Network Earth Rotation Service

Earth rotation parameters now

The table is refreshed every 10 seconds 
Parameter TAI time                      Value            Dimension
e1        2026.07.25-15:23:05.7510000   1.786453468D-06  rad 
e2        2026.07.25-15:23:05.7510000   1.064364545D-06  rad 
e3        2026.07.25-15:23:05.7510000   2.697287523D-03  rad 
e1r       2026.07.25-15:23:05.7510000  -4.429193921D-14  rad 
e2r       2026.07.25-15:23:05.7510000   2.868064078D-14  rad 
e3r       2026.07.25-15:23:05.7510000  -4.507955820D-13  rad 
e1rr      2026.07.25-15:23:05.7510000  -1.094080016D-19  rad 
e2rr      2026.07.25-15:23:05.7510000  -4.992300883D-20  rad 
e3rr      2026.07.25-15:23:05.7510000   1.562912975D-19  rad 
utcmtai   2026.07.25-15:23:05.7510000  -37.0000000       s
ut1mtai   2026.07.25-15:23:05.7510000  -36.9890967       s
ut1rat    2026.07.25-15:23:05.7510000   5.341212735D-04  s/day
lod       2026.07.25-15:23:05.7510000  -5.312086206D-04  s
xpol      2026.07.25-15:23:05.7510000   0.219541         arcsec
ypol      2026.07.25-15:23:05.7510000   0.368482         arcsec
xpolr     2026.07.25-15:23:05.7510000   5.111257086D-04  arcsec/d
ypolr     2026.07.25-15:23:05.7510000  -7.893390177D-04  arcsec/d
deps      2026.07.25-15:23:05.7510000    7.6730936       arcsec
dpsi      2026.07.25-15:23:05.7510000    9.0913227       arcsec
mat       2026.07.25-15:23:05.7510000  -9.938217641141D-01   1.109578418156D-01   2.580409436264D-03  -1.109573958489D-01  -9.938251136805D-01   3.157917677545D-04   2.599515274350D-03   2.752522045074D-05   9.999966208756D-01
matr      2026.07.25-15:23:05.7510000  -8.091140755814D-06  -7.247087199646D-05   2.316360492579D-08   7.247062794885D-05  -8.091173626839D-06  -1.880883780354D-07   1.435277998920D-10   6.251090406133D-11  -3.748246012211D-13
matrr     2026.07.25-15:23:05.7510000   5.284641665006D-09  -5.900176870222D-10  -1.371557473966D-11   5.900152889582D-10   5.284659461092D-09  -1.689536769931D-12  -4.548317369414D-15   1.004357271192D-14   1.152253980350D-17

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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