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Questions tagged [tdrss]

NASA's Tracking and Data Relay Satellite System - a network of satellites in geosynchronous orbit used to facilitate communications with and tracking of spacecraft in lower orbits.

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11 votes
2 answers
2k views

Do antennae on the ISS have to constantly move to maintain data links?

In this question and answer pair I see that the ISS can maintain data links to earth through direct access to ground stations as well as through the TDRSS geostationary satellite network. What kind ...
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10 votes
1 answer
711 views

Why do the geosynchronous TDRS satellites have this distribution of inclinations?

From the Tracking and Data Relay Satellite System (TDRSS) option on Celestrak's NORAD Two-Line Element Sets Current Data TLE page I've compiled current TLE ...
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4 votes
1 answer
154 views

Why does TDRS 1's inclination evolve so much differently than that of all the others starting in 1995?

The plot below is from the question Why do the geosynchronous TDRS satellites have this distribution of inclinations?, and the explanation says Inclination and mean motion (rev/day) for TDRS ...
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1 vote
1 answer
153 views

What's the method behind this TDRS triplet inclination "madness"?

Previous "method to the maddness" questions: 1, 2. The image below is from Why does TDRS 1's inclination evolve so much differently than that of all the others starting in 1995? and I've used it a ...
uhoh's user avatar
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4 votes
1 answer
389 views

Is TDRS-M (TDRS-13) where it's supposed to be?

edit: Status 2018-Jan-01 inclination still about 7 degrees, location still not listed in Wikipedia. This question got me thinking about the location of active TDRS satellites, and the newest addition ...
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3 votes
1 answer
129 views

Has TDRS-13 officially graduated from "TDRS school" (entered into service)?

According to Wikipedia: TDRS-M, to be renamed TDRS-13 upon entry into service, is an American communications satellite operated by NASA as part of the Tracking and Data Relay Satellite System. The ...
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3 votes
1 answer
133 views

Why did the last six TDRS satellites start at ~7° inclination on a downward trend that appears to be "repelled" by zero & bounce back w/o crossing?

The most recent six TDRS satellites (8 through 13) were inserted into moderate inclination orbits of roughly 7°, and in all cases their inclinations immediately decreased at rates of about +/-1 or +/-...
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2 votes
1 answer
347 views

How exactly does TDRSS provide tracking? (Tracking and Data Relay Satellite System)

This excellent answer to How does satellites know it is in apogee or perigee states: The NASA Tracking and Data Relay Satellite System (TDRSS) adds to this a constellation of satellites in such a ...
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0 votes
0 answers
117 views

Does the TDRS user segment ever provide network functionality beyond being a "customer"?

Celestrak's NORAD Two-Line Element Sets Current Data TLE page has many pre-defined categories for quick access for groups of spacecraft that share similar characteristics. I clicked on the ...
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