Title :
Thermal emission from rough terrain: anisotropy and its possible consequences on satellite image interpretation
Author_Institution :
Finnish Geodetic Inst., Masala, Finland
Abstract :
The thermal emission from a rough terrain is generally not equal in all directions, due to variations in surface temperature. These variations can be caused by differing exposition to sunshine, wind, or moisture etc. In this paper the author studies the effects of a non-uniform surface temperature on the anisotropy of the surface´s thermal emission, and the consequences it may have on the interpretation of satellite images. The temperature distributions are hypothetical, i.e. not yet measured in nature, but the examples indicate that more information could be derived from satellite images than is currently being done. One could erroneously interpret two pixels of an image being of different types of terrain, when the differing signal is partly or entirely due to anistropic emission
Keywords :
geophysical signal processing; geophysical techniques; infrared imaging; inverse problems; remote sensing; terrestrial heat; IR imaging; anisotropy; geophysical measurement technique; inverse problem; land surface; remote sensing; rough terrain; satellite image interpretation; terrain mapping; terrestrial heat; thermal imaging; Anisotropic magnetoresistance; Azimuth; Current measurement; Land surface temperature; Moisture; Rough surfaces; Satellites; Sun; Surface roughness; Temperature distribution;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International
Conference_Location :
Lincoln, NE
Print_ISBN :
0-7803-3068-4
DOI :
10.1109/IGARSS.1996.516898
