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One day @lamont-granquist will implement primer vector guidance based to the Principia flight plan, integrated by Principia (see #1659 (comment)).
In the meantime however, there is much to do in low-Earth orbit (in particular for launch, where the Principia flight plan does not exist and third-body effects are irrelevant).
There, the usual analytic perturbation models are adequate; launching to given 𝐽2-mean elements would be vastly more useful than having the guidance pretend that the osculating elements are true.
In order to use these, the geopotential coefficients must be obtained from Principia.
We should probably provide the reference radius as well.
GM should be consistent with KSP's, or if it is not, we should enforce that; having an external API to query our gravitational parameter does not sound very useful.
One day @lamont-granquist will implement primer vector guidance based to the Principia flight plan, integrated by Principia (see #1659 (comment)).
In the meantime however, there is much to do in low-Earth orbit (in particular for launch, where the Principia flight plan does not exist and third-body effects are irrelevant).
There, the usual analytic perturbation models are adequate; launching to given 𝐽2-mean elements would be vastly more useful than having the guidance pretend that the osculating elements are true.
In order to use these, the geopotential coefficients must be obtained from Principia.
An API along the lines of
should do the job (where the
XY
containsx
= 𝐶𝑛𝑚,y
= 𝑆𝑛𝑚).The text was updated successfully, but these errors were encountered: