The ARC-Lake mask is available for download from
http://www.geos.ed.ac.uk/arclake/data.html#land_water_mask

MICROS (Monitoring of IR Clear-sky Radiances over Oceans for SST) is a near real time system to monitor and analyze the "Model minus Observation” (M-O) biases in TOA BTs. "Retrieval minus Reynolds” SST biases are also monitored.
http://www.star.nesdis.noaa.gov/sod/sst/micros/