题型:阅读理解 题类:模拟题 难易度:普通
江西省上饶市重点中学2019届高三英语六校第一次联考试卷(音频暂未更新)
China plans to launch 156 small satellites by 2025 to provide Internet services in low signal areas and places with adverse natural environment, according to China Aerospace Science and Industry Corporation (CASIC).
Due to environmental conditions of deserts, mountains and seas, half of the world's population has no access to the Internet, and the information deficiency hampers local development.
It will be China's first broadband Internet access system with small satellites hovering in low orbit, which will also help meet the needs of commercial space development.
The project, named Hongyun, plans to send the first satellite by 2019, and launch four more by 2020. By the end of 2025, CASIC plans to have all of the 156 satellites in operation.
The Hongyun Project, which focuses on communication, remote sensing and navigation, can offer communication and Internet services for China and less-developed 3 countries with reduced latency. Meanwhile, the project can also benefit emergency communication, sensor data collection and remote control of unmanned equipment.
Currently, international maritime satellites are widely used in communications in mountainous areas and airplanes, but those satellites, 36, 000 kilometers above the Earth, have time and signal delay as well as high cost for providing services.
The small satellites sent by the Hongyun Project will hover in low orbits only hundreds of kilometers to 1, 000 kilometers above the Earth, and thus could improve the Internet access. However, the low orbit satellites may face challenges in power supply, as they need more energy to reduce the influence of air-resistance compared to high orbit satellites. Experiments are needed to determine whether solar energy alone is enough.
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