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Design, Performance and In-Orbit Evaluation Results of Tiangong-2 Wide-Band Imaging Spectrometer

  • Jun Wei
  • Lei Ding
  • Xianqiang He
  • Yuyu Tang
  • Xin Feng
  • Mingsen Lin
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 541)

Abstract

The system design, performance and in-orbit evaluations of a push-broom wide-band imaging spectrometer (WIS) on Tiangong-2 space laboratory is introduced. The WIS has 100 m spatial resolution in ocean color bands (FOV is around 42°), which is the highest compared to other in-orbit ocean color sensors (GOCI, MODIS, VIIRS, and OLCI). Besides, WIS includes visible and near infrared (VNIR), shortwave infrared (SWIR) and thermal infrared (TIR) channels and has excellent performance in ocean color monitoring, and SNR in 0.4–0.8 μm is more than 400 at typical oceanic radiance. Average SNR at SWIR is more than 550 at typical atmosphere radiance. Moreover, the instrument’s average NE⊿T at TIR is lower than 20 mK, which is one of the best. The in-orbit tests reveal that the ocean color components retrieved by WIS are highly consistent with the results from the typical ocean color satellite sensors (MODIS, VIIRS and GOCI), but have finer structures due to higher spatial resolution.

Keywords

Tiangong-2 Wide-band imaging spectrometer Spectral channel programming InGaAs detector assembly HgCdTe detector Dewar assembly 

Notes

Acknowledgement

Thanks to China Manned Space Engineering for providing space science and application data products of Tiangong-2.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Jun Wei
    • 1
    • 4
  • Lei Ding
    • 1
    • 4
  • Xianqiang He
    • 2
  • Yuyu Tang
    • 1
    • 4
  • Xin Feng
    • 1
    • 4
  • Mingsen Lin
    • 3
  1. 1.Shanghai Institute of Technical Physics, Chinese Academy of SciencesShanghaiChina
  2. 2.State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of Oceanography, SOAHangzhouChina
  3. 3.National Satellite Ocean Application Service, SOABeijingChina
  4. 4.Key Laboratory of Infrared System Detection and Imaging TechnologyChinese Academy of SciencesShanghaiChina

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