Calculates a rotation matrix from true ecliptic of date (ECT) to equator of date (EQD).
This is one of the family of functions that returns a rotation matrix
for converting from one orientation to another.
Source: ECT = true ecliptic of date
Target: EQD = equator of date
Calculates a rotation matrix from true ecliptic of date (ECT) to equator of date (EQD).
This is one of the family of functions that returns a rotation matrix for converting from one orientation to another. Source: ECT = true ecliptic of date Target: EQD = equator of date