Photophoretic tracers0

• NASA Innovative Advanced Concepts (NIAC) Program, NIAC Studies, Research and Technology Mission Directorate, SCIENCE, Science / Health, Science Mission Directorate, scientists, Space, Space Communications & Navigation Program, Space Launch System (SLS), Space Technology Mission Directorate, Space Telescope, space-x-ipo, SpaceX
• July 22, 2026

Benjamin SchäferRare Technologies, Inc. We propose a new approach for atmospheric sensing at altitudes of 30 to 100 km using photophoretically levitating tracers. These lightweight structures take advantage of sunlight to remain suspended for up to months at controlled altitudes and can be tracked remotely using lidar or satellite radar. Unlike natural sprays, these tracers