Microwave remote sensing soil moisture monitoring system and method thereof

Abstract

The invention discloses a microwave remote sensing soil moisture monitoring system and a method thereof. The system comprises a soil moisture and ocean salinity (SMOS) satellite, a ground satellite receiving station, a data processing system, a global navigation satellite system (GNSS) signal source, a global navigation satellite system-reflection (GNSS-R) receiver, a mobile platform and a platform control system, wherein the SMOS satellite passively receives an L-band microwave signal transmitted by the earth surface, processes the signal through the data processing system and transmits the processed signal to a data analysis processing system; the GNSS-R receiver receives a GNSS direct signal and a forward scattered signal which is reflected by the ground and contains ground object information, and transmits the two signals to the data analysis processing system; and the data analysis processing system performs precision evaluation and inversion algorithm verification on soil moisture information. The ground real-time synchronous data acquired by the GNSS-R receiver is applied to precision evaluation and inversion algorithm verification of an SMOS soil moisture model of a passive microwave sensor so as to realize multi-scale and active and passive combined microwave remote sensing soil moisture monitoring.

Description

technical field [0001] The invention relates to a soil moisture monitoring system, in particular to a microwave remote sensing soil moisture monitoring system and a method thereof. Background technique [0002] An important parameter in the fields of hydrology, meteorology, and agricultural science research is soil moisture, which also plays a very important role in today's agricultural development. Large-scale soil moisture monitoring and inversion is an important part of agricultural research and ecological environment assessment. The inversion of soil water environment on a regional or global scale is one of the essential parameters in the study of land surface process models. Therefore, remote sensing monitoring and inversion of soil moisture is an important topic of scientific research today. [0003] Microwave remote sensing can be divided into active microwave remote sensing and passive microwave remote sensing. Passive microwave remote sensing to monitor soil mois...

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Problems solved by technology

[0004] However, the main method of the existing small-scale real-time synchronization verification method is to install the corresponding microwave sensors on the ground or on the airborne remote sensing platform such as UAV. Due to the high cost of the sensors, it causes a waste of manpower and financial resources.

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