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I just want to ask if someone does possess the formula linking the local hour to the right ascension of the ascending node (RAAN).

I will try to explain myself: I know that I want my satellite to be on a sun-synchronous orbit 10h30-22h30 with 10h30 corresponding to my local time of ascending node (LTAN) as my entrance parameter; and I want to know the RAAN because in every software simulating an orbit the entrance parameter is the RAAN.

So how can I pass from the LTAN to the RAAN?

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  • $\begingroup$ I presume with RAAN you mean Right Ascension of the Ascending Node, and with LTAN you mean Longitude of the Ascending Node (which I only know as LAN)? In that case, both are exactly the same - its just a different name for the same thing/number. $\endgroup$ – Polygnome Jul 19 '17 at 10:56
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    $\begingroup$ In this context, I think LTAN means Local Time of the Ascending Node. $\endgroup$ – Christoph Nov 22 '18 at 13:48
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I guess you mean something like this: https://www.mathworks.com/matlabcentral/fileexchange/39085-mean-local-time-of-the-ascending-node

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  • $\begingroup$ Link-only answers are not appreciated. Can you summarize the information at the link? $\endgroup$ – Organic Marble Mar 19 at 18:28
  • $\begingroup$ I though a link-only answer to a two years old question was better than no answer, but of course, I will explain when I have the time and I will appreciate the removal of the downvote. $\endgroup$ – astrojuanlu Mar 19 at 18:41

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