UAS-based P-band signals of opportunity for remote sensing of snow and root zone soil moisture
UAS-based P-band signals of opportunity for remote sensing of snow and root zone soil moisture
复制标题
基于 UAS 的 P 波段机会信号，用于遥感雪和根区土壤湿度
DOI：
10.1117/12.2325819
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Jack Elston
中科院分区：
文献类型：
--
作者：
S. Yueh;R. Shah;Xiaolan Xu;K. Elder;S. Margulis;G. Liston;M. Durand;C. Derksen;Jack Elston
我们开发了基于无人机系统（UAS）的P波段机会信号（SoOp）传感器，用于遥感雪水当量（SWE）和根区土壤湿度（RZSM）。用于水文的P波段无人机系统SoOp传感器（UASHydro）将在Black Swift Technologies开发的S2飞机上运行，用于以约10米的空间分辨率感测SWE和RZSM。根区土壤含水量和地面积雪蓄水量是水分循环的关键参数。我们发展的长期目标是使用小型无人机系统对两个关键水文测量进行区域高分辨率观测，以改善对陆地水储存的估计，用于水管理、作物生产和自然灾害预报。UASHydro概念利用无源接收器探测美国海军发射的地球静止移动的使用目标系统（MUOS）通信卫星在360-380 MHz频段上的强现有P波段无线电信号的反射。使用P波段SoOp的SWE遥感测量原理是基于无线电信号通过积雪的传播延迟（或相位变化）。由于积雪相对于无雪条件的反射信号的时间延迟与积雪SWE成正比，而土壤水分可以从MUOS的P波段频率的反射率中检索。自2016年2月以来，我们一直在科罗拉多的弗雷泽实验森林进行地面活动，以测试仪器和数据处理方法。现场活动数据为测量概念提供了支持。为了在UAS上安装SoOp技术，已经建造了一个轻型天线，并完成了与Black Swift Technologies建造的S2的接口。计划从2018年4月开始到2018年底在科罗拉多进行一系列飞行。
We have developed the P-band Signals of Opportunity (SoOp) sensor based on the Unmanned Aircraft System (UAS) to remotely sense Snow Water Equivalent (SWE) and Root Zone Soil Moisture (RZSM). The P-band UAS SoOp sensor for Hydrology (UASHydro) would operate on the S2 aircraft developed by Black Swift Technologies for sensing of SWE and RZSM with a spatial resolution of about 10m. Root-zone soil moisture and snow water storage in land are critical parameters of the water cycle. The long-term goal of our development would be to use small UAS to perform regional high resolution observation of two key hydrological measurements to improve the estimation of terrestrial water storage for water management, crop production and forecasts of natural hazard. The UASHydro concept utilizes passive receivers to detect the reflection of strong existing P-band radio signals at the 360-380 MHz band from geostationary Mobile Use Objective System (MUOS) communication satellites launched by the US Navy. The SWE remote sensing measurement principle using the P-band SoOp is based on the propagation delay (or phase change) of radio signals through the snowpack. The time delay of the reflected signal due to the snowpack with respect to snow-free conditions is directly proportional to the snowpack SWE, while the soil moisture can be retrieved from the reflectivity at the P-band frequencies for MUOS. We have been conducting ground-based campaigns to test the instrumentation and data processing methods at the Fraser Experimental Forest in Colorado since February 2016. The field campaign data has provided support to the measurement concept. To install the SoOp technologies on the UAS, a lightweight antenna has been built and interfaces with the S2 built by Black Swift Technologies have been completed. A set of flights have been planned starting April 2018 through the end of 2018 in Colorado.