Nebula Public Library

The de-risk activity has been focused on the critical aspects of the dual-service constellation and satellite, to remove the principal risks related to understanding the: - Market analysis in order to identify end-users for the proposed service - System concept and architecture definition, including payloads and their accommodation - Preliminary analysis of the dual service expected performances - Combined dual-service quality - Preliminary business case with the preliminary calculation of the total service cost.

The project, part of the ESA Discovery Campaign on Remote Sensing of Plastic Marine Litter, developed a method to estimate floating macroplastic accumulation and transport rates in rivers using remote sensing. It combined the detection of floating water hyacinths using Sentinel-2 and Sentinel-1 with in-situ estimates of macroplastic densities carried by this invasive aquatic weed. Water hyacinths typically form large patches of several meters of width and length, and can thus be detected from space.

Persistent Responsive Real-Time Earth Observation small satellite constellation mission (PERTEO) was a study dedicated to providing a global democratic service to support disaster management. Earth observation and satellite-based communications play a key role in supporting disaster management targeting responsiveness and the persistence of the service. In the terminology of on-demand Copernicus services, responsiveness is determined by the lead-time and latency. The persistence is determined by the availability and by the revisit time of the service.