Ground Sampling Distance
Encyclopedia
Ground Sampling Distance (GSD) is the physical measure of the level of detail of data collection for remote digital imaging of the surfaces of terrestrial objects of the Solar System
, including the Earth
.
The Ground Sampling Distance is the measure of the distance between two adjacent samples in an image. In some cases it is confused with resolution
, a related measure. The GSD may vary dependent on the direction of sampling of the optical instrument, and the instrument geometry.
Some resolutions include:
Solar System
The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. The vast majority of the system's mass is in the Sun...
, including the Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
.
The Ground Sampling Distance is the measure of the distance between two adjacent samples in an image. In some cases it is confused with resolution
Image resolution
Image resolution is an umbrella term that describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. Higher resolution means more image detail....
, a related measure. The GSD may vary dependent on the direction of sampling of the optical instrument, and the instrument geometry.
Some resolutions include:
- ASTERAdvanced Spaceborne Thermal Emission and Reflection RadiometerASTER is a Japanese sensor which is one of five remote sensory devices on board the Terra satellite launched into Earth orbit by NASA in 1999...
(on board TerraTerra (satellite)Terra is a multi-national NASA scientific research satellite in a sun-synchronous orbit around the Earth. It is the flagship of the Earth Observing System...
in Earth orbit): 15-90 m. - UK-DMC 1 (of the Disaster Monitoring ConstellationDisaster Monitoring ConstellationThe Disaster Monitoring Constellation consists of a number of remote sensing satellites constructed by Surrey Satellite Technology Ltd and operated for the Algerian, Nigerian, Turkish, British and Chinese governments by DMC International Imaging...
): 32m. - UK-DMC 2UK-DMC 2UK-DMC 2 is a British Earth imaging satellite which is operated by DMC International Imaging. It was constructed by Surrey Satellite Technology, based on the SSTL-100 satellite bus. It is part of Britain's contribution to the Disaster Monitoring Constellation, which is coordinated by DMC...
(of the Disaster Monitoring ConstellationDisaster Monitoring ConstellationThe Disaster Monitoring Constellation consists of a number of remote sensing satellites constructed by Surrey Satellite Technology Ltd and operated for the Algerian, Nigerian, Turkish, British and Chinese governments by DMC International Imaging...
): 22m.