from Prof. Dr. ir. Maarten Uijt de Haag, he introduces pros and cons of using dual LIDAR Andrew Johnson's presentation : this TRN has been in use since Mars MSL mission in 2011, and advance further in Mars 2020 The Mars 2020 mission is facing the most challenging landing yet on the Red Planet. It will touch down on Feb. 18, 2021, in Jezero Crater, a 28-mile-wide (45-kilometer-wide) expanse full of steep cliffs, boulder fields and other things that could boobytrap the landing. A new technology called Terrain Relative Navigation (TRN) will allow the spacecraft to avoid hazards autonomously. This improves the landing accuracy from previous 1 to 2 km to now less than 60 m The Lander Vision System (LVS) for M2020 is representative of the current state of the art in map-relative localization for TRN. Orbital reconnaissance imagery of Mars is available with a resolution of 30 cm/pixel from the HiRISE camera; this is processed into maps at two resoluti...