NASA'S SPACE COMMUNICATIONS AND NAVIGATION: DON'T LEAVE EARTH WITHOUT IT!

摘要

NASA's Space Communications program provides services to missions throughout the solar system. It provides the link between Mission Operations Centers (MOCs) and their spacecraft with services that include transmitting commands to spacecraft, receiving telemetry and sensor data from spacecraft, and tracking their positions. Currently, three space communications networks provide these services - the Near Earth Network (NEN), Deep Space Network (DSN), and Space Network (SN).