This guide will get you familiarised with a map and compass, teaching the basics of how to navigate with them, laying the ...

On Thursday 27 March, the European Space Agency (ESA) sent its last messages to the Gaia Spacecraft. They told Gaia to shut down its communication systems and central computer and said goodbye to this ...

The carrier phase relationship between them and are arranged in accordance with the laws of the Gray code [4], which is expressed in two ways constellation diagram is shown in Figure 1. The QPSK ...