Space Exploration
Bill Gray's user avatar
Bill Gray's user avatar
Bill Gray's user avatar
Bill Gray
  • Member for 5 years, 2 months
  • Last seen more than 1 year ago
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All Questions Answers
Score Newest
answer
9
What is the basic mechanics behind the way the orbits of the twelve Vela spacecraft evolved over decades?
Sep 19, 2018
answer
8
Is TESS really lost? What does Celestrak mean exactly?
Apr 18, 2019
answer
7
Differences between SGP8 and the standard SGP4? Is it ever used in practice?
Apr 18, 2019
answer
7
What artificial satellite has the farthest orbit around the Earth?
Dec 16, 2019
answer
7
Why can't custom-made TLEs for the DSCOVR launch booster in orbit around Earth work with SDP4?
May 26, 2021
answer
5
Has a TLE ever been issued for a spacecraft trajectory not bound to Earth orbit?
Apr 15, 2019
answer
4
Why has no TLE been published for the DSCOVR satellite and the Falcon 9 R/B?
Apr 15, 2019
answer
4
Where is Vela 1A? Is there any information what its orbit would be like now?
Sep 20, 2018
answer
4
In a 3D space defined by semimajor axis, eccentricity and inclination, what would be the shape of the space where SDP4 works better than SGP4?
May 30, 2021
question
4
What's the exact location (lat/lon) of Zhurong?
Jun 7, 2021

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