The operational scenario schematic can be seen in Figure 2, and it is described as follows: Figure 2. AlfaCrux operational concept. The satellite transmits beacons while orbiting the Earth, sending telemetry information. When the satellite passes through the ground station, the operation team veri...
Based on CT experiments of the mechanical behavior of a certain sandstone, the safety zone, the damaging zone, and the fracture zone of geotechnical materials were defined, and the CT threshold standard of this zone was discussed and empirically selected. Mathematical morphological image measurement ...
China’s Great Green Wall has reached a new milestone•Dec. 29, 2024, 9:17 PM ET (Earth.com) desertification, the process by which natural or human causes reduce the biological productivity ofdrylands(arid and semiarid lands). Declines in productivity may be the result ofclimate change,de...
Solar Dynamics Observatory (SDO), U.S. satellite designed to study the Sun. It was launched on February 11, 2010. SDO is the first satellite in NASA’s Living with a Star program, which studies space weather—that is, the effects of solar activity on Ear