Lake Titicaca (Peru-Bolivia) is a unique large high-altitude tropical lake. It is composed of two almost independent sub-basins, of which the larger and deeper Lago Mayor is monomictic, while the smaller and shallower Lago Menor is polymictic. Although considered oligotrophic, in the last decades, several shallow areas are undergoing accelerated anthropogenic eutrophication, resulting in an increase of floating and submerged macrophytes and in the appearance of dense phytoplankton blooms never observed before. However, despite the unique characteristics of the lake and the worrying trends, during the last decades it has been poorly studied and never monitored. satellite remote sensing is the only tool that can fill this decadel monitoring gap. The pelagic area can be mapped for chlorophyll-a concentration (Chl-a) and Lake Surface Temperature (LST) with daily images of the ocean color sensor MODIS-Aqua (1 km2 pixel size).But for the shallow coastal areas, the higher spatial resolution (30 m) of the Landsat satellites is required.