نتایج جستجو برای: moisture sensors

تعداد نتایج: 132431  

Journal: :Remote Sensing 2017
Nicolas Baghdadi Mohammad El-Hajj Mehrez Zribi Safa Bousbih

In a perspective to develop an inversion approach for estimating surface soil moisture of crop fields from Sentinel-1/2 data (radar and optical sensors), the Water Cloud Model (WCM) was calibrated from C-band Synthetic Aperture Radar (SAR) data and Normalized Difference Vegetation Index (NDVI) values collected over crops fields and grasslands. The soil contribution that depends on soil moisture...

Journal: :Processes 2022

Agricultural productivity plays a vital role in country’s economy, which can be increased by providing the proper water needed for crops. Proper provision ensures suitable moisture and appropriate conditions essential crops, resource preservation, minimized wastage, energy consumption. However, adequate is challenging due to intermittent uncertain environmental weather conditions. On this note,...

2007
Janet E. Simms

The attention given the natural geologic background of a site and its influence on geophysical sensors has grown considerably over the past several years, primarily because of the governmentsupported unexploded ordnance (UXO) technology demonstrations and government mandated UXO cleanup activities. Explosive and ordnance detection (EOD) teams have encountered difficulties at sites thought to be...

2011
Chris Hunt Owen Thomas Martin Wickham

High levels of residual moisture in PCBs are problematic and can result in delamination during soldering and rework. Moisture accumulates during storage and industry practice recommends specific levels of baking to avoid delamination. This paper will discuss the use of capacitance measurements to follow the absorption and desorption behaviour of moisture. The PCB design used in this work, focus...

2009
T. Blume

Spatial patterns as well as temporal dynamics of soil moisture have a major influence on runoff generation. The investigation of these dynamics and patterns can thus yield valuable information on hydrological processes, especially in data scarce or previously ungauged catchments. The combination of spatially scarce but temporally high resolution soil moisture profiles with episodic and thus tem...

2010
Binayak P. Mohanty

Soil moisture is a key state variable of the hydrologic cycle. It plays a significant role in many hydrological, meteorological and other natural processes in the land-atmosphere continuum. In the past two decades we have conducted several field campaigns to better understand the underlying processes controlling the spatio-temporal variations of soil moisture using multiple ground, air, and spa...

2007
I. Gherboudj M. Bernier M. Melis A. Soddu

There is a strong interest in assessing the potential of space-based monitoring and mapping of state variables that are critical to hydrological and agricultural applications. Our study consists of the acquisition of ASAR imagery in single and alternating polarization modes and at different incidence angles over the Campidano plain in south-central Sardinia (Italy), the island's most important ...

2017
Tianjie Zhao Jiancheng Shi Mingsen Lin Xiaojun Yin Yong Liu Huimin Lan Chuan Xiong

The Chinese HY-2, a satellite designed for ocean dynamic environment monitoring, was launched on August 16, 2011. The onboard scanning microwave radiometer (RM) is primarily designed for sea surface temperature and wind speed mapping. However, our objective of this investigation is to exploit the large amount of land observations of RM and to extend the mission scope to the retrieval of surface...

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