Acta Optica Sinica, Volume. 44, Issue 18, 1828003(2024)

Design and Implementation of High-Accuracy Time Scale for Optical Remote Sensing and Analysis of Positioning Accuracy

Jun Zheng1,2、*, Xiaohong Zhang1,2, Bei Chu1,2, Yiqiu Zhang1,2, and Yongchao Zheng1,2,3
Author Affiliations
  • 1Beijing Institute of Space Mechanics and Electricity, Beijing 100094, China
  • 2Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing, Beijing 100094, China
  • 3Beijing Aviation Intelligent Remote Sensing Equipment Engineering Technology Research Center, Beijing 100080, China
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    Figures & Tables(12)
    Time scale system diagram of linear array remote sensing camera
    Time scale system diagram of linear array remote sensing camera
    Satellite second pulse signal and integer second timing schematic diagram
    Schematic diagram of imaging timing calibration based on hardware pulse per second signals
    Schematic diagram of analysis of imaging time deviation for linear array remote sensing cameras
    Schematic diagram of hardware pulse per second path delay
    Flow chart of calibration accurate measurement method for imaging time
    Schematic diagram of the farthest position of imaging line synchronization signal
    Schematic diagram of TDI push-scanning imaging
    Schematic diagram of remote sensing satellite push-broom imaging
    • Table 1. Chip transmission time parameter

      View table

      Table 1. Chip transmission time parameter

      Device nameOutput low to high transmission delay tPLHOutput high to low transmission delay tPHL
      MinimumMaximumMinimumMaximum
      26C318.258.386.106.46
      26C3212.9115.2018.0223.93
      54LVTH2450.73.70.73.7
    • Table 2. Record of time scale accurate test for certain subsystem

      View table

      Table 2. Record of time scale accurate test for certain subsystem

      No.Integal time codeTime series waveformtest value /μsCounting value inimage assisted dateCounter differencePrecision difference /μs
      10158712.0194195D7H7142.0
      194198A1H
      20139869.313BD9DD1H8672.3
      13BDA134H
      307532850.61272EE30H28482.6
      1272F950H
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    Jun Zheng, Xiaohong Zhang, Bei Chu, Yiqiu Zhang, Yongchao Zheng. Design and Implementation of High-Accuracy Time Scale for Optical Remote Sensing and Analysis of Positioning Accuracy[J]. Acta Optica Sinica, 2024, 44(18): 1828003

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: May. 28, 2024

    Accepted: Jul. 8, 2024

    Published Online: Sep. 11, 2024

    The Author Email: Zheng Jun (zhj1766@163.com)

    DOI:10.3788/AOS241086

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