The infrared atmospheric window is an atmospheric window in the infrared spectrum where there is relatively little absorption of terrestrial thermal radiation by atmospheric gases. [1] The window plays an important role in the atmospheric greenhouse effect by maintaining the balance between incoming solar radiation and outgoing IR to space.

2016年5月17日 · The atmospheric transmission in the infrared (IR) is an im-portant parameter in thermovision measurements. This is due to the fact that, when the temperature of an object is mea-sured, the atmosphere which is between the thermal imag-ing camera and the object attenuates infrared radiation emit-ted by the object.

"The Transmission of the Atmosphere in the Near Infrared." This report resulted from an interest in the atmospheric windows at 2.2A and 3.7A (our V and VI). The conclusion was that these windows were approximately equally clear, and that the 4.3u C02 band provided the long wavelength cut-off of the latter.

The Atmospheric Infrared Spectrum Atlas provides spectra for a wide range of molecules in Earth's atmosphere. This website includes zenith absorption/optical thickness and limb radiance spectra on fully interactive graphs which can be customised show specific molecules, spectral ranges and satellite bands.

The transmission of the atmosphere in the infrared review 167 absorption versus frequency was directly obtained. They were able to accumulate a large body of reliable, reproducible spectra for the HgO bands at 5332, 3700, and 1595 cm-1, the COa bands at 3716, 3609, 2350, 1064, 961, and 667 cm-1 and the principal bands of N,0, CH( and CO.

2023年4月10日 · Some of the incoming energy is absorbed by the atmosphere, whereas most of the infrared energy emitted by the Earth is absorbed. The places with limited or almost no absorption by the atmosphere is known as the atmospheric window - allowing us to peer into the atmosphere at various wavelengths.

Measurements are described of the transmission of 4.7 m of atmospheric air containing water with a partial vapour pressure of 1.47 cm Hg in the spectral region between 2.5 and 50 μm. The results are used to predict the transmission at other pressures and over other thicknesses.

This technology uses the transmission of an optical or infrared (IR) signal in the atmosphere to provide high data rate reliable more economically than traditional fiber. Some of FSO advantages are: spectrum licensing, frequency coordination, no interference, fast and easy installation, multi-Gbps high data rate, low cost.

Atmospheric windows, especially the optical and infrared, affect the distribution of energy flows and temperatures within Earth's energy balance. The windows are themselves dependent upon clouds, water vapor , trace greenhouse gases, and other components of the atmosphere.

Certain portions of the infrared spectral region can get through the atmosphere, at least partially. Observatories at high altitude (above most of the water vapor in the atmosphere) can do quite well in certain small wavelength ranges. And special infrared telescopes have been flown on high-flying aircraft to open this window even further.