The Cloud Profiling Radar (CPR) on CloudSat is a 94-GHz nadir-looking radar which measures the energy backscattered by clouds and precipitation within a 1.5 km across-track by 2.5 km along-track radar footprint and 500m vertical resolution.
云卫星的主要载荷是天底观测的94GHz云廓线雷达(CPR),其横轨分辨率为1.4km,沿轨分辨率为2.5 km,垂直分辨率为500 m。
参考来源 - 星载测云雷达资料的初步分析·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： low-water mark
以上来源于: WordNet
N-SING The nadir of something such as someone's career or the history of an organization is its worst time. (职业生涯或机构历史上的)最低点 [文学性] [usu with poss]
1945 to 1946 was the nadir of Truman's presidency.
1945至1946年是杜鲁门总统生涯的最低点。
N-SING In astronomy, the nadir is the point at which the sun or moon is directly below you, on the other side of the earth. Compare . 天底 [技术] ['the' N]
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