Radar Interferometry is the acquisition and interpretation of radar images to measure movement of the ground and structures for a variety of applications:
- Retrospective analysis - utilise data acquired by satellite since 1992 to identify historic movements.
- Long term deformation trend analysis over large areas (unlimited target size).
- Remote sensing eliminates safety and restrictive site access issues and allows immediate start to monitoring.
- High density of data points can be acquired providing flexibility to monitoring programme.
- Obtain valuable historic data to inform current and future engineering decisions; resolve long running disputes / claims.
- Radar data can be displayed on GIS and combined with other survey / monitoring data.
Satellite Synthetic Aperture Radar Interferometry (InSAR) can be used to establish long term trends of movement, both historic and continuous, at approximately weekly monitoring intervals. It is an ideal technique for asset protection monitoring where operational requirements and / or safety issues prevent regular on-the-ground site access, such as:
- Restricted sites - railways, roads, bridges, ports, runways, buildings.
- Dynamically loaded targets - bridges, dams, slopes.
- Large target areas - reclaimed land, regional studies, asset protection.