CERES ERBE-like Time-Interpolated TOA Fluxes (ES4) NPP FM-5 Edition2

The ERBE-like Monthly Geographical Averages (ES-4) product contains a month of space and time-averaged Clouds and the Earth's Radiant Energy System (CERES) data for a single satellite using measurements from the primary cross-track instrument. For each observed 2.5-degree spatial region, the daily average, the hourly average over the month, and the overall monthly average of shortwave and longwave fluxes at the Top-of-the-Atmosphere (TOA) from the CERES ES-9 product are spatially nested up from 2.5-degree regions to 5- and 10-degree regions, to 2.5-, 5-, and 10-degree zonal averages, and to global monthly averages. For each nested area, the albedo and net flux are given. For each region, the daily average flux is estimated from an algorithm that uses the available hourly data, scene identification data, and diurnal models. This algorithm is "like" the algorithm used for the Earth Radiation Budget Experiment (ERBE).
CERES is a key Earth Observing System (EOS) program component. The CERES instruments provide radiometric measurements of the Earth's atmosphere from three broadband channels. The CERES missions follow the successful Earth Radiation Budget Experiment (ERBE) mission. The first CERES instrument (PFM) was launched on November 27, 1997, as part of the Tropical Rainfall Measuring Mission (TRMM). Two CERES instruments (FM1 and FM2) were launched into polar orbit on board the EOS flagship Terra on December 18, 1999. Two additional CERES instruments (FM3 and FM4) were launched on board EOS Aqua on May 4, 2002. The CERES instrument (FM5) was launched on board the Suomi National Polar-orbiting Partnership (NPP) satellite on October 28, 2011. The last CERES instrument (FM6) was launched on board the Joint Polar Satellite System 1 (JPSS-1) satellite on November 18, 2017.

类地球辐射收支实验（ERBE-like）月度地理平均（ES-4）数据集产品，包含单颗卫星依托主跨轨仪器观测得到的一个月时空平均云与地球辐射能量系统（CERES）数据。针对每个2.5度空间观测区域，本数据集将地球辐射能量系统ES-9产品中大气层顶（TOA）的短波与长波辐射通量的日平均值、全月逐时平均值以及整体月平均值，从2.5度区域逐级空间聚合至5度、10度区域，进而生成2.5度、5度、10度的纬向平均值，最终得到全球月度平均数据。每个聚合区域均会给出反照率与净辐射通量。对于每个区域，日平均通量通过一种算法估算得出，该算法整合可用的逐时数据、场景识别数据与日循环模型，其算法逻辑与地球辐射收支实验（ERBE）所采用的算法类似。

CERES是地球观测系统（EOS）核心项目的组成部分。该系列仪器通过三个宽带通道对地球大气开展辐射测量。CERES任务接续此前圆满完成的地球辐射收支实验（ERBE）任务。首台CERES仪器（PFM）作为热带降雨测量任务（TRMM）的搭载载荷，于1997年11月27日发射升空。两台CERES仪器（FM1与FM2）随地球观测系统（EOS）旗舰卫星Terra，于1999年12月18日进入极地轨道。另外两台CERES仪器（FM3与FM4）于2002年5月4日随EOS Aqua卫星发射升空。第五台CERES仪器（FM5）于2011年10月28日搭载于苏奥米国家极轨伙伴（NPP）卫星升空。最后一台CERES仪器（FM6）于2017年11月18日随联合极轨卫星系统1号（JPSS-1）卫星发射升空。