The blue of the Calanda reservoir amid the rugged landscape of northeastern Spain, as seen by ESA's oldest - and one of its smallest - Earth-observing missions, Proba-1, midway through its 15th year of operations.

The Proba-1 microsatellite (smaller than a cubic metre) is the first in ESA's series of satellites aimed at flight-testing new space technologies, designed for autonomous operations.

Proba-1 was launched on 22 October 2001 and is still going strong today, more than fifteen years later.

After a short period of inactivity, Proba-1 was successfully put back in Energy mode (by ESA Redu station) on Monday 09 February 2015 at 03:10 UTC and the imaging activities were restarted on Thursday 12 February 2015.

ESA's Earth-observing microsatellite Proba-1 has glimpsed one of the loneliest places on Earth - Concordia research base in the heart of Antarctica.

This Olympics has been watched from all over the world - and beyond. Benefiting from a cloudless sky, this view of London's Olympic Park was captured by the smallest imager aboard ESA's smallest mission: the High Resolution Camera on the Proba-1 microsatellite.

Technical problems have been causing a delay in the processing and delivery of PROBA data for upload on the ESA Online repository and in the EOLI-SA catalogue.