نتایج جستجو برای: refractivity index
تعداد نتایج: 396554 فیلتر نتایج به سال:
The GPS/MET experiment was the first active atmospheric microwave occultation experiment using the existing GPS L1 and L2 frequencies to measure the atmospheric refractive index. One major limitation to this technique is that the presence of water vapor in amounts typically found in the lower troposphere (below 5-7 km) causes an ambiguity between the contributions of dry air and moisture to the...
It is proposed to obtain information on atmospheric refractivity structure by measuring the angle of arrival (AoA) radio signals routinely broadcast commercial aircraft. The would be measured at hill-top sites using a simple two-element interferometer. Knowledge aircraft’s location (information conveniently contained within broadcasts) and AoA will enable bending calculated. As measurable only ...
The long-term goals of the research are to understand and assess the effects of the atmosphere on the detection of targets at low altitudes over sea in coastal regions using IR and radar systems. Effects considered are transmission losses due to aerosols and water vapor, effects of turbulent fluctuations of the air temperature on blurring and scintillation, and effects of vertical temperature a...
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