【摘要】 本文研究了用共轭梯度法解算天文大地网与空间网联合平差中 ２０ 万阶法方程的有关问题，提出了“系数调整策略”和“平差与求逆既分又合的策略”。利用模拟的天文大地网（４７ ０５７点）和空间网（４７６ 点）在 Ｐ Ｉ Ｉ／２３３ 微机上解算 １４．１ 万阶方程组共迭代 ４ ９９３ 次（收敛至 １×１０－ １８ 角秒），花费机时 ２８ 分 ４７ 秒，与未进行系数调整相比，功效提高 ４０ 多倍。更多还原

【Abstract】 This paper deals with the solution for 200 000 order normal equations in combined adjustment of astro geodetic and space networks by using conjugate gradient method, puts forward a scheme of adjusting the coefficients and a strategy of separation as well as mergence between the adjustment and inversion. It is demonstrated that the solution for 141 000 order normal equations for a simulated astro geodetic network (47 057 points) and a space one (476 points) iterates 4 993 times to converge to 1×10 -18 second, taking 28 min and 47 seconds, on a PII/233 computer, showing over 40 times more efficiency, as compared with the coefficients unadjusted.更多还原