Photophoretic Tracers for Near-Space Remote Sensing at 30-100 km Altitudes Benjamin SchaferRarified Technologies, Inc. We propose a new approach to atmospheric sensing at 30-100 km altitudes using photophoretically levitating tracers. These lightweight structures harness sunlight to remain suspended for up to months at controlled altitudes and can be remotely tracked by satellite-based lidar or radar. Unlike natural aerosols, these tracers are designed to provide st Categories: Space Technology Mission Directorate, NASA Innovative Advanced Concepts (NIAC) Program, NIAC Studies, Research and Technology Mission Directorate Published (UTC): 2026-07-21T15:23:43.000Z Original source: https://www.nasa.gov/directorates/stmd/photophoretic-tracers-for-near-space-remote-sensing-at-30-100-km-altitudes/View original source
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