Geostationary
TDRS 7
Data Relay · NASA
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One of the older workhorses of NASA's space communications network. TDRS-7 has relayed more combined science data from orbiting observatories than almost any other spacecraft in history — every Hubble image, every Chandra X-ray dataset, every ISS experiment result has traveled through the TDRS network on its way to Earth. At over 30 years old, it still functions.
Its orbit
- Orbit
- Geostationaryappears to hang motionless over one spot on the equator
- Altitude
- 22,214–22,270 mi (35,750–35,840 km)
- Inclination
- 13.3°
- One orbit
- 23.9 hoursabout one orbit a day
- NORAD ID
- 23613
- Int’l designator
- 1995-035B
- Launched
- 1995
Orbital elements from CelesTrak, as of 22 Sep 2026.
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- TELSTAR 12VAtlantic / Americas Communications
- TELSTAR 18VAsia-Pacific / Pacific Maritime Communications