Monitoring of Nuclear Decommissioning Sites

Credit: Space Imaging
Public domain
Public domain

Monitoring of Nuclear Decommissioning Sites

The focus of this service chain is monitoring the decommissioning of nuclear sites in order to verify compliance with nuclear non-proliferation treaties.

This service chain provides geo-spatial products based on Very High Resolution (VHR) Synthetic Aperture Radar (SAR) images (in contrast to the service chain Continuous Surveillance of Nuclear Facilities, which also uses optical data).

 

Core products

 

Radiometric Improved SAR products providing an improved radiometric resolution for better imagery analysis.

 

 

Multi-temporal Coherence Map showing changes between two points in time

 

 

Both products are provided in slant range geometry and as orthorectified images using a proper Digital Elevation Map (DEM) of the area.

 

Radiometric Improved SAR products

Very High Resolution (VHR) Synthetic Aperture Radar (SAR) images provide a high probability of detecting features on the ground, but they are affected by speckle noise. Thus, the analysis of these images requires expert personnel. In order to minimise that noise and improve the detection of features, a SAR product derived from the combination of a time series of SAR original data is obtained, named Radiometric Improved SAR Image. This product presents an improved radiometric resolution for better imagery analysis.

 

 

Multi-temporal Coherence Map

As a general rule, detected changes provide knowledge about the activities carried out in an area of interest. The Multitemporal Coherence Map supports the analysis performed by the user in this area. The MTC is a multitemporal image obtained from two SAR images, exploiting the complex characteristics of radar data, i.e., both the amplitude and the phase of the images are used to obtain the final MTC map. The composition of the MTC image is the following: In R band, the backscattering of the image of date 1 is included. In G band, the backscattering of the image of date 2 is provided and in B band, the coherence image obtained from the phases of the two images is provided. Thus, the MTC map provides an analysis of the changes which have occurred in the area between the two images’ dates.

Red areas represent features removed in comparison to the first image, green elements represent features added in the second image. Blue elements are areas where no changes were detected.

 

Service coordination

This pilot service is coordinated by Indra with the efforts of other partners inside the G-MOSAIC project (European Union Satellite Centre (EUSC), German Aerospace Centre (DLR), e-Geos, Joint Research Centre (JRC), TU Bergakademie Freiberg (TUBAF).

 

 

Click the link below to download the service brochure (for both service chains in the Nuclear and Treaties Monitoring domain):

Monitoring of Nuclear Decommissioning Sites - Continuous Surveillance of Nuclear Facilities