The accuracy of the future international celestial reference frame obtained from astrometric satellites: SIM and GAIA are given.
介绍由天体测量卫星GAIA和SIM给出的天球参考架可能逵到的精度。
The accuracy of the future international celestial reference frame obtained from astrometric satellites: SIM and GAIA are given.
介绍由天体测量卫星GAIA和SIM给出的天球参考架可能逵到的精度。
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