IBIS-L/S ground-based interferometric radar
The IBIS-L/S ground-based interferometric radar is a precise microwave measuring device used for remote, non-contact measurement of displacements and deformations of building structures and land surfaces with high accuracy. The main element of the system is a radar operating in the allowed Ku band (17.1-17.3 GHz), using the synthetic aperture technique (SAR). The radar emits a coherent beam of electromagnetic radiation of low power and stepwise variable frequency (SFCW modulation) towards the tested structure, and then receives, records and analyzes the reflected signal. The interferometric system precisely determines the phase changes of the reflected signal in relation to the transmitted signal, allowing the measurement of displacements of selected parts or areas (pixels) of the tested structure with an accuracy of 0.1 mm. Pixel resolution is achieved with a change of distance of 0.5 m and azimuth of 0.25°. The system includes specialized, dedicated software that allows for controlling the measurement process, archiving and initial analysis of results in real time, and then their full analysis in the post-processing phase. The results of individual stages of experiment can be presented graphically, recorded and exported to open file formats.
The formal conditions of access should be agreed with the Dean of the Faculty of Geo-Data Science, Geodesy and Environmental Engineering. Practically, due to the uniqueness of the equipment, its use requires training conducted by the manufacturer or the participation of a person with knowledge of the device operation.
-Detection and monitoring of land deformations and displacements of structures, detecting radial motion with an accuracy of 0.1 mm, unattainable for other geodetic methods.
-Deformation modeling of dams. Due to simultaneous thermovision observations, it is possible to separate thermal deformations from actual geometric deformations.
-Modeling and analysis deformations of engineering structures.
The accuracy of displacement measurement is 0.1 mm. The IBIS system has 2 versions:
- IBIS-L–long-range radar (up to 4 km) with two-dimensional resolution (0.5 m in distance and 0.25° in azimuth), intended for determining displacements of surface structures (e.g. landslides, dams).
- IBIS-S–radar with a range up to 1 km and sampling frequency of up to 200 Hz, intended for measurement and analysis of displacements and fast-changing structure vibrations.
Responsible body
Group / laboratory / team
Team of Information Technology Research in Civil Engineering