It is useful for selecting reasonable system parameters through it . for the data process in dial system , we discussed the combined effects of temporal autocorrelation and lasers cross correlation and signal averaging 对于dial系统中的数据处理,本文着重讨论了信号平均技术和激光器回波信号时域自相关以及激光器互相关对co2dial系统测量灵敏度的影响。