Títol:
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Potential synergetic use of GNSS-R signals to improve the sea-state correction in the sea surface salinity estimation: Application to the SMOS mission
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Autor/a:
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Sabia, Roberto; Caparrini, M.; Camps Carmona, Adriano José; Ruffini, G.
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Altres autors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
Abstract:
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It is accepted that the best way to monitor sea surface
salinity (SSS) on a global basis is by means of L-band radiometry.
However, the measured sea surface brightness temperature
(TB) depends not only on the SSS but also on the sea surface
temperature (SST) and, more importantly, on the sea state, which
is usually parameterized in terms of the 10-m-height wind speed
(U10) or the significant wave height. It has been recently proposed
that the mean-square slope (mss) derived from global navigation
satellite system (GNSS) signals reflected by the sea surface could
be a potentially appropriate sea-state descriptor and could be used
to make the necessary sea state TB corrections to improve the
SSS estimates. This paper presents a preliminary error analysis of
the use of reflected GNSS signals for the sea roughness correction
and was performed to support the European Space Agency’s
Soil Moisture and Ocean Salinity (SMOS) mission; the orbit and
parameters for the SMOS instrument were assumed. The accuracy
requirement for the retrieved SSS is 0.1 practical salinity units
after monthly averaging over 2◦ × 2◦ boxes. In this paper, potential
improvements in salinity estimation are hampered mainly
by the coarse sampling and by the requirements of the retrieval
algorithm, particularly the need for a semiempirical model that
relates TB and mss. |
Matèries:
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Auxiliary data -Global navigation satellite -Microwave radiometry -Signal theory (Telecommunication) -Microones -Senyal, Teoria del (Telecomunicació) |
Drets:
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Tipus de document:
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Article - Versió publicada Conferència/Classe |
Publicat per:
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IEEE Press. Institute of Electrical and Electronics Engineers
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