InSAR uses radar satellites to measure subsidence. Although it is a high-tech method to measure deformation, it’s principles are fairly simple and is becoming the preferred method for monitoring assets. InSAR has many advantages compared to conventional measurement methods. It generates over 100,000 measurement points per km2, with weekly updates and up-to 25 years back in time. You can monitor a single building or an entire city. So the amount of data you need to analyse to understand the behaviour of your asset is much higher and also different then the conventional methods.
Although we visualise InSAR data on a map, interpreting the data is not as easy as it intuitively seems. To the contrary of conventional measurement techniques, a single measurement point with InSAR doesn’t say much. And since we work with very lengthy time-series of up to 25 years with frequent updates, the average deformation in mm/year can be misleading.
To truly get the most out of InSAR data it is important for asset managers to understand the principles of InSAR data. Reading the data with the knowledge of maintenance etc of the asset, will reveal new insights in the behaviour of the asset. And the longer the time-serie, the more reliable predictions become.
SkyGeo offers a variety of training courses. From beginner to advanced and expert users, but also for different kind of assets. For municipalities we use different courses to detect
SAR & InSAR voor gemeenten
Cursussen worden gegeven door:
Prof. Dr. Ramon Hanssen (TU Delft)