中文摘要：

2008年5月至12月中美（美国能源部大气辐射测量（ARM）计划）联合利用ARM移动观测设施（AMF）在安徽省寿县进行了大气辐射综合观测试验，地基云参数观测仪器主要有：（1）云雷达（ARMW-band（95GHz）Cloud Radar），观测结果为反射率廓线，时间分辨率为2S；（2）云高仪（Vaisala Ceilometer），观测结果为云底高度和后向散射廓线，时间分辨率为15S。两者均为天顶方向观测。扫描式全天空红外成像仪（SIRIS．1型）于11月27日～12月30日在寿县参加了观测，观测方式为全天空扫描，时间间隔为15分钟。三种云观测仪器共并行观测16天。利用全天空红外成像仪测得的天空红外亮温和同步观测的地面气象数据进行了等效云底高的反演。以全天空红外成像仪天顶方向观测时间前后15次云雷达反射率廓线的平均廓线，云高仪12次观测中有云时次云底高的平均值分别作为同步观测结果，利用平均反射率廓线进行了各层云的云底、云顶、回波峰值高度和回波积分值的提取和计算。三种观测仪器以10km云底高为限，共同步观测1661次，其中云雷达、红外成像仪和云高仪分别观测到云：428，287，225次。本文分3种情况：（1）全部有云观测情况，（2）单层云，（3）双层及三层云，分别进行了三个仪器观测云高的对比。对比结果：情况（1），云雷达与云高仪、云雷达与红外成像仪的相关系数分别为0．6和0．82；情况（2），三者共同观测75次，云雷达与红外成像仪相关系数为0．85，与云高仪相关系数为0．53，标准差分别为0．88和1．61km；情况（3），红外成像仪云底高绝大多数在云雷达观测的最上、最下层云之间，有时接近上层云，有时接近下层云。对比结果显示，地基热红外对于观测中低云高具有稳定、可靠、经济和便捷等优势，但观测结果较云雷达系统偏高。文中同?

英文摘要：

The Atmospheric Radiation Measurement （ARM） Mobile Facility （AMF） was deployed in Shouxian, Anhui Province, China from May to December 2008. ARM W-band （95 GHz） Cloud Radar （WACR） and Vaisala Ceilometer （VCEIL） are ground-based instrttments used to probe the vertical structure of clouds. The temporal resolution of reflectivity profile from WACR is 2 s. VCEIL can give cloud base height and backscatter profile, with the temporal resolution of 15 s. Both of them make zenith-pointing measurements. During the AMF campaign, the measurements of the whole sky thermal infrared brightness temperature were conducted from November 27 to December 30, 2008 at the same place, using an automatic scanning infrared thermometer （SIRIS-1） developed by the Key Laboratory of Middle Atmosphere and Global Environment Observation （LAGEO）, Institute of Atmospheric Physics, Chinese Academy of Sciences, the temporal resolution is 15 minutes. The three instruments made paratactic measurements for total 16 days, and the comparisons are made between the results. The SIRIS-1 effective cloud base height was calculated by using the data of sky brightness temperature and the surface weather data observed at the same time. The VCEIL cloud base heights were averaged over a 3-minute interval centered at the time of each SIRIS-1 zenith-pointing measurement, and the WACR macro cloud properties were retrieved from the average reflectivity profile of 15 measurements around that time. A total of 1661 measurements were synchronously made by the three instruments, which including 428, 287, 225 times of cloud measurements by WACR, SIRIS-1, and VCEIL, respectively. Three sets of cloud base height data were analyzed： all of the data, single-layered and two- or three-layered cloud data. For all the data, the correlation coefficient between WACR and SIRIS-1 （287 samples） is 0.82, and that between WACR and VCEIL （225 samples） is 0.6. For single-layered, on the basis of a total of 75 samples, the standard deviations of the dif