Holographic Detector for Clouds (HOLODEC 2). Version 1.0

This dataset contains measurements of cloud particle size distributions collected during the HEFT10 project using an airborne holographic instrument (HOLODEC 2) mounted on the NSF/NCAR Gulfstream V (N677F). The data are recorded in a raw video stream that is processed using a MATLAB script to a series of lossless 8-bit grayscale .png files with the filenames serving as the time stamps. Each image file is about 11 or 12 MB from the 4872x3248 8-bit pixels or compressed to about 2/3 of the raw. Images are combined into 1-minute log tarfiles. To help analyze the data, movies (800x600, mpeg4) of each image series are also available.本数据集包含HEFT10项目期间，搭载于美国国家科学基金会/国家大气研究中心（NSF/NCAR）湾流V型飞机（N677F）的机载全息仪器（HOLODEC 2）所采集的云粒子粒径分布测量数据。原始数据以视频流形式记录，通过MATLAB脚本处理为一系列无损8位灰度.png文件，文件名即为对应时刻的时间戳。单张未压缩图像分辨率为4872×3248像素（8位深度），文件大小约11至12MB；若经过压缩，文件大小可降至原始大小的2/3左右。图像将被打包为时长1分钟的日志式tar归档文件。为便于数据分析，本数据集还提供各图像序列对应的视频文件（分辨率800×600，格式为mpeg4）。