Blind regards: Troubling data and their sentinels

A new generation of environmental satellites, the Sentinels, has recently been launched by the European Space Agency (ESA). Part of ESA’s Copernicus Programme, the sentinel mission has adopted an Open Data policy which intends to make different levels of data freely available via an online data hub. Sentinel data will support applications including land monitoring, emergency management and security and will thus form the evidence-base for a wide-range of local, regional, national and international decisions, from individual insurance claims to humanitarian interventions. By providing ever more data streams for monitoring and managing the planet, the sentinels institute a novel mode of visibility in terms of resolution, coverage and frequency. At the same time, they are co-constitutive of the increasing datafication of the environment. In the entwinement of heavenly gaze and data visions, I want to recover the work of ‘data fictions’ in order to demystify notions of visibility and calculability associated with “earth observation” and trouble its unquestioned pursuit of total monitoring.