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DOI Reference

L2 CLDMSK (Cloud Mask) DOI Reference

Data Object Identifier System

Dataset Short Name:
CLDMSK_L2_MODIS_Aqua  (MODIS Instrument / Aqua Platform)
CLDMSK_L2_VIIRS_SNPP  (VIIRS Instrument / SNPP Platform)

Dataset Long Name:
Continuity MODIS/Aqua Level-2 (L2) Cloud Mask Product
Continuity VIIRS/SNPP Level-2 (L2) Cloud Mask Product

Other Information:
Swath, 1km resolution
MODIS: Five minute time-period granules
VIIRS: Six minute time-period granules
Format: NetCDF4 files


MODIS  (Moderate Resolution Imaging Spectroradiometer)
VIIRS  (Visible Infrared Imaging Radiometer Suite)

Product Description:
The Level-2 Continuity Atmosphere Cloud Mask consists of global cloud mask, quality assurance, and other ancillary parameters. The visible and infrared threshold and consistency tests are used to specify confidence levels that an unobstructed view of the Earth's surface is observed. An indication of shadows affecting the scene is also provided. Cloud Mask parameters are produced at spatial resolution of 1-km at nadir.

Production Frequency:
MODIS: 288 files per day
VIIRS: 240 files per day

Spatial Coverage:

Spatial Resolution:
1x1 km at nadir

File Size:
20 MB

Related Links:
(Atmosphere Imager Continuity Cloud Mask Product)

Data Authors:
Cloud Mask: Steve Ackerman & Rich Frey

Dataset Originator/Creator:
Atmosphere Science Team / Cloud Mask Group
Science Investigator-led Processing Systems (SIPS)


When using Version 1.0 Data:   (File Version 001) 
(To determine the Collection version of the data you used or are using, look at the NetCDF4 filename. If there is a ".001." field in the NetCDF4 filename, then it's Version 1.0 data.)

Dataset DOI:   (Data Object Identifier) (MODIS) (VIIRS)


Citation:   (We kindly request that you cite the use of any Version 1.1 Continuity Atmosphere Cloud data in a publication using the following wording.)

Ackerman, S., R. Frey, 2019. Continuity Atmosphere L2 MODIS Cloud Mask (CLDMSK_L2_MODIS_Aqua), SIPS Processing System, University of Wisconsin, [doi:10.5067/MODIS/CLDMSK_L2_MODIS_Aqua.001; doi:10.5067/MODIS/CLDMSK_L2_MODIS_Aqua.001]

Ackerman, S., R. Frey, 2019. Continuity Atmosphere L2 VIIRS Cloud Mask (CLDMSK_L2_VIIRS_SNPP), SIPS Processing System, University of Wisconsin, [doi:10.5067/VIIRS/CLDMSK_L2_VIIRS_SNPP.001; doi:10.5067/VIIRS/CLDMSK_L2_VIIRS_SNPP.001]