This photograph was taken on May 11th, 2017 over sunny Paris by French satellite Pleiades circling at an altitude of nearly 700 km.
If you zoom in on the Ecole Militaire, south-east of the Eiffel Tower right at the end at the Champs de Mars, you may see a white “53” sign circled by a dotted line.
Each dot is a comrade from IHEDN’s 53rd Armement et Economie de Défense class.
Many thanks to CNES and Airbus for this quite unique facebook picture from space.