Remote Sensing and GIS glossary

In aerial photography or satellite imagery, the point on the ground vertically beneath the perspective center of the camera lens or scanner’s detectors.

Refers to the portion of a radar image closest to the satellite flight path.

Data that is available for use less than 3 hours after the time of observation.

Random or repetitive events that obscure or interfere with the desired information.

Effective backscattering area of a surface in case of plane microwave radiation incident on a scattering object or a scattering medium. It is computed as the ratio of the intensity scattered back in the direction toward the source and the incident irradiance from the source.