The document discusses CNES OpenSearch implementations for facilitating study of issues related to climate and ecosystems. It describes Theia, a thematic platform offering a broad range of images and processing services. Theia provides search, visualization, and download services depending on user authorization. Take5 is described as a SPOT4 simulator of Sentinel-2 time series, observing 45 sites every 5 days from March to June 2013 to replicate Sentinel-2 orbit repeatability. Users can choose acquisitions, download individual products, or download whole series.