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The upgrading program of "China Sky Eye": Design and key technologies of FAST Core Array
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Peng JIANG1, 2, 3, Bin LIU1, 2, Dongjun YU1, 2, 3, Hengqian GAN1, 2, 3, Rurong CHEN1, 2, Weiwei ZHU1, 2, Lei QIAN1, 2, 3, Jinghai SUN1, 2, 3, Hui LI1, 2, 3, Gaofeng PAN1, 2, 3, Boqin ZHU1, 2, 3, Xiaoming CHAI1, 2, 3, Yan ZHU1, 2, 3, Nan LI1, 2, Hao HU1, 2, 3
Science & Technology Review | 2025, 43(5) : 55 - 63
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Science & Technology Review | 2025, 43(5): 55-63
• Exclusive: Large-Scale Scientific Facilities •
The upgrading program of "China Sky Eye": Design and key technologies of FAST Core Array
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Peng JIANG1, 2, 3, Bin LIU1, 2, Dongjun YU1, 2, 3, Hengqian GAN1, 2, 3, Rurong CHEN1, 2, Weiwei ZHU1, 2, Lei QIAN1, 2, 3, Jinghai SUN1, 2, 3, Hui LI1, 2, 3, Gaofeng PAN1, 2, 3, Boqin ZHU1, 2, 3, Xiaoming CHAI1, 2, 3, Yan ZHU1, 2, 3, Nan LI1, 2, Hao HU1, 2, 3
Affiliations
  • 1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
  • 2. Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing 100101, China
  • 3. Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang 550000, China
Published: 2025-03-13 doi: 10.3981/j.issn.1000-7857.2024.10.01446
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FAST, as a world-class radio telescope, has made significant achievements in many directions. However, with the increasing international competition, FAST's limitations are becoming more apparent. Therefore, we propose the FAST Phase II project, which aims to develop a low-cost and rapidly implementable array upgrading scheme. The plan is to build 24 40-meter aperture antennas within 5 kilometers around FAST by 2027 to form a synthetic aperture array with a sensitivity of 3600 square meters per Kelvin. By the end of 2030, another 40 antennas of the same aperture will be built within 30 kilometers to form the FAST Phase II, which will enhance the imaging capability and spatial resolution. The upgraded FAST will work in conjunction with other large fully steerable single-antenna telescopes in China to achieve a resolution of 15 milliarcseconds and a sensitivity of 6400 square meters per Kelvin, about twice that of ngVLA. The FAST Phase II project will not only improve the sensitivity but also enhance the high-resolution imaging capability, so as to significantly advance the cutting-edge research in time-domain astronomy, neutral hydrogen detection of distant galaxies, large-scale structure of the universe, dark energy, and other fields.

radio astronomy  /  astronomical technique and methods  /  radio telescope  /  radio interferometer
Peng JIANG, Bin LIU, Dongjun YU, Hengqian GAN, Rurong CHEN, Weiwei ZHU, Lei QIAN, Jinghai SUN, Hui LI, Gaofeng PAN, Boqin ZHU, Xiaoming CHAI, Yan ZHU, Nan LI, Hao HU. The upgrading program of "China Sky Eye": Design and key technologies of FAST Core Array[J]. Science & Technology Review, 2025 , 43 (5) : 55 -63 . DOI: 10.3981/j.issn.1000-7857.2024.10.01446
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Year 2025 volume 43 Issue 5
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Article Info
doi: 10.3981/j.issn.1000-7857.2024.10.01446
  • Receive Date：2024-10-16
  • Online Date：2025-06-29
  • Published：2025-03-13
Article Data
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History
  • Received：2024-10-16
  • Revised：2025-02-14
Funding
Affiliations
    1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
    2. Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing 100101, China
    3. Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang 550000, China
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栓菌属 Trametes 5 2.39
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