atmospheric absorption

atmospheric absorption

[¦at·mə¦sfir·ik əb′zȯrp·shən]
(geophysics)
The reduction in energy of microwaves by gases and moisture in the atmosphere.
References in periodicals archive ?
The spectral response width is 100 times larger than the individual atmospheric absorption lines, so the observed broadband radiation is the average of many absorption lines with various strengths.
Compared to atmospheric absorption and transmission during the transmission, the contribution of scattering is so small that it can be ignored.
This frequency has several advantages for automotive use: the wide bandwidth available improves accuracy and object resolution; with a wavelength of 3.9 mm, the antenna can be small; and atmospheric absorption limits interference with other systems.
Many Astronomical observations and experiments are severely limited by the Earths atmosphere: atmospheric turbulence, atmospheric absorption, scattering and emissions, bad weather and other phenomena degrade or prevent many astronomical observations.
The atmospheric absorption coefficient values are calculated using the radiation transmission model, and compared with the experimental data in the frequency region.
Haze or fog is a common natural phenomenon formed by the increased size of fine suspended particles in the atmospheric media which affect atmospheric absorption, emission and scattering of light.
This is due to the increased free space propagation loss and the atmospheric absorption. However, while the E-band and the W-band exhibit a reasonable atmospheric absorption, the V-band suffers significant attenuation due to the oxygen absorption [1].
As the satellite orbits at 650 kilometres above Earth, the FTS is poised to take sequences of atmospheric absorption spectra twice a day, during sunrise and sunset.
From 1 km to 4 km, the atmospheric structure constant does not depend on sub aerial atmospheric structure constant and wind velocity due to atmospheric absorption. The ITU-R atmospheric structure constant mode is closer to the actual turbulence model than negative exponent index model.
This would allow high data rate communications and reduce atmospheric absorption. The incorporation of the CMOS multiple antennas on chip is enabled to further realize wireless network region better than 60GHz for wireless communications “WC”, military battlefield applications “MBA”, vehicular communication applications “VCA”, electronic devices applications “EDA', high speed data transmission applications 'HSDTA”, and homeland security intelligence applications “HISA.” The chip would allow faster graphical data transmission to expedite SSN information sharing.
The millimeter-wave W-band, however, experiences significant signal attenuation due to factors such as atmospheric absorption and rain, and there has been demand for high-output power amplifiers that can transmit a stable signal across distances ranging from a few kilometers to several tens of kilometers.
Atmospheric absorption of one of these gamma rays creates a short-lived shower of subatomic particles.

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