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首页> 外文期刊>International journal of remote sensing >Sensitivity study of Radarsat-2 polarimetric SAR to crop height and fractional vegetation cover of corn and wheat
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Sensitivity study of Radarsat-2 polarimetric SAR to crop height and fractional vegetation cover of corn and wheat

机译：Radarsat-2极化SAR对玉米和小麦作物高度和植被覆盖度的敏感性研究。

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摘要

Increasing studies have been conducted to investigate the potential of polarimetric synthetic aperture radar (SAR) in crop growth monitoring due to the capability of penetrating the clouds, haze, light rain, and vegetation canopy. This study investigated the sensitivity of 16 parameters derived from C-band Radarsat-2 polarimetric SAR data to crop height and fractional vegetation cover (FVC) of corn and wheat. The insitu measured crop height and FVC were collected from 29 April to 30 September 2013, at the study site in southwest Ontario, Canada. A total of 10 Radarsat-2 polarimetric SAR images were acquired throughout the same growing season. It was observed that at the early growing stage, the corn height was strongly correlated with the SAR parameters including HV (R-2 = 0.88), HH-VV (R-2 = 0.84), and HV/VV (R-2 = 0.80), and the corn FVC was significantly correlated with HV (R-2 = 0.79) and HV/VV (R-2 = 0.92), but the correlation became weaker at the later growing stage. The sensitivity of the SAR parameters to wheat variables was very low and only HV and Yamaguchi helix scattering showed relatively good but negative correlations with wheat height (R-2 = 0.57 and R-2 = 0.39) at the middle growing stage. These findings indicated that Radarsat-2 polarimetric SAR (C-band) has a great potential in crop height and FVC estimation for broad-leaf crops, as well as identifying the changes in crop canopy structures and phenology.
机译：由于能够穿透云层，霾，小雨和植被冠层的能力，已经开展了越来越多的研究来研究极化合成孔径雷达（SAR）在作物生长监测中的潜力。这项研究调查了从C波段Radarsat-2极化SAR数据得出的16个参数对玉米和小麦的作物高度和部分植被覆盖度（FVC）的敏感性。 2013年4月29日至9月30日在加拿大安大略省西南部的研究地点收集了实测的作物高度和FVC。在同一生长季节共采集了10张Radarsat-2极化SAR图像。观察到，在生育早期，玉米高度与SAR参数密切相关，包括HV（R-2 = 0.88），HH-VV（R-2 = 0.84）和HV / VV（R-2 = 0.80），玉米FVC与HV（R-2 = 0.79）和HV / VV（R-2 = 0.92）显着相关，但在后期生长阶段相关性变弱。 SAR参数对小麦变量的敏感性非常低，只有HV和Yamaguchi螺旋散射在中部生长阶段显示出相对良好的但与小麦高度呈负相关（R-2 = 0.57和R-2 = 0.39）。这些发现表明Radarsat-2极化SAR（C波段）在阔叶作物的作物高度和FVC估算以及确定作物冠层结构和物候变化方面具有巨大潜力。

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  • 来源
    《International journal of remote sensing》 |2018年第6期|1475-1490|共16页
  • 作者

    Liao Chunhua; Wang Jinfei; Shang Jiali; Huang Xiaodong; Liu Jiangui; Huffman Ted;

  • 作者单位

    Univ Western Ontario, Dept Geog, London, ON N6A 5C2, Canada;

    Univ Western Ontario, Dept Geog, London, ON N6A 5C2, Canada;

    Agr & Agri Food Canada, Sci & Technol Branch, Ottawa, ON, Canada;

    Univ Western Ontario, Dept Geog, London, ON N6A 5C2, Canada;

    Agr & Agri Food Canada, Sci & Technol Branch, Ottawa, ON, Canada;

    Agr & Agri Food Canada, Sci & Technol Branch, Ottawa, ON, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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