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Convert Earth-centered inertial (ECI) to Earth-centered Earth-fixed (ECEF) coordinates

`dcm=dcmeci2ecef(reduction,utc)`

`dcm=dcmeci2ecef(reduction,utc,deltaAT)`

`dcm=dcmeci2ecef(reduction,utc,deltaAT,deltaUT1)`

`dcm=dcmeci2ecef(reduction,utc,deltaAT,deltaUT1,polarmotion)`

`dcm=dcmeci2ecef(reduction,utc,deltaAT,deltaUT1,polarmotion,Name,Value)`

uses
the difference between International Atomic Time and UTC to calculate
the position direction cosine matrix.`dcm`

=dcmeci2ecef(`reduction`

,`utc`

,`deltaAT`

)

uses
the difference between UTC and Universal Time (UT1).`dcm`

=dcmeci2ecef(`reduction`

,`utc`

,`deltaAT`

,`deltaUT1`

)

uses
the polar displacement.`dcm`

=dcmeci2ecef(`reduction`

,`utc`

,`deltaAT`

,`deltaUT1`

,`polarmotion`

)

uses
additional options specified by one or more Name,Value pair arguments.`dcm`

=dcmeci2ecef(`reduction`

,`utc`

,`deltaAT`

,`deltaUT1`

,`polarmotion`

,`Name,Value`

)