Ground Network Services (GNS)
USN provides ground network services that support Telemetry, Tracking & Control and data downlink operations for satellites and launch systems. Our services support on-orbit missions as well as launch and early-orbit phase (LEOP) operations. USN's services offer security and reliability through built-in redundancies and back-up (see PrioraNet worldwide site locations).

• Single point of interface to our global network of ground stations.
  
• Access to our system through a variety of communication means, including space standards such as CCSDS, SGLS, IP-in-space and telecommunications services using TCP/IP protocol.
  
• Convenient scheduling and operation of the network through command centers in California, Pennsylvania and Kiruna, Sweden.
  
• Supports data rates up to 160 Mbps and has expansion plans to 600 Mbps with a variety of communication protocols.
  
• Payload data reception and level-zero processing of data in S-, X-, Ku- and L-band.
  
• Services include a variety of antenna sizes from 3M to 15M.
  
• Equipment and capabilities can be expanded to meet specific customer needs.

The extensive capabilities and the high degree of flexibility provided by the USN network solution bring substantial benefits to satellite programs. We have experience providing ground network services on a wide variety of missions, including satellites in Low Earth Orbit (LEO) and Geostationary Orbit (GEO) and launch vehicle trajectories prior to orbit insertion. In fact, on several occasions USN has simultaneously provided services to both the launch vehicle and the satellite being launched while continuing to maintain communications with our other on-orbit customers. USN has the capability to support multiple missions, the infrastructure to communicate with many types of vehicles and the flexibility to do it all simultaneously. These and other benefits contribute to making USN the network of choice for ground network services.