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281180db24
Use consistent wording for these two orientation systems: EQJ = J2000 mean equator ECL = J2000 mean ecliptic
716 B
716 B
//astronomy/io.github.cosinekitty.astronomy/rotationEqdEcl
rotationEqdEcl
fun rotationEqdEcl(time: Time): RotationMatrix
Calculates a rotation matrix from equatorial of-date (EQD) to J2000 mean ecliptic (ECL).
This is one of the family of functions that returns a rotation matrix for converting from one orientation to another. Source: EQD = equatorial system, using equator of date. Target: ECL = ecliptic system, using equator at J2000 epoch.
Return
A rotation matrix that converts EQD to ECL.
Parameters
| time | The date and time of the source equator. |