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Acta Optica Sinica, Volume. 40, Issue 9, 0928002(2020)

On-Board Absolute Radiometric Calibration and Validation Based on Solar Diffuser of HY-1C SCS

Heyu Xu1,2、*, Liming Zhang1, Wenxin Huang1, Xin Li1, Xiaolong Si1, Weiwei Xu1, and Qingjun Song3
Author Affiliations
  • 1Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
  • 2University of Science and Technology of China, Hefei, Anhui 230026, China
  • 3National Satellite Ocean Application Service, Beijing 100081, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    References (32)
    Cited By (6)
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    Figures & Tables(14)
    Structural diagram of SCS[25]

    Fig. 1. Structural diagram of SCS[25]

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    Schematic of on-board calibration system

    Fig. 2. Schematic of on-board calibration system

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    Measurement results from laboratory. (a) Distribution characteristic of BRDF; (b) transmittance of attenuation screen

    Fig. 3. Measurement results from laboratory. (a) Distribution characteristic of BRDF; (b) transmittance of attenuation screen

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    Spectral response function of MODIS

    Fig. 4. Spectral response function of MODIS

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    Flow chart of cross-validation

    Fig. 5. Flow chart of cross-validation

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    Images. (a) Geometrically corrected MODIS image; (b) image of crossover region in MODIS and SCS; (c) geometrically corrected SCS image

    Fig. 6. Images. (a) Geometrically corrected MODIS image; (b) image of crossover region in MODIS and SCS; (c) geometrically corrected SCS image

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    Images. (a) Resampled MODIS image; (b) uniform crossover region in MODIS and SCS; (c) geometrically corrected SCS image

    Fig. 7. Images. (a) Resampled MODIS image; (b) uniform crossover region in MODIS and SCS; (c) geometrically corrected SCS image

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    Data processing results. (a) Radiance of SCS; (b) cross-validation result on 2019--01--24

    Fig. 8. Data processing results. (a) Radiance of SCS; (b) cross-validation result on 2019--01--24

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    Predicted equivalent radiance and measured equivalent radiance obtained of MODIS. (a) 2019--02--28; (b) 2019--03--13

    Fig. 9. Predicted equivalent radiance and measured equivalent radiance obtained of MODIS. (a) 2019--02--28; (b) 2019--03--13

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    Degradation factor of calibrated solar diffuser

    Fig. 10. Degradation factor of calibrated solar diffuser

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    • Table 1. Dynamic range of SCS and SNR

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      Table 1. Dynamic range of SCS and SNR

      Wavelength /nmTypical spectral radiance /(mW·cm-2·μm-1·sr-1)SNR
      4129.10800
      4438.41950
      4906.561000
      5205.461000
      5654.57950
      6702.46800
      7501.61750
      8651.09950

    • Table 2. Overpass time and geometric parameters of TERRA MODIS and HY-1C SCS

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      Table 2. Overpass time and geometric parameters of TERRA MODIS and HY-1C SCS

      SensorOverpassLatitudeLongitudeSensorSolar
      DateTimeZenith /(°)Azimuth /(°)Zenith /(°)Azimuth /(°)
      MODIS2019--01--2410:53:0835.1856°N120.1132°E1.4788-87.938657.4255158.1702
      SCS2019--01--2410:48:1835.1851°N120.1149°E0.2168288.674757.8052157.1248

    • Table 3. Overpass time and geometric parameters of TERRA MODIS and HY-1C SCS

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      Table 3. Overpass time and geometric parameters of TERRA MODIS and HY-1C SCS

      SensorOverpassLatitudeLongitudeSensorSolar
      DateTimeZenith /(°)Azimuth /(°)Zenith /(°)Azimuth /(°)
      MODIS2019--02--2811:28:5617.9005°N107.3940°E4.3040100.373834.7500136.5062
      SCS2019--02--2811:27:5217.9006°N107.3940°E0.2432188.868334.9271136.1380
      MODIS2019--03--1311:56:4817.3749°N90.5785°E1.2363106.590230.0571130.6945
      SCS2019--03--1311:55:0217.3750°N90.5785°E0.2434188.949930.4301129.9876

    • Table 4. Relative deviation between measured equivalent radiance and predicted equivalent radiance

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      Table 4. Relative deviation between measured equivalent radiance and predicted equivalent radiance

      BandCenter wavelength /nmRelative deviation /%
      2019--01--242019--02--282019--03--13
      B8412.500.810.111.68
      B9443.003.243.221.47
      B3469.001.210.960.67
      B10488.001.351.943.52
      B11531.003.644.105.47
      B12551.002.212.743.88
      B4555.001.442.323.27
      B1645.000.180.880.69
      B14667.000.866.790.54
      B15678.000.944.961.18
      B17748.003.305.241.81
      B2858.502.750.040.57
      Max3.646.795.47
      Statistical resultMin0.180.040.54
      Average1.832.782.06
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    Heyu Xu, Liming Zhang, Wenxin Huang, Xin Li, Xiaolong Si, Weiwei Xu, Qingjun Song. On-Board Absolute Radiometric Calibration and Validation Based on Solar Diffuser of HY-1C SCS[J]. Acta Optica Sinica, 2020, 40(9): 0928002

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Nov. 27, 2019

    Accepted: Jan. 17, 2020

    Published Online: May. 6, 2020

    The Author Email: Heyu Xu (1144152179@qq.com)

    DOI:10.3788/AOS202040.0928002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology