Network Earth Rotation Service

Earth rotation parameters now

The table is refreshed every 10 seconds 
Parameter TAI time                      Value            Dimension
e1        2026.07.30-21:38:16.9230000   1.771108663D-06  rad 
e2        2026.07.30-21:38:16.9230000   1.068351128D-06  rad 
e3        2026.07.30-21:38:16.9230000   2.697135761D-03  rad 
e1r       2026.07.30-21:38:16.9230000  -2.521404701D-14  rad 
e2r       2026.07.30-21:38:16.9230000   5.112074410D-14  rad 
e3r       2026.07.30-21:38:16.9230000   6.764996152D-14  rad 
e1rr      2026.07.30-21:38:16.9230000   2.908257173D-20  rad 
e2rr      2026.07.30-21:38:16.9230000   1.263879793D-19  rad 
e3rr      2026.07.30-21:38:16.9230000   2.405191671D-18  rad 
utcmtai   2026.07.30-21:38:16.9230000  -37.0000000       s
ut1mtai   2026.07.30-21:38:16.9230000  -36.9870155       s
ut1rat    2026.07.30-21:38:16.9230000  -8.015447586D-05  s/day
lod       2026.07.30-21:38:16.9230000   7.971738005D-05  s
xpol      2026.07.30-21:38:16.9230000   0.220363         arcsec
ypol      2026.07.30-21:38:16.9230000   0.365317         arcsec
xpolr     2026.07.30-21:38:16.9230000   9.110370567D-04  arcsec/d
ypolr     2026.07.30-21:38:16.9230000  -4.493465731D-04  arcsec/d
deps      2026.07.30-21:38:16.9230000    7.9179319       arcsec
dpsi      2026.07.30-21:38:16.9230000    9.3918148       arcsec
mat       2026.07.30-21:38:16.9230000   4.555267331054D-02  -9.989619344047D-01  -8.697506576055D-05   9.989585481561D-01   4.555274537578D-02  -2.601240988479D-03   2.602502682729D-03   3.160899553222D-05   9.999966129846D-01
matr      2026.07.30-21:38:16.9230000   7.284520762770D-05   3.321758635041D-06  -1.895529800431D-07  -3.321753180564D-06   7.284545421437D-05   6.417329628770D-09  -8.096592919607D-11   1.289533341323D-10   2.066386627793D-13
matrr     2026.07.30-21:38:16.9230000  -2.422260954368D-10   5.311974376052D-09   4.677447907565D-13  -5.311956395281D-09  -2.422264926129D-10   1.382218434785D-11  -9.146222463323D-15  -6.107534188352D-15   2.397305467319D-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