Putting science
at the heart of development
Definitions
Below is a directory of terms used in discussions about remote sensing for natural disasters. Most of the terms have been reproduced from the Canada Centre for Remote Sensing and the UN Department of Humanitarian Affairs.
New technologies have the potential to accelerate a country's development, but a global technology gap remains.
T
Thematic Mapper
A high-resolution scanner system on board the Landsat-4 and Landsat-5 satellites. Landsat 7 carries the ETM or Enhanced Thematic Mapper sensor.
Thermal band
A general term for middle-infrared wavelengths which are transmitted through the atmosphere window at 8–13 micrometers. Occasionally also used for the windows around 3–6 micrometers.
Tsunami
A series of large waves generated by sudden displacement of seawater (caused by earthquakes, volcanic eruptions or submarine landslides) and capable of travelling over large distances and causing a destructive surge on reaching land.
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