The global availability of Landsat 5 TM and Landsat 7 ETMÂ + land surface observations and implications for global 30Â m Landsat data product generation

► The impact of clouds and SLC_OFF on availability of clear Landsat land observations. ► Combing Landsat 5 TM and Landsat 7 ETM+ data streams is advantages. ► Compare to ETM+ alone both sensors provide up to 14.4% higher monthly land coverage. ► 36 months of combined Landsat 5 and 7 data can support 30m global land cover mapping.