One of the most dangerous parts of exploring another planet or moon is landing. Usually, landing sites, especially on the moon, are covered with rocks and craters. NASA plans to carry out robotic and manned missions to the moon and Mars in the future. One of the challenges in landing is to avoid landing on the steep slopes of craters or in boulders. < / P > < p > to improve landing safety, NASA is currently developing and testing a set of precise landing and avoidance technologies. The technology uses a combination of laser sensors, cameras, high-speed computers and complex algorithms to enable the spacecraft to recognize and land while avoiding any danger. The technology is developed under the framework of safety and precision landing integrated capability evolution. < / P > < p > the goal of split is to keep the spacecraft away from boulders, craters and other hazards in a landing site half the size of a football field that has been redesigned to be relatively safe. In the upcoming mission, three of the four main subsystems of split will conduct the first integrated flight test on the new Shepard Blue Ridge rocket. When the rocket booster reaches the boundary between the earth’s atmosphere and space and returns to the ground, the split terrain relative navigation, navigation Doppler lidar and landing computer will run on the booster. Each of them will operate in the same way as they would be near the surface of the moon. < / P > < p > the fourth major component of split is the danger detection lidar, which will be tested through ground and flight tests in the future. NASA says knowing the exact location of the spacecraft is critical to performing the calculations required for a precise landing. On the way, the computer will turn on the navigation Doppler lidar to measure the speed and range to improve the accuracy. < / P > < p > one of the challenges of this mission is to ensure that lidar can work in space. NASA has yet to give an exact date for the flight test. It is said that “gta5” will be launched on Google cloud game platform stadia