Horizontal maps of echo power in the lower stratosphere using the MU radar
In recent works, zenithal and azimuthal angle variations of echo power measured by VHF Stratosphere-Troposphere (ST) radars have been analyzed in detail using different radar multi-beam configurations. It was found that the azimuthal angle corresponding to maximum echo power is closely related t...
| Principais autores: | , , , |
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| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
Copernicus Publications
2004-03-01
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| coleção: | Annales Geophysicae |
| Acesso em linha: | https://www.ann-geophys.net/22/717/2004/angeo-22-717-2004.pdf |
| Resumo: | In recent works, zenithal and azimuthal angle variations of echo power
measured by VHF Stratosphere-Troposphere (ST) radars have been analyzed
in detail using different radar multi-beam configurations. It was found
that the azimuthal angle corresponding to maximum echo power is closely
related to the direction of the horizontal wind shear. These properties
indicate that local wind shear affects the tilt of the
scatterers. Moreover, horizontal maps of echo power collected using a
large set of beams steered pulse-to-pulse up to 40 degrees off zenith
revealed that the power distribution pattern in the troposphere is often
skewed. In this work, a three-dimensional description of echo power
variations up to 24 degrees off zenith is shown for measurements in the
lower stratosphere (i.e. up to approximately 20km) using a "sequential
multi-beam" (SMB) configuration. Such a description was not possible
above the tropopause with classical multi-beam configurations because of
the loss of radar sensitivity due to the limited integration time by the
use of a large number of beams. This work attempts to complete previous
descriptions of the phenomenon by some observations in the lower
stratosphere discussed in association with complementary balloon
measurements.<br><br>
<b>Key words.</b> Meteorology and atmospheric dynamics (turbulence)
– Radio Science (remote sensing) |
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| ISSN: | 0992-7689 1432-0576 |