TY - RPRT TI - Multi-Resolution Elevation Mapping and Safe Landing Site Detection with Applications to Planetary Rotorcraft AU - Brockers, Roland AU - Siegwart, Roland AU - Matthies, Larry AU - Hinzmann, Timo AU - Pantic, Michael AU - Delaune, Jeff AU - Proenca, Pedro F. AU - Schoppmann, Pascal PY - 2021 UR - https://ntrs.nasa.gov/citations/20230005533 ID - 20230005533 ER -