Skip to main content
Article thumbnail
Location of Repository

Cross-Comparison of MODIS and CloudSat Data as a Tool to Validate Local Cloud Cover Masks

By Francesco Posa, Claudia Notarnicola and Daniela Di Rosa


This paper presents a cross-comparison of the data acquired by the MODIS and CloudSat sensors in order to understand the limit of the developed cloud-mask algorithm and to provide a quantitative validation assessment of cloud masks by using exclusively remotely sensed data. The analysis has been carried out by comparing both the intermediate levels of the cloud mask such as the brightness temperatures and the reflectance values for different channels, and the cloud mask itself with the cloud profiles as measured by the CloudSat sensor. The comparison between MODIS cloud tests and the CloudSat profiles indicates an agreement with hit rates (H) and Hanssen-Kuiper Skill Score (KSS) varying between 0.7 and 1.0 and 0.4 and 1.0, respectively. In this case, the low values of H and KSS are found due to the limitation of CloudSat to detect low clouds. The comparison between the cloud mask and the CloudSat profile determines H and KSS values between 0.6 and 1, except for one case. The CloudSat profile has also been compared with the Standard MODIS cloud mask in order to understand the improvement obtained in the use of local adapted thresholds. A comparison of MODIS and CALIPSO data is also presented

Topics: cloud mask, MODIS, CloudSat, A-train, validation, LCC:Meteorology. Climatology, LCC:QC851-999, LCC:Physics, LCC:QC1-999, LCC:Science, LCC:Q, DOAJ:Meteorology and Climatology, DOAJ:Earth and Environmental Sciences
Publisher: Molecular Diversity Preservation International
Year: 2011
DOI identifier: 10.3390/atmos2030242
OAI identifier:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • (external link)
  • Suggested articles

    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.