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