Earth Observing System
![NASA Earth Science Division Operating Missions as of 2 February 2015.This animation shows the orbits of NASA's 2011 fleet of Earth remote sensing observatories](/Images/godic/202501/10/NASA_Earth_Science_Division_Operating_Missions3502.jpg")
![](/Images/godic/202501/10/-NASA's_2011_fleet_of_Earth_remote_sensing_observatories.ogv3502.jpg")
The Earth Observing System (EOS) is a program of NASA comprising a series of artificial satellite missions and scientific instruments in Earth orbit designed for long-term global observations of the land surface, biosphere, atmosphere, and oceans of the Earth. The satellite component of the program was launched in 1997. The program is centerpiece of NASA's Earth Science Enterprise (ESE).