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NSWC 9Z-2
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3.1
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1997 .
3.3.
IERS (International Earth Rotation Service) IAU (International Astronomical Union)
IUGG (International Union of Geodesy and Geophysics).
IERS, 2 IUGG, 1991,
(EOP)
.
IERS
(VLBI, LLR, SLR GPS)
. IERS:
- ITRS (International Terrestrial Reference System);
- ICRS (International Celestial Reference System).
ITRS ITRF (International Terrestrial Reference Frame).
44
ITRF
. 10 , Z
+0,03 " CIO, X 0,003 "
. ITRF
1 – 2 .
ITRF88 ITRF2000.
ICRS 1976 . 1980
J 2000.
1987 IAG (International Association of Geodesy) EUREF
ETRS (European Terrestrial Référence Frame). EUREF , 22 – 25 1996 ,
EUREF. A
,
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ITRS ETRS GPS-
IGS (International GPS Service).
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3.5. 1963 ( -63)
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3.7.
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