Satellites flying in specific formation during proximity operations are relying on an accurately determined position. So far PRISMA has been relying on GPS for navigation. On 21st of April and from 2nd to 4th of May several proximity operations experiments below 30m relative distance have been performed with the VBS close range (CR) camera running as a passenger experiment in open loop.

From the 14th of April the ECAPS High Performance Green Propulsion System (HPGP) experiment started its final campaign HPGP-4, the one planned for the extended mission period.

The different experiments executed at GSOC are performed at different relative distances between the two spacecrafts. According to this we had to transfer Mango from a position at 1500 m behind Tango closer down to 50 m. The ideal opportunity to take a sequence with the Far Range camera testing its use for later GSOC experiments.

On 19th of April the DVS camera system on-board MANGO took some exceptional images of the Earth surface. One of those is a fine picture of the Alps separating Germany and Italy. Several remarkable spots can be recognized here.