What does EESS mean in NASA?

Earth exploration-satellite service

Earth exploration-satellite service (also: meteorological-satellite radiocommunication service) is – according to Article 1.51 of the International Telecommunication Union´s (ITU) Radio Regulations (RR) – defined as «A radiocommunication service between earth stations and one or more space stations, which may include links between space stations, in which: information relating to the characteristics of the Earth and its natural phenomena, including data relating to the state of the environment, is obtained from active sensors or passive sensors on Earth satellites; similar information is collected from airborne or Earth-based platforms; such information may be distributed to earth stations within the system concerned; platform interrogation may be included.This service may also include feeder links necessary for its operation.» See also

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