BUV/Nimbus-4 Ozone (O3) Nadir Profile and Total Column 1 Day L2 V1 (BUVN04L2) at GES DISC

The Solar Backscattered Ultraviolet (SBUV) from Nimbus-4 Level-2 daily product (BUVN04L2) contains ozone nadir profile and total column data from retrievals generated from the v8.6 SBUV algorithm. The v8.6 SBUV algorithm estimates the ozone nadir profile and total column from SBUV measurements using 1) the Brion-Daumont-Malicet ozone cross sections, 2) an OMI-derived cloud-height climatology, 3) a revised a priori ozone climatology, and 4) inter-instrument calibration based on comparisons with no local time difference.

The BUVN04L2 product is written as daily files using the HDF5 format, with file sizes ranging from about 1 to 5 Mbytes. Data are available from May 1970 through April 1976. The BUVN04L2 data product was used as input in creating the BUVN04L3zm monthly zonal mean data product.

Nimbus-4卫星第二级水平的Solar Backscattered Ultraviolet (SBUV)数据集（BUVN04L2）包含了通过v8.6 SBUV算法生成的臭氧柱面廓线及总柱量数据。v8.6 SBUV算法通过以下方法估算臭氧柱面廓线及总柱量：1) 采用Brion-Daumont-Malicet臭氧交叉截面；2) 基于OMI卫星数据的云高气候学；3) 修订后的先验臭氧气候学；4) 基于与无地方时差异的比较进行的仪器间校准。BUVN04L2产品采用HDF5格式编写为每日文件，文件大小介于1至5兆字节之间。数据覆盖时间从1970年5月到1976年4月。该BUVN04L2数据产品被用作构建BUVN04L3zm月度区域平均数据产品的输入。