Abstract
The design and development of a wireless sensor network for soil moisture measurement in an unlevelled 10 km × 10 km area, is described. It was specifically deployed for the characterization of a reference area, in campaigns of calibration and validation of the space mission SMOS (Soil Moisture and Ocean Salinity), but the system is easily extensible to monitor other climatic or environmental variables, as well as to other regions of ecological interest. The network consists of a number of automatic measurement stations, strategically placed following soil homogeneity and land uses criteria. Every station includes acquisition, conditioning and communication systems. The electronics are battery operated with the help of solar cells, in order to have a total autonomous system. The collected data is then transmitted through long radio links, with ling ranges above 8 km. A standard PC linked to internet is finally used in order to control the whole network, to store the data, and to allow the remote access to the real-time data.
Highlights
Ground humidity and its space-temporal evolution are very important in climatic and prediction models and they must be taken into account in the monitoring of the hydrology and the vegetation
The design and development of a wireless sensor network for soil moisture measurement in an unlevelled 10 km × 10 km area, is described. It was deployed for the characterization of a reference area, in campaigns of calibration and validation of the space mission SMOS (Soil Moisture and Ocean Salinity), but the system is extensible to monitor other climatic or environmental variables, as well as to other regions of ecological interest
This paper describes the design, development and implementation of an automated wireless network of soil moisture sensors using a network technology over a homogeneous area of 10 km × 10 km that is used in SMOS
Summary
Ground humidity and its space-temporal evolution are very important in climatic and prediction models and they must be taken into account in the monitoring of the hydrology and the vegetation In this sense, soil moisture maps are very powerful tools that can be used in a huge range of applications, like desertification studies and, indirectly, global climate change studies [1]. The Soil Moisture and Ocean Salinity (SMOS) space mission from the European Space Agency (ESA) [2,3] launched a mini satellite November the 2nd, 2009, with first data received November 20th. This satellite is equipped with an L-band microwave interferometric radiometer.
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