Effects of Melting Layer in Airborne Meteorological X-Band Radar Observations.
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| Title: | Effects of Melting Layer in Airborne Meteorological X-Band Radar Observations. |
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| Authors: | Pujol, O.1, Mesnard, F.2, Sauvageot, H.2 |
| Source: | IEEE Transactions on Geoscience & Remote Sensing. Jun2012, Vol. 50 Issue 6, p2318-2324. 7p. |
| Subjects: | Melting, Hydrometeorology, Snowflakes, Radar antennas, Airplane radar equipment |
| Abstract: | Most civil aviation aircraft are equipped with meteorological radar working at the X-band (f ≈ 10 GHz; λ ≈ 3.2 cm) . These radars use a small antenna and, thus, a large beamwidth, around 3°-4°, for observations over long distances (up to 350 km). In the presence of microphysical inhomogeneities inside a radar sampling volume, as filling by different hydrometeor categories, radar reflectivity measurements are biased. An important bias occurs when a radar cell is cut by a nonresolved layer of melting snowflakes whose attenuation is high compared to those of rain and dry snow. This paper illustrates the effects in precipitation-attenuation correction schemes (PACS) of the inhomogeneity associated with the 0 °C isotherm. It proposes a method to take into account these effects in PACS. Adaptation of the method to other frequency bands and ground-based radar observations is easy. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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