The interior structure of small Asteroids is assumed to be a loose rubble pile composite. How these voids are distributed, and what size scale this porosity has, is not yet known, as in-situ measurements are still outstanding. We propose a low budget, mission to scan an NEA utilizing a swarm configuration of 2 6U-Cubesats of just 13.0 kg in full flight configuration. The 200m depth penetration 20Mhz radar will allow to analyze the surface and interior structure using inverse tomography method. [mehr]