The relation between the error ofnutationconstant and the corrections of declinations, proper motions calculated by chain method is analysed, and the method to correct this effect is considered.
分析了章动常数误差与用连锁法计算的赤纬、自行改正之间的关系，并考虑了改正这种影响的方法。
2
The stability criteria and the decay time constantof the nutation damping are obtained in an analytical form, by which the degree of the attitude stability can bd evaluated.