NOAA JPSS Visible Infrared Imaging Radiometer Suite (VIIRS) Volcanic Ash Detection and Height Environmental Data Record (EDR) from NDE

This dataset contains a high quality operational Environmental Data Record (EDR) of volcanic ash from the Visible Infrared Imaging Radiometer (VIIRS) instrument onboard the Suomi-NPP satellite and is produced by the NOAA Satellite and Information Service (NESDIS). The EDR contains two images with pixel values identifying volcanic ash cloud height and volcanic ash mass loading. The product also includes two types of data quality information, one indicator describes the quality of the volcanic ash detection, and the second indicator provides information about the quality and ash characteristics of the retrieval for on-earth pixels. The algorithm utilizes VIIRS sensor data from the M14 (8.55mm), M15 (10.763mm), and M16 (12.013mm) spectral bands and provides global coverage every 12 hours. VIIRS volcanic ash data distributed by the NESDIS Data Exploitation (NDE) system and obtained from the Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as single 86-second granules in NetCDF-4 format with metadata attributes included.

本数据集包含由NOAA卫星与信息服务局（NESDIS）基于Suomi-NPP卫星搭载的可见红外成像辐射计（Visible Infrared Imaging Radiometer, VIIRS）观测数据制作的高质量业务化火山灰环境数据记录（Environmental Data Record, EDR）。该环境数据记录包含两幅图像，其像素值分别用于表征火山灰云顶高度与火山灰质量载荷。该产品还涵盖两类数据质量信息：其一用于描述火山灰检测的质量水平，其二则提供地面像元反演结果的质量及灰羽特性相关信息。本算法使用VIIRS传感器的M14（8.55μm）、M15（10.763μm）以及M16（12.013μm）光谱波段数据，每12小时即可提供一次全球覆盖的数据集。由NESDIS数据开发（NESDIS Data Exploitation, NDE）系统分发、从综合大型阵列数据管理系统（Comprehensive Large Array-Data Stewardship System, CLASS）获取的VIIRS火山灰数据，以包含元数据属性的NetCDF-4格式的单幅86秒数据粒形式进行分发。