It’s been taken into account the evaluation of the temperature sensors and soil moisture on the market, choosing a type of sensor that meets the needs of the project, and their acquiring the related equipment for testing and calibration laboratory engaged prior installation and integration with existing weather stations, installation, testing and calibration in-situ. It was established the structure (schema - block) for mobile stations, following hardware design, software design, assembly, laboratory testing and in-situ field installation.
In order to select the most suitable locations, the following criteria and information had been taken into consideration:
All of the 20 proposed station are operational
Coordinates | |||
---|---|---|---|
ID | Name | Lon | Lat |
15479 | Adamclisi | 27.96591288 | 44.08828906 |
15489 | Alexandria | 25.35286364 | 43.97780601 |
15197 | Barlad | 27.64438367 | 46.2331338 |
15460 | Calarasi | 27.3385146 | 44.20572207 |
15136 | Chisineu Cris | 21.54177115 | 46.51867633 |
15408 | Corugea | 28.34225398 | 44.73444284 |
15056 | Cotnari | 26.92545711 | 47.35829844 |
15000 | Darabani | 26.5732519 | 48.19477108 |
15083 | Dej | 23.8989254 | 47.12795904 |
15189 | Dumbraveni | 24.59160604 | 46.22786185 |
15080 | Oradea | 21.89611975 | 47.03580162 |
15470 | Rosiorii de Vede | 24.97871777 | 44.10711102 |
15199 | Sannicolau Mare | 20.60158621 | 46.07155688 |
15010 | Satu Mare | 22.88736848 | 47.72144328 |
15425 | Slobozia | 27.38372843 | 44.55277587 |
15265 | Tecuci | 27.4090074 | 45.84164072 |
15090 | Iasi | 27.62545609 | 47.16314699 |
15434 | Slatina | 24.35445532 | 44.44211128 |
15289 | Banloc | 21.1362639 | 45.3829027 |
15412 | Bacles | 23.11289872 | 44.4761669 |
At the existing weather stations location the 5TM probes will be interfaced with the existing automatic weather station data loggers (Vaisala/Logotronic).
Fixed Station Scheme
GIS databases used for mapping
Mobile Station Scheme
The mobile stations are built around the Arduino Uno board fitted with a GSM shield, for communication and powered by a solar panel and battery. One 5TM Decagon sensor is used at a depth of 0-5 cm.
Is meant to allow for easy reconfiguration of the soil moisture network depending upon the satellite product to be validated. 30 autonomous mobile stations will be deployed in different areas according to the scheme below.
Within the ASSIMO project, for the automatic measuring of the volumetric soil moisture the Decagon 5TM sensor is used, created by Decagon Devices, which corresponds the criteria.
The 5TM Decagon transducer is a precise instrument for monitoring the volumetric content of water and that of soil temperature. It determines the volumetric soil moisture through measuring the dielectric constant using the capacitive method (Frequency Domain Reflectometry).
The advantages of using the 5TM transducer:
At the existing weather stations location the 5TM probes will be interfaced with the existing automatic weather station data loggers (Vaisala/Logotronic).
The Olimexino328 development platform
The electric scheme of the Data logger for soil moisture and temperature
In the scheme are shown all of the connections between modules and between the transducer and the development platform.