Cloud Masks derived from Mars Daily Global Maps for MRO

This archive contains the cloud masks derived from the color Mars Daily Global Maps (MDGMs) composed from the Mars Reconnaissance Orbiter (MRO) Mars Color Imager (MARCI) wide-angle global map swaths. The procedure used is described in Wang and Gonzalez Abad [2021]. The MDGMs used include slight modifications from those at https://doi.org/10.7910/DVN/U3766S and are included in this archive. The product is at 0.1° longitude × 0.1° latitude resolution and is available for each day from Mars Year 28 Ls = 132° to Mars Year 29 Ls = 135° (i.e., MARCI subphases from P01 to P22 and B01). The data are organized according to subphases with each tar file corresponding to one subphase. Each subphase contains about a month of data and includes a list_ls.txt file, a cloudmask/ subdirectory and a mdgms/ subdirectory. The list_ls.txt file lists the name, Mars year and solar longitude (Ls) value for each MDGM. The MDGMs are in JPEG format. The cloud masks are in NetCDF format, and contains variables named “longitude”, “latitude”, and “cloudmask”. In the cloud masks, -999 Indicates invalid value due to missing or excluded data, 0 indicates non-cloudy pixel and positive values indicate cloudy pixels. The values for cloudy pixels are the adjusted Data Numbers of the blue channels of color MDGMs. For details, please refer to Wang, H. and Gonzalez Abad, G.: Cloud masks derived from Mars Daily Global Maps – An application to the tropical cloud belt on Mars. Submitted to Geosciences, July 2021.