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Basic Survey Scheduling for the Wide Field Survey Telescope(WFST)

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Aiming at improving the survey efficiency of the Wide Field Survey Telescope,we have developed a basic scheduling strategy that takes into account the telescope characteristics,observing conditions,and weather conditions at the Lenghu site.The sky area is divided into rectangular regions,referred to as"tiles,"with a size of 2°577 × 2°.634 slightly smaller than the focal area of the mosaic CCDs.These tiles are continuously filled in annulars parallel to the equator.The brightness of the sky background,which varies with the moon phase and distance from the moon,plays a significant role in determining the accessible survey fields.Approximately 50 connected tiles are grouped into one block for observation.To optimize the survey schedule,we perform simulations by taking into account the length of exposures,data readout,telescope slewing,and all relevant observing conditions.We utilize the Greedy Algorithm for scheduling optimization.Additionally,we propose a dedicated dithering pattern to cover the gaps between CCDs and the four corners of the mosaic CCD array,which are located outside of the 3° field of view.This dithering pattern helps to achieve relatively uniform exposure maps for the final survey outputs.

telescopessurveysMoon

Yan-Peng Chen、Ji-An Jiang、Wen-Tao Luo、Xian-Zhong Zheng、Min Fang、Chao Yang、Yuan-Yu Hong、Zong-Fei Lü

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Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China

School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China

Department of Astronomy,University of Science and Technology of China,Hefei 230026,China

National Astronomical Observatory of Japan,National Institutes of Natural Sciences,2-21-1 Osawa,Mitaka,Tokyo 181-8588,Japan

Institute of Deep Space Sciences,Deep Space Exploration Laboratory,Hefei 230026,China

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国家自然科学基金国家自然科学基金国家自然科学基金science research grants from the China Manned Space Projectscience research grants from the China Manned Space Projectscience research grants from the China Manned Space ProjectCyrus Chun Ying Tang Foundations

122330051207307812173088CMS-CSST-2021-A02CMS-CSST-2021-A04CMS-CSST-2021-A07

2024

10.1088/1674-4527/ad07cd

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(1)
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