Tracking and Data
Relay Satellite System
The Tracking and Data Relay Satellite System (TDRSS) is a
communication signal relay system, developed by NASA, that relays data to
ground stations and tracks satellites in orbit. The system provides tracking
and data acquisition services between low Earth orbiting spacecraft and NASA or
other ground data processing facilities. The system can transmit to and receive
data from customer spacecraft over 100% of their orbit.
There are currently seven on-orbit satellites located in
geosynchronous orbit that comprise the system, each called a Tracking and Data
Relay Satellite (TDRS). Data flows in two directions. The TDRS receives data
from the ground and transmits it to other on-orbit satellites. It also receives
data from the on-orbit satellites that it transmits to stations on the ground
located near Las Cruces, New Mexico.
Tracking and Data Relay Satellite System
Credits - NASA