# Tracking and Data Relay Satellites (TDRS) (D)

A 3D model from NASA/Christopher R. Meaney, [NASA](https://science.nasa.gov/3d-resources/tracking-and-data-relay-satellites-tdrs-d/).

- Licence: [Not subject to copyright in the United States (NASA)](https://www.nasa.gov/nasa-brand-center/images-and-media/)
- Credit: NASA/Christopher R. Meaney
- Model (GLB): [https://assets.science.nasa.gov/content/dam/science/cds/3d/resources/model/tracking-and-data-relay-satellites-(tdrs)-(d)/Tracking%20and%20Data%20Relay%20Satellites%20(TDRS)%20(D).glb](https://assets.science.nasa.gov/content/dam/science/cds/3d/resources/model/tracking-and-data-relay-satellites-(tdrs)-(d)/Tracking%20and%20Data%20Relay%20Satellites%20(TDRS)%20(D).glb)
- Not offered in your room: its source does not state the model's scale, so it could not be shown at its true size.

The Tracking and Data Relay Satellite system is NASA’s network of specialized communications satellites in geosynchronous orbit that provide communications services to many NASA spacecraft. These satellites relay signals between spacecraft, including the International Space Station, and ground control stations on Earth.