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Earth Orientation Matrix Calculator


IERS Rapid Service Prediction Center (IERS RS/PC)

Earth Orientation Parameters Division, US Naval Observatory

*****This interface to the calculator is a work in progress. ******

A working version of the calculator can be found at:


The Earth Orientation Matrix Calculator requires a start date and time (UTC) and a stop date and time (UTC).  For example, for February 10, 2009 at 14:25:10.1234567890 one would enter: 2009, 2, 10, 14, 25, 10.1234567890.

Choose any of the desired input variations:

Enter the MJD on which the finals2000A.daily file was created.  If no MJD is entered, then the most recent file will be used.

Choose any of the desired output quantities:

Do you wish quaternion output instead of matrices for the above quantities? (check box if yes):

Note to users:  This form is a work in progress.  Please check back later.

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