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GENERAL DESCRIPTION
The IBIS-ArcSAR system is designed to remotely measure slow
displacements at an accuracy great as a tenth of a millimeter. The IBIS-
ArcSAR system is particularly suitable for terrain and structural monitoring
applications, it aims to detect quasi-static displacements over long time
periods.
The performance of the IBIS-ArcSAR system depends on the type of
configuration used and on the operative measurement conditions (above
all, related to the reflectivity of the area under investigation); however, the
best performance characteristics can be defined as follows:
For Ku band system:
maximum operational distance: 5 km;
field of view: 360°;
acquisition time: 40 seconds;
image resolution in distance: 0.75 m (EU/FCC limits);
angular resolution: 5 mrad (5 m at 1 km);
accuracy in measuring displacements in the viewing direction: 0.1
mm (for points with a good reflectivity – SNR > 50 dB – and
depending on the impact of atmospheric variation on the measure).
The IBIS-ArcSAR system offers the following advantages over the currently
available monitoring systems (GPS, total stations, extensometers):
IBIS-ArcSAR permits the operator to perform remote monitoring of the area
(remote sensing), without needing to access the area to install sensors or
optical targets;
IBIS-ArcSAR supplies a continuous displacement map of the entire area. It
measures simultaneously all the displacements of the entire area
illuminated by the antenna beam, which can cover over hundreds of
thousands of square meters;
IBIS-ArcSAR directly measures the displacements of the territory of interest
near real time;
IBIS-ArcSAR can be used both day and night, and in almost all weather
conditions;
IBIS-ArcSAR doesn’t require the continuous presence of an operator and
can be controlled by wireless connection.
This possibility of performing long distance monitoring, without needing to
install sensors signifies that investigations can be performed even when:
the area of interest is not accessible;
the area of interest is particularly large and would therefore require
many in situ sensors.
In addition, when the monitoring activity is required to assure personnel
safety in emergency situations, the possibility of performing remote
monitoring may be essential to protect lives.
show a view of the four side of IBIS-ArcSAR system. The basic
components are:
ArcSAR Acquisition Unit: made of Positioner, Radar Sensor, Antennas,
Pointing Camera, Panoramic Camera and GPS;
Positioner: it is device that allows the movement in azimuth
and tilt of sensor and the panoramic camera. The
movements are controlled by the Controller SW. The
