors: Liu Cheng UN649)
2016-10-13 03:14:00
Integrated
中科院：量子卫星“墨子号”在轨测试顺利
量子卫星与阿里站建立链路。新华社发 京华时报讯（记者潘珊菊）昨天，中科院举行新闻发布会介绍全球首颗量子科学实验卫星“墨子号”的最新进展。据介绍，“墨子号”正在开展为期三个月的在轨测试，目前状态良好，预计11月中旬完成全部在轨测试工作，随后卫星将交付使用，正式开始科学实验。
量子卫星首席科学家潘建伟院士介绍，今年8月16日，量子科学实验卫星“墨子号”在酒泉卫星发射中心成功发射以来，量子科学实验卫星任务计划包括三个部分：发射入轨、在轨测试、开展实验。之前完成的是发射入轨的任务，目前正在开展在轨测试，为期大概三个月。包括三个方面的测试，卫星平台测试、有效载荷测试、星地链路测试。目前卫星平台测试和有效载荷测试已经完成，星地链路测试部分完成。
测试显示，卫星平台方面，电池组状态正常，太阳帆板供电正常；遥控成功率100%；卫星姿控系统运行正常，性能稳定。有效载荷方面，各单机开机检查，状态均正常；载荷内部光轴匹配精度满足任务要求；完成载荷单光子探测专项测试，指标符合预期；完成对所有地面站的跟瞄，稳定性良好，跟踪精度满足要求；纠缠源工作正常，光源亮度等指标满足任务要求。
在星地链路测试方面，卫星完成了与兴隆站、德令哈站、南山站的单站跟瞄测试，建立了星地链路；同时还完成了南山站与德令哈双站跟瞄测试，建立了双边纠缠光链路；此外完成与阿里站的跟瞄测试，建立了隐形传态光链路。“三种不同链路的打通，为量子卫星的三大科学任务打下了基础。目前我们正在进行参数调整和优化，接下来的测试中将寻找最佳工作点以及积累有效数据。”潘建伟说。
量子科学实验卫星“墨子号”的成功发射，将使中国在世界上首次实现卫星和地面之间的量子通信，构建天地一体化的量子科学实验体系。卫星和地面站将共同执行三大科学任务，分别是高速星地量子密钥分发；星地量子纠缠分发，实现大尺度量子非定域性检验；星地量子隐形传态。
(责任编辑：刘盛钱 UN649)
2016-10-13 03:14:00
综合