Earth Observations from Space: The First 50 Years of Scientific Achievements

Physics – Geophysics

Scientific paper

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1600 Global Change, 1700 History Of Geophysics

Scientific paper

Observing the Earth from space over the last five decades has fundamentally transformed the way people view our home planet. The image of the "blue marble" is taken for granted now, but it was revolutionary when it was first taken in 1972 by the crew on Apollo 17. Since then, the capability to look at Earth from space has grown increasingly sophisticated and evolved from simple photographs to quantitative measurements of Earth properties such as temperature, atmospheric gases, and exact elevation of land and ocean. Consequently, every new method of imaging the Earth from space has resulted in scientific accomplishments that have enabled new discoveries, transformed the field, refined scientific understanding, opened new avenues of research, or provided important societal benefits by improving the predictability of Earth system processes. This National Research Council (NRC) study highlights selected scientific achievements made possible by the first 50 years of Earth satellite observations by space-faring nations. It follows on a recent report from the NRC entitled "Earth Science and Applications from Space: National Imperatives for the Next Decade and Beyond" (NRC 2007), also referred to as the "decadal study."

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