Airborne passive radiometer for high resolution soil moisture monitoring

用于高分辨率土壤湿度监测的机载无源辐射计

• 批准号: DP160104233
• 负责人: A/Prof Nemai Karmakar
• 金额: $ 47.1万
• 依托单位: Monash University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2016
• 资助国家: 澳大利亚
• 起止时间: 2016-04-22 至 2022-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP160104233
• 关键词: Airborne; passive; radiometer; resolution; soil

The project proposes to create a novel technology to measure soil moisture. Accurate knowledge of soil moisture profiles at high resolution is important for sustainable land and water management including efficient irrigation scheduling and cropping practices. A passive multi-band soil moisture-measuring radiometer at L-, Ku- and Ka-bands is proposed. The radiometer comprises a three-band shared aperture antenna array, a receiving electronics, a digital controller and a data logger. The array antenna comprises dual polarised stacked patch elements. Beamforming networks form agile beams to scan the ground. Sensitive radiometer receivers apply brightness temperature downscaling for high resolution. The high-resolution passive radiometer would revolutionise airborne soil moisture monitoring by removing the mechanically steerable bulky and heavy scanheads.

该项目提议创建一种测量土壤湿度的新技术。准确了解高分辨率土壤湿度剖面对于可持续土地和水资源管理（包括有效的灌溉计划和耕作实践）非常重要。提出了一种 L、Ku 和 Ka 波段无源多波段土壤湿度测量辐射计。该辐射计包括三频段共享孔径天线阵列、接收电子设备、数字控制器和数据记录器。阵列天线包括双极化堆叠贴片元件。波束形成网络形成灵活的波束来扫描地面。灵敏的辐射计接收器应用亮度温度降标以获得高分辨率。高分辨率无源辐射计将通过取消机械操纵的笨重扫描头来彻底改变机载土壤湿度监测。