OMI卫星传感器的对二氧化氮的反演产品，该手册针对的是level 2级别的产品，对该产品的数据结构和算法做了详细介绍。 -This is the product of the satellite sensor called OMI, and is a retreived product of nitrogen dioxide (NO2). The manual is for level 2 level products. And the product' s data structures and algorithms are introduced in detail.