The Space Network (SN) was established in the early 1980s to replace NASA's worldwide network of ground tracking stations.
The Space Network consists of:
- A constellation of geosynchronous (Earth orbiting) satellites named the Tracking Data Relay Satellite (TDRS)
- Ground systems that operate as a relay system between satellites
- Satellites in low Earth orbit (LEO) above 73 km
- Ground facilities
The Space Network is operated 24 hours a day, seven days a week, 365 days per year. Operations on the network run above 99.5% proficiency every month. Usually the Space Network operates above 99.9%.
Services provided by the Space Network are:
- Tracking and clock calibration
- Testing and analysis
Map of Space Network Sites
Guam Remote Ground Terminal
White Sands Complex, New Mexico