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Ryan C

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41
Unix Epoch in International Space Station
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32
Did Sputnik 1 tell us more than "beep"? What science was improved by information gained from its orbiting the Earth?
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25
Why are all trajectories in space a conic sections?
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13
Is it normal for the US Space Force to warn companies about a possible collision (conjunction)?
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12
What is different between Hill frame and LVLH frame in satellite?
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9
Why does the Indian PSLV rocket have tiny boosters?
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8
Why are there six orbital elements?
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8
Which space project was remained as most postponed in space history?
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7
How big does a planet have to be to appear flat for human sized observer?
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6
How can the CYGNSS spacecrafts (actually) measure ocean roughness?
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6
What is/was legacy TLE ephemeris type 2? (TLE, line 1, column 63)
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6
Tutorial for orbits from TLE data
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6
How can rockets measure their own speed relative to the ground?
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6
Efficient method to compute rise and set times of satellites (visibility problem)?
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6
Has Skyfield or any other SGP4-capable open-source Python package yet wrapped/implemented the new, improved SGP4 (version 8+)?
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6
What is the range of frequencies of a deep space channel?
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6
Is it possible to detect if orbits intersect or not and positions where they intersect if you know Keplerian elements (2D)?
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6
How can I plot satellite's trajectory from three different TLEs to detect any deviation on path with time?
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6
Why does the eccentricity vector always point towards the periapsis of an orbit?
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6
Why are uncertainties of orbital state vectors provided as covariance matrixes?
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5
Will the new "TLE format" be orbitally-mechanically better than traditional TLEs?
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5
Coord. system:collection of charts (local homeomorphisms to ℝ𝑛) for differentiable manifold 𝑀, frame:section of tangent vector fiber bundle over 𝑀
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5
Computing a new TLE following a delta-v impulse?
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5
Does the Juno spacecraft have an "open signal, by design"?
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5
How accurate can a satellite's orbit be?
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5
How is an input card for SGP4/other astro standards packages crafted?
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5
What is the right way to get Mars' sol?
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5
How could 99942 Apophis, in 2029, be captured and brought into a low Earth orbit?
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