Network Earth Rotation Service

Earth rotation parameters now

The table is refreshed every 10 seconds

Parameter TAI time                      Value            Dimension
e1        2026.08.20-11:36:09.4600000   1.691630594D-06  rad 
e2        2026.08.20-11:36:09.4600000   1.064412091D-06  rad 
e3        2026.08.20-11:36:09.4600000   2.697590286D-03  rad 
e1r       2026.08.20-11:36:09.4600000  -5.720780283D-14  rad 
e2r       2026.08.20-11:36:09.4600000  -3.778587827D-14  rad 
e3r       2026.08.20-11:36:09.4600000  -2.735296284D-14  rad 
e1rr      2026.08.20-11:36:09.4600000  -5.549625115D-20  rad 
e2rr      2026.08.20-11:36:09.4600000   1.137457274D-19  rad 
e3rr      2026.08.20-11:36:09.4600000  -1.355960576D-18  rad 
utcmtai   2026.08.20-11:36:09.4600000  -37.0000000       s
ut1mtai   2026.08.20-11:36:09.4600000  -36.9932486       s
ut1rat    2026.08.20-11:36:09.4600000   3.240892309D-05  s/day
lod       2026.08.20-11:36:09.4600000  -3.223219179D-05  s
xpol      2026.08.20-11:36:09.4600000   0.219551         arcsec
ypol      2026.08.20-11:36:09.4600000   0.348924         arcsec
xpolr     2026.08.20-11:36:09.4600000  -6.733926887D-04  arcsec/d
ypolr     2026.08.20-11:36:09.4600000  -1.019516230D-03  arcsec/d
deps      2026.08.20-11:36:09.4600000    8.0632847       arcsec
dpsi      2026.08.20-11:36:09.4600000    9.2594550       arcsec
mat       2026.08.20-11:36:09.4600000  -7.919194011407D-01   6.106222052141D-01   2.045628607969D-03  -6.106200719127D-01  -7.919220426525D-01   1.614353882831D-03   2.605738713661D-03   2.933627241608D-05   9.999966046268D-01
matr      2026.08.20-11:36:09.4600000  -4.452711840584D-05  -5.774786719874D-05   1.178477983318D-07   5.774767478622D-05  -4.452727429791D-05  -1.490906030517D-07   1.490088660427D-10  -1.515010039652D-11  -3.878350405253D-13
matrr     2026.08.20-11:36:09.4600000   4.211026954031D-09  -3.246980092539D-09  -1.087177709378D-11   3.246968723917D-09   4.211040984732D-09  -8.593906132830D-12   9.910040716274D-16   1.057144120792D-14  -2.914851857692D-18

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Rms errors of the Earth orientation parameter at the current moment:
1.1 nrad for components 1,2 (polar motion) and
2.5 nrad for component 3 (axial component, or UT1),
which corresponds to 7 and 16 mm at the Earth's surface respectively.

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This page was prepared by Leonid Petrov ()
Last update: 2025.11.10_08:51:28