Hello,
I have some doubt about the computation of the reflectivity coefficient used in SRP acceleration for a spherical spacecraft.
We have: Ca (absorption) + Cs (specular) + Cd (diffuse) = 1
and, for a spherical spacecraft, after integration on the sphere, I expect the reflectivity coefficient Cp to be:
Cp = 1 + 4/9 * Cd
So, if using only Ca and Cs, I would expect to have: Cp = 1 + 4/9 * (1 - Ca - Cs).
But, in the SphericalSpacecraft class, the value is:
1 + 4/9 * (1 - Ca) * (1 - Cs)
Is it an error in Orekit or am I missing something on reflectivity computation?
Thank you
Christophe