This is probably not the same paper, but it's by the same author on this topic: https://assets-eu.researchsquare.com/files/rs-3909633/v1_covered_b88d8362-a612-

This is probably not the same paper, but it's by the same author on this topic: https://assets-eu.researchsquare.com/files/rs-3909633/v1_covered_b88d8362-a612-48ba-8cd6-978489b9579f.pdf?c=1707878948 https://assets-eu.researchsquare.com/files/rs-3909633/v1_cov... "Sunlight-powered hovering of an ultra-light micro aerial vehicle" (PDF)