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

The level-2 MODIS Temperature and Water Vapor Profile Product MOD07_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 MOD07_L2 and the principal investigator for this product is MODIS scientist Dr. Paul Menzel ( [e-mail]).The MODIS atmospheric profile (MOD07_L2) product contains data that has a spatial resolution (pixel size) of 5 x 5 kilometers (at nadir). Each MOD07_L2 product file covers a five-minute time interval, which means the MOD07_L2 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.

MOD07_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 MOD35_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.
MOD07_L2 Data Group and Parameters: Spatial & Temporal Resolution:
Latitude & LongitudeScan start time

Solar and Sensor Viewing Geometry:

Solar zenith & Solar azimuth angleSensor zenith & Sensor azimuth angle

Static Algorithm Parameters:
MODIS band number; Pressure levels Atmospheric &

Surface Pressure:

Retrieved Geopotential Height ProfileTropopause HeightSurface Elevation, Surface Pressure Atmospheric & Surface Temperature:Guess & Retrieved Temperature ProfilesBrightness Temperature and Skin Temperature

Atmospheric Moisture:

Guess Mixing ratio ProfileRetrieved Dew Point Temperature Profile
Atmospheric Stability Indices:

Total Totals, Lifted Index, and K-index

Atmospheric Trace Gases:

Total Ozone BurdenTotal Column Precipitable Water Vapor - IR RetrievalTotal Column Precipitable Water Vapor - Direct IR RetrievalWater Vapor(Low & High)Retrieved Water Vapour Mixing Ratio Profile Quality Assurance & 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

MODIS二级温度和水汽剖面产品MOD07_L2包含与大气稳定性、大气温度和湿度剖面、总大气水汽和总臭氧相关的30个栅格参数。这些参数均针对白天和夜晚条件，以5公里像素分辨率生成，且至少9个视场无云。大气剖面数据生成于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. mbar）处。水汽参数是对总对流层水汽柱的估计，由MODIS红外对大气湿度剖面进行积分检索得到的清晰场景所形成。热波段9.6微米用于检索总臭氧负荷。该二级MODIS大气剖面产品的简称是MOD07_L2，该产品的首席研究员为MODIS科学家保罗·门泽尔博士（[e-mail]）。MOD07_L2大气剖面（MOD07_L2）产品包含具有5 x 5公里（正对点）空间分辨率（像素大小）的数据。每个MOD07_L2产品文件覆盖五分钟的时间间隔，这意味着MOD07_L2输出网格宽度为270个5公里像素，长度为406个5公里像素，连续九个数据块。每隔第十个数据块，输出网格大小为270 x 408像素。MOD07_L2产品文件以分层数据格式（HDF-EOS）存储。其中28个栅格云参数（5公里像素分辨率）存储为科学数据集（SDS）在文件中，剩余的两个算法静态参数（波段号和压力级）存储为Vdata（表格数组）。云掩码SDS，由1公里MOD35_L2云掩码参数派生，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（波段号和静态压力级）存储为Vdata（表格数组）。每个文件大小约为8 MB，总数据量约为每天2 GB。MOD07_L2数据组和参数：空间与时间分辨率：纬度与经度扫描开始时间太阳与传感器观测几何：太阳天顶角与太阳方位角传感器天顶角与传感器方位角静态算法参数：MODIS波段号；压力级大气与地表压力：检索的位温剖面对流层顶高度地表高程，地表压力大气与地表温度：猜测与检索的温度剖面亮度温度与皮肤温度大气湿度：猜测混合比剖面检索露点温度剖面大气稳定性指数：总总量，上升指数，K指数大气痕量气体：总臭氧负荷总柱状可降水汽——红外检索总柱状可降水汽——直接红外检索水汽（低层与高层）检索水汽混合比剖面质量保证与统计参数：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表征大气、对遥感地表参数进行大气校正以及预测对流云和雷暴至关重要。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