TCS Satellite Data Services

The TCS Satellite Data will provide two levels of products and services, mainly dedicated to the analysis of the Earth surface displacements through Satellite Radar data: the first level deals with “standard” remote sensing products (i.e., displacement maps and deformation time-series). The second level concerns value-added products, such as 3D maps, source mechanisms, and fault models.

In particular, the TCS will deploy of 5 services, each one related to a different provider and a specific National Research Infrastructure: EPOSAR (CNR, Italy), GDM (CNRS, France), 3D-Def (CSIC, Spain), COMET (University of Leeds, UK), and MOD (GFZ, Germany).

These services will include both access to data and processing utilities. They will have two main operations modes:

  • Surveillance mode: systematic, continuous and periodic generation of products over specific areas (for example, the systematic production of updated time series of surface deformation over volcanic areas and near fault observatories);
  • On demand mode: users run the web-tools to remotely process the chosen satellite dataset (for example, ad hoc generation of a deformation measurements using diachronic satellite observations during a telluric crisis, e.g. a co-seismic terrain motion map).

The TCS products and services will be accessible through an interoperable interface. In this framework, the TCS is benefiting from the activities of ESA in developing the Geohazards Exploitation Platform (GEP), that allow users to access and share satellite images, processing facilities, and remote sensing tools. The TCS satellite web interface will be based on the GEP environment that will allow TCS service provider to benefit from a cloud-based and scalable environment, designed following a user-driven approach, to implement innovative and enhanced remote sensing services.

The products deployed in the TCS have been classified in two main categories:

  • Standard (Level-1, such as SAR interferograms, Digital Terrain Models (DTM), and ground displacement maps) and
  • Value-added (Level-2/3, such as 3D displacements maps, source mechanisms, and fault models) satellite products.

WP12 classified Standard Products as high priority and Value-added Products as medium priority, according to the maturity of the proposed techniques and the implementation progress of the services.

Table I. Brief summary of the products and services deployed by each provider of the TCS Satellite Data.

Example of satellite products that will be provided by the TCS. The figure shows the displacements related to the seismic sequence occurred in Central Italy on 24th August 2016. The result has been retrieved by combining ascending (upper left) and descending (upper right) Sentinel-1 radar acquisitions from before and after the 24 August 2016 earthquake. The figure also shows vertical ground subsidence (bottom left), reaching about 20 cm in correspondence to the Accumoli area, and East-West movements (bottom right) of up to 16 cm. The blue line indicates the location of the fault trace.

Geobrowser of the Geohazards Exploitation Platform that will represent the gateway of the TCS Satellite Data. The figure shows an example of the TCS products accessible through the GEP and is relevant to the displacements generated by the seismic sequence occurred in Italy on August-October 2016.