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So, I have

- TLE data
- Reference frame: QMOD
- Type: Osculating
- Semimajor axis
- Eccentricity
- Asceding node
- Argument of Perigee
- True longitude

I must calculate Mean Anomaly, just I need formula

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  • $\begingroup$ I think it would be better if you explained more what you are trying to do. Mixing a TLE and osculating elements doesn't make sense. Why don't you actually show, or explain what you have more clearly. $\endgroup$ – uhoh Jul 17 '18 at 7:35
  • $\begingroup$ @uhoh I have TLE data and reference frame. Just I need formula for converting from true longitude to mean anomaly $\endgroup$ – iLLkeeN Nemo Jul 17 '18 at 7:56
  • $\begingroup$ You have TLE? But TLE entry of line 2 columns 44–51 is the value of mean anomaly, in degrees! $\endgroup$ – SF. Jul 17 '18 at 12:32
  • $\begingroup$ There are a lot of questions like this, and I think someone should do a definitive 'elliptical orbit' answer, explaining how to compute values, talking about things like the Equation of the Center, and so on. Or maybe just link to a good resource, something like stargazing.net/kepler/ellipse.html $\endgroup$ – barrycarter Jul 17 '18 at 15:11
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    $\begingroup$ @iLLkeeNNemo: cat tle | tail -n +1 | head -n 1 | cut -c 44-51 ? How does one write a formula for a given? $\endgroup$ – SF. Jul 18 '18 at 5:53

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