Remote Sensing Technology and Application, Volume. 39, Issue 2, 269(2024)

Brief Review on Polarimetric SAR Systems and Polarimetric Calibration Accuracies

Li TAO1、* and Shengjie QU2
Author Affiliations
  • 1Hefei Normal University,Hefei 230601,China
  • 2China Electronics Technology Group Corporation No. 38 Research Institute,Hefei 230088,China
  • show less
    Figures & Tables(10)
    • Table 1. The accuracy requirements for SAR radiometric calibration

      View table
      View in Article

      Table 1. The accuracy requirements for SAR radiometric calibration

      地球物理参数测量精度校正精度需求/dB
      绝对精度相对精度(短期)相对精度(长期)
      冰层分类(3类,冬季)分类正确率> 80%2.00.52.0
      冰层运动匹配正确率> 95%/0.5/
      积雪场水分平衡假设深度 > 20 cm1.01.01.0

      海洋风速

      波浪高度

      波浪能量

      < 20%

      系统传递函数

      < 5%

      1.0

      1.0

      1.0

      1.0

      1.0

      1.0

      1.0

      1.0

      1.0

      土壤湿度每个水平具有20% 变化1.0<0.51.0
      表面粗糙度/1.0//
      植被测绘/监测

      生物量密度<25%

      叶面积指数±0.5 0~2

      1.0

      1.0

      <0.5

      <0.5

      0.5

      0.5

      熔岩流年代3个年代分类的正确率3.01.01.0
    • Table 2. The calibration accuracy of E-SAR/ F-SAR

      View table
      View in Article

      Table 2. The calibration accuracy of E-SAR/ F-SAR

      项目E-SARF-SAR
      串扰< -30 dBX波段:-32 dB;S波段:-37 dB
      相位< 10°/
      绝对辐射< 3 dB/
      相对辐射< 1 dBX-、S-波段:<0.3 dB
    • Table 3. The calibration accuracy of EMISAR

      View table
      View in Article

      Table 3. The calibration accuracy of EMISAR

      项目精度
      串扰校正<-35 dB
      天线校正天线方向图:0.1 dB;天线绝对增益:0.2 dB
      内定标绝对校正C波段:优于±0.1 dB;L波段:优于±0.5 dB
      极化通道平衡幅度:优于±0.4 dB;相位:优于±10°
      系统绝对校正优于±1 dB
    • Table 4. PLIS calibration accuracy and its comparison with Pi-SAR2, UAVSAR

      View table
      View in Article

      Table 4. PLIS calibration accuracy and its comparison with Pi-SAR2, UAVSAR

      项目PLISPi-SAR-L2UAVSAR目标
      幅度不平衡/dB0.17±0.15;0.22(RMS)0.09±0.10.17(RMS)0.4
      相位不平衡/°3.87±2.86;4.81(RMS)1.36±2.145.3(RMS)5
      串扰(PRC)/dB-27.58±1.02<-32-30-30
      串扰(自然目标)/dB-30.55±1.01-38.62
      辐射校正精度/dB0.58(RMS)1.61(1sigma)0.7(RMS)1
      0.82(1sigma)
    • Table 5. The calibration accuracy of SIR-C/X-SAR

      View table
      View in Article

      Table 5. The calibration accuracy of SIR-C/X-SAR

      项目精度
      长/短期相对校正±1 dB
      绝对校正±3 dB
      交叉频率校正±1.5 dB
      通道不平衡校正幅度±0.4 dB(2向); 相位±10°(2向)
      极化串扰误差-30 dB
    • Table 6. The calibration accuracy of TerraSAR-X

      View table
      View in Article

      Table 6. The calibration accuracy of TerraSAR-X

      项目目标2007试运行2009再校正
      内定标幅度0.05 dB< 0.05 dB< 0.05 dB
      内定标相位0.7°< 0.7°< 0.9°
      辐射稳定性0.5 dB0.2 dB0.15 dB
      相对辐射精度0.68 dB< 0.3 dB0.18 dB
      绝对辐射精度0.9 dB< 0.6 dB0.39 dB
      通道相位不平衡//≤±1.2°
      通道幅度不平衡//≤0.03 dB
      串扰(共-交叉极化)//≤-24.9 dB
      串扰(交叉-交叉极化)//≤-42.0 dB
    • Table 7. The calibration accuracy of RadarSat-1/2

      View table
      View in Article

      Table 7. The calibration accuracy of RadarSat-1/2

      项目成像模式RadarSat-1RadarSat-2

      相对辐射

      校正

      宽波束模式0.59 dB0.75 dB
      标准模式0.48 dB0.53 dB
      精细模式0.34 dB0.38 dB
      多视精细模式/0.37 dB
      超精细模式/0.37 dB
      全极化模式/0.43 dB
      超高波束模式0.57 dB0.38 dB
      极化校正交叉极化串扰/-40 dB
      通道间相位0.2°
      通道间幅度0.02 dB0.3 dB
    • Table 8. The Mean NRCS Residual

      View table
      View in Article

      Table 8. The Mean NRCS Residual

      NRCS残留误差WV1/dBWV2/dB
      ESA校正0.254 1-0.605 2
      雨林数据校正-0.024 1-0.164 2
      海面数据校正-0.016 9-0.035 2
    • Table 9. Biomass key performance parameters

      View table
      View in Article

      Table 9. Biomass key performance parameters

      项目精度
      极化串扰≤-30 dB
      辐射误差≤0.3 dB
      辐射稳定性≤0.5 dB
      噪声等效西格玛零≤-27 dB
    • Table 10. The calibration accuracy of SAOCOM-1A

      View table
      View in Article

      Table 10. The calibration accuracy of SAOCOM-1A

      项目目标/dB测量结果/dB
      极化串扰精度-32<-40
      极化通道不平衡精度0.30.22
      相对辐射精度0.30.15
      绝对辐射精度0.50.28
    Tools

    Get Citation

    Copy Citation Text

    Li TAO, Shengjie QU. Brief Review on Polarimetric SAR Systems and Polarimetric Calibration Accuracies[J]. Remote Sensing Technology and Application, 2024, 39(2): 269

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Research Articles

    Received: Jun. 4, 2022

    Accepted: --

    Published Online: Aug. 13, 2024

    The Author Email: TAO Li (4287390@qq.com)

    DOI:10.11873/j.issn.1004-0323.2024.2.0269

    Topics