ES 771 Lecture
James S. Aber


Remote sensing is the science and art of gathering information about an object from a distance. In other words, measurements or observations are taken without making direct physical contact with the object in question. For this course, the focus will be on remote sensing of the Earth's surface from above--aerial or space vantages. The electromagnetic spectrum is the energy that carries information through the atmosphere from the Earth's surface to the sensing device.

Taken from EROS Data Center.

Passive methods, such as film or digital photography and multispectral scanning, gather the ambient energy available. Active systems, namely radar or lidar, supply their own energy to illuminate the scene. Attributes of "ideal" and "actual" remote sensing are summarized below based on Lillesand and Kiefer (1994).

Ideal Remote Sensing

Actual Remote Sensing


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© Notice: ES 771 is presented for the use and benefit of students enrolled at Emporia State University. Any other use of text, imagery or curriculum materials is prohibited without permission of the instructor. Last update 2016.