As we know , there exist some defects in solving normal equation system . in order to overcome the shortcomings , the singular - value decomposition method and its applications in direct solving the ill - conditioning observation equation are studied 最后針對(duì)法方程解算方法存在的缺點(diǎn),主要研究了矩陣的奇異值分解技術(shù)在直接解算病態(tài)觀(guān)測(cè)方程中的應(yīng)用。