The preferred term for the middle wavelength ranges of the infrared region extending roughly from 3 µm at the end of the near infrared, to about 15 or 20 m where the far infrared commences. In practice the limits represent the the envelope of energy emitted by the Earth behaving as a graybody with a surface temperature around 290 K. Seen from space, the radiance envelope has several brighter bands corresponding to windows in the atmospheric absorption bands. The thermal band most used in remote sensing extends from 8 to 15 µm.
The middle and far infrared portions of the spectrum; mainly used to distinguish infrared radiation of terrestrial origin from the solar infrared.
Electromagnetic radiation with wavelengths between 3 and 25 micrometers. [NOAA
electromagnetic radiation ranging from ~3 - 50 microns in wavelength
Infrared radiation at approximately 3-12 microns. Thermal radiation is produced by the Earth as it radiates heat energy into space. Compare with reflected infrared.
Electromagnetic radiation at wavelengths longer than near infrared, within the waveband 3µm to c. 18pm.
Infrared radiation with wavelengths ranging from 3 to 1000 micrometers.
Phrase used to describe the middle wavelength ranges in the infrared portion of the electromagnetic spectrum. Ranging between 3 microns and 20 microns, most remote sensing applications utilize the 8- to 13-micron range. This is emitted energy whereas other infrared (near infrared) is reflected energy.
The preferred term for the mid-range wavelengths of the infrared region, extending roughly from 3 µm at the end of the near infrared, to about 15 or 20 µm, where the far infrared begins. In practice the limits represent the envelope of energy emitted by the Earth behaving as a grey body with a surface temperature around 300K (approximately 27°C).