According to the filter matrix particularity, the filterequation was solved by using conjugate gradient method.
并根据滤波矩阵的特殊性，？用共轭梯度法求解滤波方程。
2
Thirdly, interpolation equation, polynomial interpolation filter and interpolation control for timing adjustment are studied. The performance of interpolation loop is simulated.
最后针对定时调整算法，研究了插值等式、多项式插值滤波器及插值控制，模拟了插值环路的性能。
3
In view of the measurements made by an onboard gravity sensor the Eotvos effect is introduced in the gravity measurement equation of a GPNS optimal filter.