[Proj] triaxial ellipsoid

[Aleksander Yanovskiy]

Thank you Charles for the suggestions, could you please say whether I'm right stating that "there is no difference in longitude of principal axes orientation between the triaxial Earth ellipsoid and the (3,2) (third degree second order zonal harmonics) Earth figure (triaxial + pear shaped) ?"

18.10.2012, 23:52, "Charles Karney" <charles.karney at sri.com>:
> I don't know of any references to help you on this specific question.  I
> suggest either looking at the relevant coefficients in the EGM2008
> gravity model, or, in order to incorporate the zeta-to-N correction,
> compute the needed spherical harmonic components of the geoid height
> directly.
>
> On 2012-10-18 14:11, Aleksander Yanovskiy wrote:
>
>>  Thank you Charles,
>>
>>  could you please let me ask one more question: please, point me to the publication (if you know any)  where the calculation of the principal axes orientation of the (3,2) (third degree second order zonal harmonics) Earth figure is being discussed ?
>>
>>    -Aleksander