The RAIN (Rocket deployed Atmospheric probes conducting Independent measurements in Northern Sweden) experiment demonstrates a technique for collecting aerosol particles in the middle atmosphere using multiple probes ejected from a sounding rocket. Collection samples on each probe are exposed over varying height ranges between 80 and 22 km giving an altitude distribution profile of aerosol particles. The experiment was launched on board the REXUS-11 sounding rocket on November 16, 2012 from Esrange Space Centre. The experiment operated nominally and was recovered. Initial scanning electron microscopy analysis of the collection samples indicates that aerosols were collected during the fall, however detailed analysis over all height ranges is ongoing.