Velocity is a fundamental property of rocks that depends on density and elastic moduli. It varies laterally as well as vertically due to the physical-geologic variations of rocks. Velocities are ...

First, the design of deep-space open-loop velocity measurement on the basis of China’s DSN (CDSN) is presented. The process of deep-space open-loop velocity measurement contains six steps. First, ...

Wide binary stars with separation greater than about 2000 astronomical units are interesting natural laboratories that allow a direct probe of gravity at low acceleration weaker than about 1 nanometer ...