EOP#

class spacekernel.iers.EOP(mjd_utc)#

Bases: object

Earth Orientation Parameters

The Earth Orientation Parameters (EOP) are a set of data necessary to describe the irregularities of the Earth’s rotation [1], that are periodically estimated and published by the International Earth Rotation and Reference Systems Services (IERS) through its bulletins.

EOP objects provides quickly access to those data and some services regarding their interpolation.

Parameters:
mjd_utcndarray [ float64 ]

Time array of the needed EOP in modified julian date format.

References

Summary#

Properties#

EOP.pm_x

Polar motion - x (in radians)

EOP.pm_y

Polar motion - y (in radians)

EOP.dut

The difference UT1 - UTC (in seconds)

EOP.lod

Length of Day (in seconds)

EOP.dX

IAU2000A Celestial Pole Offset Series - X (in radians)

EOP.dY

IAU2000A Celestial Pole Offset Series - Y (in radians)

EOP.dat

The difference TAI - UTC (in seconds)

EOP.TAI_UT1

The difference TAI - UT1 (in seconds)

EOP.TT_UT1

The difference TT - UT1 (in seconds)

Members#

property EOP.pm_x: ndarray[double]#

Polar motion - x (in radians)

property EOP.pm_y: ndarray[double]#

Polar motion - y (in radians)

property EOP.dut: ndarray[double]#

The difference UT1 - UTC (in seconds)

property EOP.lod: ndarray[double]#

Length of Day (in seconds)

property EOP.dX: ndarray[double]#

IAU2000A Celestial Pole Offset Series - X (in radians)

Used to compute Earth’s nutation

property EOP.dY: ndarray[double]#

IAU2000A Celestial Pole Offset Series - Y (in radians)

Used to compute Earth’s nutation

property EOP.dat: ndarray[double]#

The difference TAI - UTC (in seconds)

property EOP.TAI_UT1: ndarray[double]#

The difference TAI - UT1 (in seconds)

property EOP.TT_UT1: ndarray[double]#

The difference TT - UT1 (in seconds)