应用精密引潮力位展开建立刚体地球章动序列

通过对Melchior P.潮汐与章动理论的改进，给出了高阶日月引潮力位引起的岁差章动力矩，建立了刚体地球极移和章动的联合动力学方程，由此对天球中间极（CIP）进行了严格的理论定义. 在各阶潮汐力矩的作用下，得到CIP轴岁差章动的表达式. 通过推导发现，奇数阶引潮力位产生的岁差章动力矩使得黄经章动和交角章动出现了异向项（即：黄经章动出现了cos项，交角章动出现了sin项）. 最后利用郗钦文精密引潮力位展开，建立了737项刚体地球章动序列. 新的章动序列是IERS2003采用的刚体地球章动序列REN2000（包含678个日月章动项）的一个补充.

Nutation sequence of the rigid Earth determined by expansion of precise tidal generating potential

With the improvement to theory of Melchior P. concerning tide and nutation, we obtain the precession and nutation moment induced by high_order tidal generating potential, and an associated dynamical equation of wobble and nutation for the rigid Earth. Then, we theoretically define CIP of Earth rigorously. Under the effect of every order tidal moment, the expression of precession and nutation for the CIP axis is presented. Theoretical deduction shows that precession and nutation moment induced by odd number order's tidal generating potential cause out_of_phase of longitude and obliquity nutation(namely, there is cos term in longitude nutation, and sin term in obliquity nutation). Finally, using expansion of precise tidal gengrating potential, we establish a new rigid Earth nutation sequence which consists of 737 terms in all. The new nutation sequence is a better complement to the nutation sequence REN2000(it contains 678 solar_lunar nutation terms)of the rigid Earth adopted by IERS2003