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An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research
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High Sensitive Night-time Light Imaging Camera Design and In-orbit Test of Luojia1-01 Satellite.

Zhiqiang Su1, Xing Zhong2,3, Guo Zhang4

  • 1Chang Guang Satellite Technology Co. LTD, Changchun 130102, China. suzhiqiang927@163.com.

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|February 21, 2019
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Summary

The Luojia1-01 satellite, featuring a novel optical camera, provides high-quality night-time light remote sensing data. Its advanced design ensures reliable performance for applications in urbanization, pollution analysis, and beyond.

Keywords:
Luojia1-01 satellitenight-time light cameraremote sensingsignal to noise ratiospecial shaped hood

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Area of Science:

  • Earth Observation
  • Remote Sensing Technology
  • Satellite Instrumentation

Background:

  • Night-time light remote sensing is crucial for monitoring Earth's surface changes.
  • Existing technologies faced limitations in sensitivity and stray light suppression.
  • The Luojia1-01 satellite was developed to address these challenges.

Purpose of the Study:

  • To detail the design of the optical camera payload for the Luojia1-01 satellite.
  • To evaluate the in-orbit imaging performance of the camera system.
  • To demonstrate the satellite's capability for night-time light data acquisition.

Main Methods:

  • Design and integration of a high-sensitivity optical camera with stable interior orientation elements.
  • Development of a specialized hood to mitigate stray light interference.
  • Implementation of an integrated focal plane and imaging processing electronics design.
  • In-orbit performance testing including modulation transfer function (MTF) and signal-to-noise ratio (SNR) measurements.

Main Results:

  • The optical camera achieved a dynamic modulation transfer function (MTF) exceeding 0.17.
  • Signal-to-noise ratio (SNR) was measured to be better than 35 dB under specific low-light conditions (10 lx illuminance, 0.3 reflectivity).
  • All performance indicators met or surpassed the satellite's design requirements.

Conclusions:

  • The Luojia1-01 satellite's optical camera is successfully operational for night-time light remote sensing.
  • The acquired data demonstrates high quality and reliability for diverse applications.
  • The satellite's capabilities are validated for fields including urbanization, light pollution, and marine resource monitoring.