This data set is only available for a restricted user group, please contact us if you want to access these data.
Coverage, spatial and temporal resolution
Period and temporal resolution:
- 2000-02-24 to 2019-02-28 (MODIS EOS-TERRA)
- 2002-07-04 to 2019-02-28 (MODIS EOS-AQUA)
- 2003-01 to 2015-12 (MODIS EOS-AQUA CDNC)
Coverage and spatial resolution:
- Spatial resolution: 1° x 1°, cartesian grid
- Geographic longitude: 180°W to 180°E
- Geographic latitude: 90°S to 90°N
- Dimension: 360 columns x 180 rows
- Altitude: following terrain
- TERRA: August 7-18 2000; June 16 - July 2 2001; March 20-27 & April 15 2002; December 21-22 2008
- AQUA: July 30 - August 6 2002
The offered gridded Level-3 cloud property data contain as a measure of uncertainty the standard deviation of all level-2 grid cells used for the computation of the level-3 product.
For some of the products the confidence flags of the level-2 products are used to come with with uncertainty estimates (as described in the level-3 data ATBD). In contrast to the MODIS Aerosol Properties product, no histograms about data quality are provided.
This data set is from Collection 6.1 of the MODIS collection 6 product family. Hence a substantial number of inconsistencies and potential retrieval problems, which have been identified in the past product versions (4, 5), has been taken care of in this newest MODIS product release. In addition several new variables are included, e.g. 1) cloud top height, 2) cirrus / high cloud fraction, 3) joint histograms of all cloud top parameters with the cloud top pressure, 4) retrievals of cloud water path, particle effective radius, optical thickness, and fractions also for partly cloudy pixels, and finally, 5) separate retrievals of these parameters for MODIS bands at 1.6 µm, at 3.7 µm, and 1.6 and 2.1 µm combined.
The effect of radiometric calibration drift of MODIS EOS-TERRA band 29 (8.6 µm) as well as other effects of the sensor, such as cross-talk between adjacent frequency bands, on the data products have been mitigated in this newest collection 6.1 product.
We refer to the documents listed in the References.
MODIS - Atmosphere Level-3 Product Group
NASA / GSFC
email: steve.platnick (at) nasa.gov
MODIS - Cloud Optical Properties
NASA / GSFC
email: gala.wind (at) nasa.gov
MODIS - Cloud Top Properties
Space Science Engineering Center (SSEC) / WISC
email: richard.frey (at) ssec.wisc.edu
ICDC / CEN / University of Hamburg
email: stefan.kern (at) uni-hamburg.de
Please cite the data as follows:
Platnick, S., et al., 2017. MODIS Atmosphere L3 Daily Product. NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: http://dx.doi.org/10.5067/MODIS/MOD08_D3.061, last access date: 5/3/2019
(if MODIS EOS-AQUA data are used accordingly: dx.doi.org/10.5067/MODIS/MYD08_D3.061)
and acknowledge the source of your data download as:
Original MODIS collection 6.1 cloud parameter data provided in hdf format by https://ladsweb.modaps.eosdis.nasa.gov/ were downloaded in netCDF file format from the Integrated Climate Data Centre (ICDC), CliSAP/KlimaCampus, University of Hamburg, Hamburg, Germany, http://icdc.cen.uni-hamburg.de
For the CDNC data set please refer the the paper by Bennartz and Rausch (see above).