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Cloud Properties

Overview

The MODIS Cloud Product combines infrared and visible techniques to determine both physical and radiative cloud properties. Daily global Level-2 data are provided. Cloud-particle phase (ice vs. water, clouds vs. snow), effective cloud-particle radius, and cloud optical thickness are derived using the MODIS visible and near-infrared channel radiances. An indication of cloud shadows affecting the scene is also provided. Cloud-top temperature, height, effective emissivity, phase (ice vs. water, opaque vs. non-opaque), and cloud fraction are produced by the infrared retrieval methods both day and night at 5x5 1-km-pixel resolution. Finally, the MODIS Cloud Product includes the cirrus reflectance in the visible at the 1-km-pixel resolution, which is useful for removing cirrus scattering effects from the land-surface reflectance product. There are two MODIS Cloud data product files: MOD06_L2, containing data collected from the Terra platform, and MYD06_L2, containing data collected from the Aqua platform.

Product Information

Product Details


Product Name Terra Prod ID/DAAC Link Aqua Prod ID/DAAC Link
Clouds 5-Min L2 Swath 1km and 5km MOD06_L2 MYD06_L2

All LAADS Cloud Properties data products are accessible via the LAADS product search page.

Overview

Cloud properties exemplify a number of attributes: Cloud optical thickness, cloud-particle phase, cloud particle effective radius, cloud-top temperature, height, cloud thermodynamic phase, cloud fraction, etc. The Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS) NASA Level-2 (L2) Cloud Properties suite comprises two continuity products that are designed to sustain the long-term records of both VIIRS and Moderate Resolution Imaging Spectroradiometer (MODIS) heritages. The original MODIS cloud-top and cloud optical properties algorithms (MOD06 suite) benefit from certain MODIS-specific thermal infrared, water vapor and CO2 absorption channels. The lack of such spectral channels in the VIIRS instrument prevents directly porting the original MODIS algorithms to VIIRS. To ensure a commonly applicable continuity approach to data from both VIIRS and MODIS missions, the CLDPROP algorithm was developed that leverages spectral channels that are common to both instruments. Two cloud properties products exist: the SNPP VIIRS L2 Cloud Properties, and the Aqua MODIS L2 Cloud Properties.

Product Information

Product Details


MODIS Product Name Aqua Prod ID/DAAC Link
Cloud Properties 5-Min Swath 1000 m CLDPROP_L2_MODIS_Aqua

All LAADS Cloud Properties data products are accessible via the LAADS product search page.


VIIRS Product Name VIIRS Prod ID/DAAC Link
Cloud Properties 6-Min Swath 750 m CLDPROP_L2_VIIRS_SNPP

All LAADS Cloud Properties data products are accessible via the LAADS product search page.

Last updated: August 26, 2019