MODIS/Aqua Temperature and Water Vapor Profiles 5-Min L2 Swath 5km - NRT

The level-2 MODIS Temperature and Water Vapor Profile Product MYD07_L2 consists of 30 gridded parameters related to atmospheric stability, atmospheric temperature and moisture profiles, total atmospheric water vapor, and total ozone. All of these parameters are produced for both daytime and nighttime conditions at 5-km pixel resolution when at least 9 FOVs are cloud free.

The atmospheric profiles are produced at 20 vertical atmospheric levels (5., 10., 20., 30., 50., 70., 100., 150., 200., 250., 300., 400., 500., 620., 700., 780., 850., 920., 950., 1000. mbar) The water vapor parameter is an estimate of the total tropospheric column water vapor made from integrated MODIS infrared retrievals of atmospheric moisture profiles in clear scenes. The thermal band 9.6 micron is used for retrieving total ozone burden.

The shortname for this Level-2 MODIS atmospheric profile product is MYD07_L2 and the principal investigator for this product is MODIS scientist Dr. Paul Menzel ( [e-mail]).The MYD07_L2 product contains data that has a spatial resolution (pixel size) of 5 x 5 kilometers (at nadir). Each MYD07_L2 product file covers a five-minute time interval, which means that the output grid is 270 5-km pixels in width and 406 5-km pixels in length for nine consecutive granules. Every tenth granule has an output grid size of 270 by 408 pixels.

MYD07_L2 product files are stored in Hierarchical Data Format(HDF-EOS). Twenty eight of the 30 gridded cloud parameters(5-kilometer pixel resolution) are stored as Scientific Data Sets (SDS) within the file, the remaining two algorithmic static parameters (band number and presure level) are stored as Vdata(table arrays). Cloud Mask SDS, derived from the 1-km MYD35_L2 Cloud Mask parameter, is remapped to 5-km resolution, by using only the center 1-km pixel in the 5x5 pixel retrieval array. The remaining two (band number and static pressure levels) are stored as Vdata(table arrays) Each file is roughly 8 MB in size, and the total data volume is approximately 2 GB/day.
MYD07_L2 Data Group and Parameters:
Spatial and Temporal Resolution:
Latitude and Longitude
Scan start time

Solar and Sensor Viewing Geometry:

Solar zenith and Solar azimuth angle
Sensor zenith and Sensor azimuth angle

Static Algorithm Parameters:
MODIS band number
Pressure levels Atmospheric

Surface Pressure:

Retrieved Geopotential Height Profile
Tropopause Height
Surface Elevation
Surface Pressure

Atmospheric and Surface Temperature:
Guess and Retrieved Temperature Profiles
Brightness Temperature and Skin Temperature

Atmospheric Moisture:

Guess Mixing ratio Profile
Retrieved Dew Point Temperature Profile

Atmospheric Stability Indices:

Total Totals, Lifted Index, and K-index

Atmospheric Trace Gases:

Total Ozone Burden
Total Column Precipitable Water Vapor - IR Retrieval
Total Column Precipitable Water Vapor - Direct IR Retrieval
Water Vapor(Low and High)
Retrieved Water Vapour Mixing Ratio Profile

Quality Assurance and Statistical Parameters:

Quality Assurance Parameters
Run time QA flags
MODIS Cloud Mask Processing Flag

These parameters are very essential in the characterization of the atmosphere, atmospheric correction of remotely sensed surface parameters, and prediction of convective clouds and thunderstorms.

For more information about the MOD07_L2 product, visit the MODIS-Atmosphere site at:

https://modis-atmos.gsfc.nasa.gov/products/atm-profile

MYD07_L2二级MODIS温度和水汽剖面产品包括与大气稳定性、大气温度和湿度剖面、总大气水汽以及总臭氧相关的30个网格化参数。这些参数均在至少9个视场无云的情况下，针对白天和夜晚条件以5公里像素分辨率为条件生成。大气剖面在20个垂直大气层（5., 10., 20., 30., 50., 70., 100., 150., 200., 250., 300., 400., 500., 620., 700., 780., 850., 920., 950., 1000.毫巴）生成。水汽参数是通过对清晰场景中大气湿度剖面进行MODIS红外反演的总对流层水汽柱的估计。热波段9.6微米用于提取总臭氧负荷。该二级MODIS大气剖面产品的简称是MYD07_L2，该产品的首席研究员为MODIS科学家保罗·门策尔博士（[e-mail]）。MYD07_L2产品包含具有5 x 5公里（正下方）空间分辨率的（像素大小）数据。每个MYD07_L2产品文件覆盖五分钟的时间间隔，这意味着输出网格为270个5公里像素宽和406个5公里像素长，由九个连续的子数据集组成。每隔第十个子数据集，输出网格大小为270 x 408像素。MYD07_L2产品文件以层次数据格式（HDF-EOS）存储。其中28个（5公里像素分辨率）的30个网格化云参数存储为文件内的科学数据集（SDS），其余两个算法静态参数（波段编号和压力水平）存储为Vdata（表格数组）。云掩码SDS（源自1公里MYD35_L2云掩码参数）通过仅使用5x5像素检索数组中的中心1公里像素进行重映射至5公里分辨率。其余两个（波段编号和静态压力水平）存储为Vdata（表格数组）。每个文件的大小约为8MB，总数据量约为每天2GB。MYD07_L2数据组和参数：空间和时间分辨率：纬度和经度；扫描开始时间；太阳和传感器观测几何：太阳天顶角和太阳方位角；传感器天顶角和传感器方位角；静态算法参数：MODIS波段编号；大气压力层；地表压力；获取的位势高度剖面；对流层顶高度；地表高程；地表压力；大气和地表温度：估计和获取的温度剖面；亮度温度和皮肤温度；大气湿度：估计混合比剖面；获取的露点温度剖面；大气稳定性指数：总量、抬升指数和K指数；大气痕量气体：总臭氧负荷；总水汽柱可降水量——红外反演；总水汽柱可降水量——直接红外反演；水汽（低和高）；获取的水汽混合比剖面；质量保证和统计参数：质量保证参数；运行时QA标志；MODIS云掩码处理标志。这些参数对于大气特征描述、遥感地表参数的大气校正以及对流云和雷暴的预测至关重要。有关MOD07_L2产品的更多信息，请访问MODIS-大气网站：https://modis-atmos.gsfc.nasa.gov/products/atm-profile