ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
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inside of a separate polyethylene body and connected to the FP/mts feeder cable<br />
from outside.<br />
The FP/mts/m mobile probe has been thought to provide with the ground-truth<br />
reference data for calibration and/or verification of the multispectral satellite<br />
<strong>im</strong>ages in terms of water content of the soil surface layer.<br />
Concerning the FP/mts/m mobile probe the thermometer, if not needed, can<br />
be detached. Length of the mobile probe body, L, is up to the user convenience.<br />
L = 70 cm is suggested.<br />
Fig. 63.<br />
A near-surface probe FP/mts/ns<br />
The approx<strong>im</strong>ate region of influence of the FP probe, defined as a solid<br />
beyond of that changes in water content do not markedly affect readings of water<br />
content is presented in Fig. 64.<br />
Features of the FP probes for soil water content, salinity and temperature<br />
measurement developed in IAPAS, Lublin:<br />
• Sensor: a section of a transmission line made of two, 100 mm long<br />
parallel stainless steel rods having 2 mm diameter and separated by 16<br />
mm<br />
• Sensor support: a section of a PVC tube having 2 cm outer diameter and<br />
optional length (15 cm - 150 cm or longer) dependent on the intended<br />
depth of the sensor installation<br />
• Cable length: 6 m from the sensor to the BNC terminating connector<br />
• Region of influence: a cylinder having approx<strong>im</strong>ated diameter of 5 cm<br />
and height of 11 cm, circumferenced around the sensor rods.<br />
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