VIIRS/JPSS1 Granular Gridded Day Night Band 500m Linear Lat Lon Grid Night NRT

The Near Real Time (NRT) NOAA-20 - formerly the Joint Polar Satellite System-1 (JPSS-1) Visible Infrared Imaging Radiometer Suite (VIIRS) hourly top-of-atmosphere, at-sensor nighttime radiance product called VIIRS/NPP Granular Gridded Day Night Band 500m Linear Lat Lon Grid Night. Known by its short-name, VJ146A1G_NRT, is same as VJ146A1_NRT except that this product is generated hourly, cumulative from start of day through the hour the file is generated for. This product contains 26 Science Data Sets (SDS) that include sensor radiance, zenith and azimuth angles (at-sensor, solar, and lunar), cloud-mask flags, time, shortwave IR radiance, brightness temperatures, VIIRS quality flags, moon phase angle, and moon illumination fraction. It also provides Quality Flag (QF) information specific to the cloud-mask, VIIRS moderate-resolution bands M10, M11, M12, M13, M15, M16, and DNB.

本数据集为近实时（NRT）NOAA-20（原称联合极地卫星系统-1（JPSS-1）可见光红外成像辐射计套装（VIIRS））小时级大气顶面、传感器夜间辐射亮度产品，称为VIIRS/NPP颗粒化栅格日夜波段500米线性经纬度网格夜间产品。简称VJ146A1G_NRT，与VJ146A1_NRT相同，区别在于本产品为每小时生成，自每日起始至生成文件时的小时累计。该产品包含26个科学数据集（SDS），包括传感器辐射亮度、天顶和方位角（传感器、太阳和月亮）、云掩码标志、时间、短波红外辐射亮度、亮度温度、VIIRS质量标志、月亮相位角以及月亮照度分数。同时，它还提供针对云掩码、VIIRS中分辨率波段M10、M11、M12、M13、M15、M16和DNB的质量标志（QF）信息。