AIRS/Aqua L3 5-day Quantization in Physical Units (AIRS-only) 5 degrees x 5 degrees V006 (AIRS3QP5) at GES DISC

The Atmospheric Infrared Sounder (AIRS) is a grating spectrometer (R = 1200) aboard the second Earth Observing System (EOS) polar-orbiting platform, EOS Aqua. In combination with the Advanced Microwave Sounding Unit (AMSU) and the Humidity Sounder for Brazil (HSB), AIRS constitutes an innovative atmospheric sounding group of visible, infrared, and microwave sensors. AIRS/Aqua Level 3 pentad quantization product is in physical units (AIRS Only). The quantization products (QP) are distributional summaries derived from the Level-2 standard retrieval products (of swath type) to provide a more comprehensive set of statistical summaries than the traditional means and standard deviation. The QP products combine the Level 2 standard data parameters over grid cells of 5 x 5 deg spatial extent for temporal periods of five days. Pentads always start on the 1st, 6th, 11th, 16th, 21st, and 26th days of the month and may contain as few as 3 days of data or as much as 6 days. They preserve the multivariate distributional features of the original data and so provide a compressed data set that more accurately describes the disparate atmospheric states that is in the original Level-2 swath data set. The geophysical parameters are: Air Temperature and Water Vapor profiles (11 levels/layers), Cloud fraction (vertical distribution).

大气红外探测仪（AIRS）搭载于第二地球观测系统（EOS）极地轨道平台EOS Aqua之上，为一台衍射光谱仪（R值1200）。与高级微波探测单元（AMSU）及巴西湿度探测仪（HSB）结合使用，AIRS构成了一个创新性的大气探测组，该组集成了可见光、红外和微波传感器。AIRS/Aqua Level 3 五日量化产品以物理单位（仅限AIRS）表示。量化产品（QP）为从二级标准检索产品（横截面类型）中派生出的分布概要，相较于传统方法及标准差，提供了一套更为全面的统计汇总。QP产品将二级标准数据参数在5x5度空间范围内的网格单元中进行组合，以五日为时间周期。五日周期始终从每月的1日、6日、11日、16日、21日和26日开始，可能包含最少3天或最多6天的数据。它们保留了原始数据的多元分布特征，因此提供了一种压缩后的数据集，该数据集能更精确地描述原始二级横截面数据集中不同的大气状态。地球物理参数包括：空气温度和水汽剖面（11层/级）、云量（垂直分布）。