https://www.rtbf.be/article/lancement-du-satellite-europeen-sentinel-1d-pour-mieux-observer-les-changements-a-la-surface-de-la-terre-11624512?fbclid=IwdGRzaAN3OiRleHRuA2FlbQIxMQABHuN0ruQzLigxJrQtyPXn23tZ4rk60-UUBo1uot-yvXPeQpV2u4krGy7OgIH6_aem_Ywm_iN0pjcKUs1bj49G_RQ&sfnsn=mo
