MOD06_L2 - MODIS/Terra Clouds 5-Min L2 Swath 1km and 5km

These data are a copy of MODIS data from the NASA Level-1 and Atmosphere Archive & Distribution System (LAADS) Distributed Active Archive Center (DAAC). The copy is potentially only a subset. Below is the description from https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/MOD06_L2

The MODIS Level-2 Cloud product consists of cloud optical and physical parameters. These parameters are derived using remotely sensed infrared, visible and near infrared solar reflected radiances. MODIS infrared channel radiances are used to derive cloud top temperature, cloud top height, effective emissivity, cloud phase (ice vs. water, opaque vs. non-opaque), and cloud fraction under both daytime and nighttime conditions. MODIS visible radiances are used to derive cloud optical thickness and effective particle radius and cloud shadow effects. Near-infrared solar reflected radiance provides additional information for the retrieval of cloud particle phase (ice vs. water, clouds vs. snow). The shortname for this Level-2 MODIS cloud product is MOD06_L2. MOD06_L2 consists of parameters at a spatial resolution of either 1km or 5km (at nadir). Each MOD06_L2 product file covers a 5-minute time interval. This means that for 5km resolution parameters, the output grid is 270 pixels wide by 406 pixels in length. Every tenth granule has an output grid size of 270 by 408 pixels. For 1-km resolution parameters, the output grid is 1354 pixels in width by 2030 pixels in length and every tenth granule has an output grid size of 1354 by 2040 pixels.

MOD06_L2 product files are stored in Hierarchical Data Format (HDF-EOS). All gridded cloud parameters are stored as Scientific Data Sets (SDS) within the file, except two (band number and statistics). These are stored as Vdata (table arrays). Approximately 288 files are produced daily. Nighttime files are smaller than their daytime counterparts since only the cloud top properties are retrieved at night.

The MODIS Cloud Product will be used to investigate seasonal and inter-annual changes in cirrus (semi-transparent) global cloud cover and cloud phase with multispectral observations at 1km spatial resolution.

For additional details see the MODIS Atmospheres web site page onCollection 6.1 Updates.

Shortname: MOD06_L2 , Platform: Terra , Instrument: MODIS , Processing Level: Level-2 , Spatial Resolution: 1 km , Temporal Resolution: 5 minute , ArchiveSets: 61 , Collection: MODIS Collection 6.1 - Level 1, Atmosphere, Land (ArchiveSet 61) , PGE Number: PGE06 , File Naming Convention: MOD06_L2.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.hdf AYYYYDDD = Acqusition Year and Day of Year HHMM = Hour and Minute of acquisition CCC = Collection number YYYYDDDHHMMSS = Production Date and Time AYYYYDDD = Year and Day of Year of acquisition , Citation: Platnick, S., Ackerman, S., King, M., et al., 2015. MODIS Atmosphere L2 Cloud Product (06_L2). NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: http://dx.doi.org/10.5067/MODIS/MOD06_L2.061 , Keywords: Water Vapor, Precipitable Water

本数据集为美国国家航空航天局（NASA）MODIS（中分辨率成像光谱仪）Level-1和大气存档与分发系统（LAADS）分布式主动存档中心（DAAC）的数据副本。此副本可能仅为子集。以下描述摘自https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/MOD06_L2。

MODIS Level-2云产品包含云的光学和物理参数，这些参数通过遥感探测的红外、可见光和近红外太阳反射辐射率推导而成。MODIS红外通道辐射率用于推导云顶温度、云顶高度、有效发射率、云相（冰对水、不透明对半透明）以及白天和夜晚条件下的云量。MODIS可见光辐射率用于推导云光学厚度、有效粒子半径和云阴影效应。近红外太阳反射辐射率提供了云粒子相（冰对水、云对雪）检索的额外信息。本Level-2 MODIS云产品的简称是MOD06_L2。MOD06_L2包含1公里或5公里（正下方）空间分辨率的参数。每个MOD06_L2产品文件覆盖5分钟的时间间隔。这意味着对于5公里分辨率的参数，输出网格宽度为270像素，长度为406像素。每第十个颗粒的输出网格大小为270像素×408像素。对于1公里分辨率的参数，输出网格宽度为1354像素，长度为2030像素，每第十个颗粒的输出网格大小为1354像素×2040像素。

MOD06_L2产品文件以分层数据格式（HDF-EOS）存储。所有网格化云参数存储为科学数据集（SDS）文件内部，除两个（波段编号和统计数据）外，这些数据存储为Vdata（表数组）。大约每天生成约288个文件。夜间文件比白天文件小，因为夜间只检索云顶属性。

MODIS云产品将用于研究使用1公里空间分辨率的多元光谱观测法，全球半透明（半透明）云覆盖和云相的季节和年际变化。

更多详细信息请参阅MODIS大气网页上关于Collection 6.1更新的页面。

简称：MOD06_L2，平台：Terra，仪器：MODIS，处理级别：Level-2，空间分辨率：1公里，时间分辨率：5分钟，存档集：61，系列：MODIS Collection 6.1 - Level 1，大气，陆地（存档集61），PGE编号：PGE06，文件命名约定：MOD06_L2.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.hdf。其中，AYYYYDDD表示获取年份和年日，HHMM表示获取的小时和分钟，CCC表示系列编号，YYYYDDDHHMMSS表示生产日期和时间，AYYYYDDD表示获取年份和年日。

引用：Platnick, S., Ackerman, S., King, M., et al., 2015. MODIS大气L2云产品（06_L2）。NASA MODIS自适应处理系统，戈达德太空飞行中心，美国：http://dx.doi.org/10.5067/MODIS/MOD06_L2.061。

关键词：水汽，可降水量。