A tymczasem Sentinel 3B pokazał swe możliwości obrazowania Ziemi w podczerwieni.
The first image from the Sentinel-3A Sea and Land Surface Temperature Radiometer (SLSTR) thermal-infrared channels depicts thermal signatures over a part of western Namibia and the South Atlantic Ocean. This image shows the ‘brightness temperature’, which corresponds to radiation emitted from the surface. Further processing is needed to turn this into an actual temperature map. The Namibian land surface is shown in red–orange colours, corresponding to a temperature range 301–319 K. The blue colours over the ocean correspond to a temperature range of 285–295 K. The black areas correspond to clouds, which are opaque to thermal-infrared radiation and so prevent a view of the ocean or land surface. Cold water is seen along the Namibian coast that is upwelled from deeper waters. The Benguela current flows north along the west coast of South Africa driven by south-easterly winds forming coastal upwelling. Many eddies and meanders are generated in this complex system and these small-scale features are captured beautifully by SLSTR. Understanding changes in the pattern of these waters is important for fisheries, for example. In the top part of the image over the land, the distinct folds of desert dunes can be seen. In fact, further north, Gobabeb is the location of a land-surface temperature validation site – chosen because of its featureless arid nature and lack of vegetation. The site will be instrumental to monitor the accuracy of the SLSTR instrument during its mission.
Susanne Mecklenburg, ESA's Sentinel-3A mission manager, said, "It is still early days, but the data already look good and we are confident that we will be able to provide high-accuracy surface temperature products so that fine thermal structure both over land and over sea can be detected.
https://www.sciencedaily.com/releases/2016/04/160406125203.htm
Wątek: Program COPERNICUS (Przeczytany 31005 razy)