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I already asked here about how to calculate orbits of satellites programmatically then plot them on 2d plane, but my question was too broad.

I'm still on my journey to understand & pull such software out ; I learned that Orbital state vectors are the way to start plotting a certain celestial object's orbit, but I don't quite understand the parameters of the vector.

Needing R (position) & V (velocity) & T (time),

Since V can be fetched from dividing the differentiation of R/T.

But R is composed of (x,y,z), how can I calculate it with respect to the frame of reference (earth-centered equatorial system) ?

Am I moving on the right track ?

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  • $\begingroup$ Do you just want to know how the orbit would look like, or do you want to find the position/velocity as a function of time? $\endgroup$ – fibonatic Jun 23 '15 at 1:19
  • $\begingroup$ I'm targeting the latter in order to have a real-time tracking map. Though ; I truly lack the resources & the knowledge to come up with that, and I can't waste peoples' time in here in infinite questions. I'll stick to static orbit display only ( your first suggestion). $\endgroup$ – Mohammed Baashar Jun 23 '15 at 18:26
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For plotting, it is easiest to compute the positions and the time as a function of the eccentric anomaly, as opposed to trying to compute position as a function of time. You can compute the velocity as a function of the eccentric anomaly as well.

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  • $\begingroup$ Thank you for the answer. I'll research the eccentric anomaly, and see how it might serve me in completing my project. $\endgroup$ – Mohammed Baashar Jun 23 '15 at 18:28

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