Demonstrating soil moisture remote sensing with observations from the UK TechDemoSat-1 satellite mission
Demonstrating soil moisture remote sensing with observations from the UK TechDemoSat-1 satellite mission
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DOI：
10.1002/2016gl068189
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发表时间：
2016-04-16
影响因子：
5.2
通讯作者：
Mannucci, Anthony J.
中科院分区：
文献类型：
--
作者：
Chew, Clara;Shah, Rashmi;Mannucci, Anthony J.
利用近地轨道英国TechDemoSat-1卫星（TDS-1）的观测资料，研究了星载全球导航卫星系统（GNSS）双基地雷达接收机感知土壤湿度变化的能力。先前使用飞机或发射塔接收器的研究表明，地面反射的GNSS信号对土壤湿度的变化很敏感，尽管从太空感知这一变量的能力尚未量化。TDS-1的数据表明，反射信号对土壤湿度的时间变化的灵敏度为7 dB。如果可以量化地表粗糙度和植被对反射信号的影响，星载GNSS双基地雷达接收机可以在相对小的时空尺度上提供土壤水分。
The ability of spaceborne Global Navigation Satellite System(GNSS) bistatic radar receivers to sense changes in soil moisture is investigated using observations from the low Earth orbiting UK TechDemoSat-1 satellite (TDS-1). Previous studies using receivers on aircraft or towers have shown that ground-reflected GNSS signals are sensitive to changes in soil moisture, though the ability to sense this variable from space has yet to be quantified. Data from TDS-1 show a 7 dB sensitivity of reflected signals to temporal changes in soil moisture. If the effects of surface roughness and vegetation on the reflected signals can be quantified, spaceborne GNSS bistatic radar receivers could provide soil moisture on relatively small spatial and temporal scales.