characteristic parameters as comprehensive parameter describing the influence of atmospheric scatter on guide star is put forward. The measurement for the backscatter characteristic parameter in low layer atomosphere at Yunnan Observatory was first carried out in December,1996.The backscatter characteristic parameters of 532nm light in low layer atmosphere were obtained and the analysis for the measured results was carried out. 为正确设计激光导引星系统，提出用大气后向散射特性参数作为描述大气散射等对导引星影响的综合参数，并于1996年12月首次在云南天文台对低层大气进行了后向散射特性参数测量，获得了532nm光的低层大气后向散射特性参数数据，并对测量结果进行了分析 短句来源
Imaging interferometry is widely used in many fields such as remote sensing, resources surveying and atomosphere monitoring.
干涉成像光谱技术在航天遥感、资源普查和大气监测等方面有着重要作用。 短句来源 atomosphere
It's discussed the situation of the use and pollution of chloralkane on dry cleaning process,and analyzed the extensive techonlogy of dry clearing at present in the paper. The results make clearly that tetrachloroethylene is extensive used as the dry cleaning agent,and consume capacity about 300 ton a year in Shenyang. In the dry cleaning process about 98 percent of tetrachloroethylene enters into atomosphere through evaporation and 2 percent enters into soil and water as distillation residuce.
探讨了服装干洗业氯代烃使用情况及污染状况，并分析了目前广泛采用的服装干洗工艺．结果表明，目前服装干洗业全部采用四氯乙烯做干洗剂，沈阳市每年的消耗量在300t左右，干洗过程中约98％的四氯乙烯通过挥发进入大气，2％通过蒸馏残渣排放进入土壤及水体． 短句来源
By analysing the datum about atmosphere pollution and atmosphere quality in Kuitun, Wusu and Dushanzi area, this paper was to evaluate the questions of atmosphere environment and to find the main of them, through calculating and analysing, the paper was to bring the aim of protecting atomosphere ervironment and the main steps of administration.
近年来，随着区