Wide-field auroral imager onboard the Fengyun satellite

Xiao-Xin Zhang; Bo Chen; Fei He; Ke-Fei Song; Ling-Ping He; Shi-Jie Liu; Quan-Feng Guo; Jia-Wei Li; Xiao-Dong Wang; Hong-Ji Zhang; Hai-Feng Wang; Zhen-Wei Han; Liang Sun; Pei-Jie Zhang; Shuang Dai; Guang-Xing Ding; Li-Heng Chen; Zhong-Su Wang; Guang-Wei Shi; Xin Zhang; Chao Yu; Zhong-Dong Yang; Peng Zhang; Jin-Song Wang

doi:10.1038/s41377-019-0157-7

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Wide-field auroral imager onboard the Fengyun satellite

Article

- Wide-field auroral imager onboard the Fengyun satellite
- Light: Science & Applications Vol. 8, Issue 4, Pages: 494-505(2019)
- Affiliations：
  
  1.National Satellite Meteorological Center, China Meteorological Administration, Beijing, China
  2.Key Laboratory of Space Weather, National Center for Space Weather, China Meteorological Administration, Beijing, China
  3.Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
  4.State Key Laboratory of Applied Optics, Chinese Academy of Sciences, Changchun, China
  5.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
  6.Institutions of Earth Science, Chinese Academy of Sciences, Beijing, China
- Author bio：
  
  Xiao-Xin Zhang (xxzhang@cma.gov.cn)
  Bo Chen (chenb@ciomp.ac.cn)
- Funds：
- DOI：10.1038/s41377-019-0157-7
  CLC：
- Published：2019，
  
  Published Online：22 May 2019，
  
  Received：08 January 2019，
  
  Revised：18 April 2019，
  
  Accepted：29 April 2019
- Accepted：
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Zhang, X. X. et al. Wide-field auroral imager onboard the Fengyun satellite. Light: Science & Applications, 8, 494-505 (2019).
DOI：

Zhang, X. X. et al. Wide-field auroral imager onboard the Fengyun satellite. Light: Science & Applications, 8, 494-505 (2019). DOI： 10.1038/s41377-019-0157-7.

摘要

Abstract

The newly launched Fengyun-3D (FY-3D) satellite carried a wide-field auroral imager (WAI) that was developed by Changchun Institute of Optics

Fine Mechanics and Physics

Chinese Academy of Sciences (CIOMP)

which will provide a large field of view (FOV)

high spatial resolution

and broadband ultraviolet images of the aurora and the ionosphere by imaging the N

LBH bands of emissions. The WAI consists of two identical cameras

each with an FOV of 68° in the along-track direction and 10° in the cross-track direction. The two cameras are tilted relative to each other to cover a fan-shaped field of size 130° × 10°. Each camera consists of an unobstructed four-mirror anastigmatic optical system

a BaF

filter

and a photon-counting imaging detector. The spatial resolution of WAI is ~10 km at the nadir point at a reference height of 110 km above the Earth's surface. The sensitivity is

0.01 counts s

-1

Rayleigh

-1

pixel

-1

(140-180 nm) for both cameras

which is sufficient for mapping the boundaries and the fine structures of the auroral oval during storms/substorms. Based on the tests and calibrations that were conducted prior to launch

the data processing algorithm includes photon signal decoding

geometric distortion correction

photometric correction

flat-field correction

line-of-sight projection and correction

and normalization between the two cameras. Preliminarily processed images are compared with DMSP SSUSI images. The agreement between the images that were captured by two instruments demonstrates that the WAI and the data processing algorithm operate normally and can provide high-quality scientific data f

or future studies on auroral dynamics.

关键词

Keywords

references

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