Space Network (SN)

Space Network (SN)

OVERVIEW

The Space Network (SN) empowers missions with reliable and secure relay communications and tracking services. The SN's global coverage enables near-continuous, bi-directional communications, a unique capability well-suited for launch vehicles and flagship missions like the International Space Station and the Hubble Space Telescope.

The SN's architecture is comprised of two segments. The space segment consists of a constellation of Tracking and Data Relay Satellites (TDRS) in geosynchronous orbit. A series of ground-based antennas make up the network's ground segment. All TDRS are within sight of at least one ground station at all times.

Quick Facts

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The SN operates 24/7, and provides approximately 500 hours of user service every day.
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The SN transmits approximately 28 terabytes of data per day.
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Collectively, the TDRS fleet has more than 200 years of on-orbit operations.