• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Relationships of S-Band Radar Backscatter and Forest Aboveground Biomass in Different Forest Types
【2h】

Relationships of S-Band Radar Backscatter and Forest Aboveground Biomass in Different Forest Types

机译：不同森林类型S波段雷达反向散射与森林地上生物量的关系

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Synthetic Aperture Radar (SAR) signals respond to the interactions of microwaves with vegetation canopy scatterers that collectively characterise forest structure. The sensitivity of S-band (7.5–15 cm) backscatter to the different forest types (broadleaved, needleleaved) with varying aboveground biomass (AGB) across temperate (mixed, needleleaved) and tropical (broadleaved, woody savanna, secondary) forests is less well understood. In this study, Michigan Microwave Canopy Scattering (MIMICS-I) radiative transfer model simulations showed strong volume scattering returns from S-band SAR for broadleaved canopies caused by ground/trunk interactions. A general relationship between AirSAR S-band measurements and MIMICS-I simulated radar backscatter with forest AGB up to nearly 100 t/ha in broadleaved forest in the UK was found. Simulated S-band backscatter-biomass relationships suggest increasing backscatter sensitivity to forest biomass with a saturation level close to 100 t/ha and errors between 37 t/ha and 44 t/ha for HV and VV polarisations for tropical ecosystems. In the near future, satellite SAR-derived forest biomass from P-band BIOMASS mission and L-band ALOS-2 PALSAR-2 in combination with S-band UK NovaSAR-S and the joint NASA-ISRO NISAR sensors will provide better quantification of large-scale forest AGB at varying sensitivity levels across primary and secondary forests and woody savannas.
机译：合成孔径雷达（SAR）信号响应微波与集体表征森林结构的植被冠层散射体之间的相互作用。在温带（混合，针叶）和热带（阔叶，木本稀树草原，次生）森林中，具有不同地上生物量（AGB）的不同森林类型（宽叶，针叶）的S带（7.5–15 cm）后向散射的敏感性较小。非常明白。在这项研究中，密歇根州微波冠层散射（MIMICS-I）辐射传递模型仿真显示，由于地面/树干相互作用，宽叶冠层的S带SAR有很强的体积散射返回。在英国阔叶林中，发现AirSAR S波段测量值与MIFICS-I模拟雷达背向散射（森林AGB高达近100吨/公顷）之间的一般关系。模拟的S波段背向散射-生物量关系表明，对森林生物量的背向散射敏感性增加，饱和水平接近100 t / ha，热带生态系统的HV和VV极化误差在37 t / ha和44 t / ha之间。在不久的将来，来自P波段BIOMASS任务和L波段ALOS-2 PALSAR-2的卫星SAR衍生的森林生物量，结合S波段UK NovaSAR-S和NASA-ISRO NISAR联合传感器，将提供更好的量化大型森林AGB，在原始和次生森林以及木质稀树草原上具有不同的敏感性水平。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号