Space Very Long Baseline Interferometry (SVLBI) is the unique space technique that can
directly interconnect the main three reference systems for geodesy and geodynamics. However, the
estimable sequence of geodetic parameters including nutation parameters within SVLBI mathematical
model has not been determined yet. In this paper, using the mathematical model of space-ground SVLBI
observations including the nutation parameters derived by WEI Erhu et al.(2008), the estimable
parameter sequence is determined. And the same study is done with space-space SVLBI Observations.
To study the standard deviation of nutation parameters estimated with space-ground SVLBI observations,
the model of variance propagation is derived, with which some numerical tests are done. Finally, the
results are present.
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