//astronomy/io.github.cosinekitty.astronomy/rotationHorEqd
fun rotationHorEqd(time: Time, observer: Observer): RotationMatrix
Calculates a rotation matrix from horizontal (HOR) to equatorial of-date (EQD).
This is one of the family of functions that returns a rotation matrix for converting from one orientation to another. Source: HOR = horizontal system (x=North, y=West, z=Zenith). Target: EQD = equatorial system, using equator of the specified date/time.
A rotation matrix that converts HOR to EQD at time and for observer.
| time | The date and time at which the Earth's equator applies. |
| observer | A location near the Earth's mean sea level that defines the observer's horizon. |