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Acta Optica Sinica, Volume. 39, Issue 11, 1130003(2019)

Radiation Calibration Accuracy Assessment of FY-3D Hyperspectral Infrared Atmospheric Sounder Based on Inter-Comparison

Tianhang Yang1,2,3, Xiuqing Hu4、*, Hanlie Xu4, Chunqiang Wu4, Chengli Qi4, and Mingjian Gu1,3
Author Affiliations
  • 1Key Laboratory of Infrared System Detection and Imaging Technology, Chinese Academy of Sciences, Shanghai 200083, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • 4Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center, Beijing 100081, China
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    Figures & Tables(16)
    Inter-comparison processes of HIRAS and IASI

    Fig. 1. Inter-comparison processes of HIRAS and IASI

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    Long-term latitude distributions of SNO events of HIRAS-IASI/A and HIRAS-IASI/B. (a) Latitude distribution of SNO events of HIRAS-IASI/A and HIRAS-IASI/B from April to December, 2018; (b) latitude distribution of SNO events of HIRAS-IASI/A during 10-12 June, 2018

    Fig. 2. Long-term latitude distributions of SNO events of HIRAS-IASI/A and HIRAS-IASI/B. (a) Latitude distribution of SNO events of HIRAS-IASI/A and HIRAS-IASI/B from April to December, 2018; (b) latitude distribution of SNO events of HIRAS-IASI/A during 10-12 June, 2018

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    Pixel overlap rate of HIRAS-IASI versus pixel distance between HIRAS and IASI (nadir)

    Fig. 3. Pixel overlap rate of HIRAS-IASI versus pixel distance between HIRAS and IASI (nadir)

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    Pixel matching of MERSI-II and HIRAS-IASI

    Fig. 4. Pixel matching of MERSI-II and HIRAS-IASI

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    BT difference at 900 cm-1 between HIRAS and IASI/A versus ratio of standard deviation to mean of MERSI-II in channel 24 (ratio is below 0.01). The mean of HIRAS-IASI/A BT difference is 0.106 K and the standard deviation of BT difference is 0.485 K

    Fig. 5. BT difference at 900 cm-1 between HIRAS and IASI/A versus ratio of standard deviation to mean of MERSI-II in channel 24 (ratio is below 0.01). The mean of HIRAS-IASI/A BT difference is 0.106 K and the standard deviation of BT difference is 0.485 K

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    Matching of HIRAS-IASI spectra. (a) HIRAS (solid line) and IASI (dash line) spectra simulated by LBLRTM for standard atmospheric profile; (b) BT difference between IASIH and HIRAS

    Fig. 6. Matching of HIRAS-IASI spectra. (a) HIRAS (solid line) and IASI (dash line) spectra simulated by LBLRTM for standard atmospheric profile; (b) BT difference between IASIH and HIRAS

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    Spatial distributions of matching samples of HIRAS-IASI/A and HIRAS-IASI/B

    Fig. 7. Spatial distributions of matching samples of HIRAS-IASI/A and HIRAS-IASI/B

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    Spectral distribution, mean deviation of BT, and standard deviation of BT difference for HIRAS-IASI/A and HIRAS-IASI/B(North and South Arctic regions). (a) HIRAS spectral distributions for HIRAS-IASI/A and HIRAS-IASI/B, the solid line represents the mean of BT(dark); (b) BT mean deviation of HIRAS-IASI/A and HIRAS-IASI/B; (c) standard deviation of BT differences of HIRAS-IASI/A and HIRAS-IASI/B

    Fig. 8. Spectral distribution, mean deviation of BT, and standard deviation of BT difference for HIRAS-IASI/A and HIRAS-IASI/B(North and South Arctic regions). (a) HIRAS spectral distributions for HIRAS-IASI/A and HIRAS-IASI/B, the solid line represents the mean of BT(dark); (b) BT mean deviation of HIRAS-IASI/A and HIRAS-IASI/B; (c) standard deviation of BT differences of HIRAS-IASI/A and HIRAS-IASI/B

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    Mean deviation of BT for HIRAS-IASI/A and HIRAS-IASI/B versus mean of HIRAS BT. (a)(b) LWIR; (c)(d) MWIR; (e)(f) SWIR

    Fig. 9. Mean deviation of BT for HIRAS-IASI/A and HIRAS-IASI/B versus mean of HIRAS BT. (a)(b) LWIR; (c)(d) MWIR; (e)(f) SWIR

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    Scatter plots of HIRAS-IASI/A BT differences versus HIRAS BT. (a) 678.125 cm-1; (b) 900.0 cm-1; (c) 1500.0 cm-1; (b) 2157.5 cm-1

    Fig. 10. Scatter plots of HIRAS-IASI/A BT differences versus HIRAS BT. (a) 678.125 cm-1; (b) 900.0 cm-1; (c) 1500.0 cm-1; (b) 2157.5 cm-1

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    Scatter plots of HIRAS-IASI/B BT differences versus HIRAS BT. (a) 678.125 cm-1; (b) 900.0 cm-1; (c) 1500.0 cm-1; (b) 2157.5 cm-1

    Fig. 11. Scatter plots of HIRAS-IASI/B BT differences versus HIRAS BT. (a) 678.125 cm-1; (b) 900.0 cm-1; (c) 1500.0 cm-1; (b) 2157.5 cm-1

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    Long-term sequences of BT differences of HIRAS-IASI/A in LWIR. (a) 750.00 cm-1; (b) 800.00 cm-1; (c) 950.00 cm-1

    Fig. 12. Long-term sequences of BT differences of HIRAS-IASI/A in LWIR. (a) 750.00 cm-1; (b) 800.00 cm-1; (c) 950.00 cm-1

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    Long-term sequences of BT differences of HIRAS-IASI/A in MWIR. (a) 1300.00 cm-1; (b) 1500.00 cm-1; (c) 1700.00 cm-1

    Fig. 13. Long-term sequences of BT differences of HIRAS-IASI/A in MWIR. (a) 1300.00 cm-1; (b) 1500.00 cm-1; (c) 1700.00 cm-1

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    Long-term sequences of BT differences of HIRAS-IASI/A in SWIR. (a) 2200.00 cm-1; (b) 2400.00 cm-1; (c) 2500.00 cm-1

    Fig. 14. Long-term sequences of BT differences of HIRAS-IASI/A in SWIR. (a) 2200.00 cm-1; (b) 2400.00 cm-1; (c) 2500.00 cm-1

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    • Table 1. Instrument parameter characteristics of HIRAS and IASI

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      Table 1. Instrument parameter characteristics of HIRAS and IASI

      Instrument parameter characteristicHIRASIASI
      Satellite platformFY-3DMetOp-AMetOp-B
      Launch date2017-11-152006-10-192012-09-17
      Orbit height /km830.5817.0
      Local equatorial13:4009:30
      Spatial resolution(nadir) /km16.012.0
      Scan cycle /s108
      Detector array2×22×2
      Maximum optical path difference/cm0.82
      Spectral sampling resolution /cm-10.6250.25
      Apodized spectral resolution /cm-11.13750.5
      Number of channels2287 (non-apodized)2275(apodized)8461(apodized)
      Spectral coverage /μm15.38-8.80(LWIR)8.26-5.70(MWIR)4.64-3.92(SWIR)15.5-8.26(LWIR)8.26-5.00(MWIR)5.00-3.62(SWIR)

    • Table 2. Matching criteria for SNOs of HIRAS-IASI

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      Table 2. Matching criteria for SNOs of HIRAS-IASI

      ConditionCriteria
      FOV distance /km≤7
      Time difference /min≤10
      View angle difference|cos Zen1/cos Zen2|≤0.01
      FOV homogeneitySTDE/MEANE<0.01|MEANT-MEANE|<k·STDE
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    Tianhang Yang, Xiuqing Hu, Hanlie Xu, Chunqiang Wu, Chengli Qi, Mingjian Gu. Radiation Calibration Accuracy Assessment of FY-3D Hyperspectral Infrared Atmospheric Sounder Based on Inter-Comparison[J]. Acta Optica Sinica, 2019, 39(11): 1130003

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    Paper Information

    Category: Spectroscopy

    Received: Jun. 20, 2019

    Accepted: Jul. 24, 2019

    Published Online: Nov. 6, 2019

    The Author Email: Hu Xiuqing (huxq@cma.gov.cn)

    DOI:10.3788/AOS201939.1130003

    Topics

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