
Its name refers to one of the biggest animals in the sea, but ORCA, the Ocean Radiometer for Carbon Assessment instrument, will be observing the smallest. If selected for a flight mission, ORCA will study microscopic phytoplankton, tiny green plants that float in the upper layer of the ocean and make up the base of the marine food chain.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/94YMlUSwoS4/150210133259.htm