Preparing a December 2015 flight test of a precursor of a steerable airborne antenna called the Software PARIS Interferometric Receiver or SPIR, capable of steering separate antenna beams to build up a rapid surface picture, and differentiating between different signal sources, such as GPS from Galileo. Rouhe Erkka (left) pilot from Aalto University (Helsinki, Finland), Fran Fabra (centre) and Serni Ribó (right) from CSIC-IEEC (Institute of Space Studies of Barcelona, Spain), SPIR developers.