The formulae are simple and practical. Comparisions were mede between datum obtained from actual shop tests and calculated results. the agreement between them is satisfactory.
比较简便实用．并和巳有的现场试验数据进行了比较，计算值和试验结果基本符合。
2
Residual Weighting Algorithm to restrain much amount of NLOS error is proposed. Comparisions in the simulation show that this algorithm has better overall result to restrain much amount of NLOS error.