Título:
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Retracking considerations in spaceborne GNSS-R altimetry
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Autor/a:
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Hyuk, Park; Camps Carmona, Adriano José; Valencia Domènech, Enric; Rodríguez Álvarez, Nereida; Bosch Lluís, Xavier; Ramos Pérez, Isaac; Carrero Luengo, Hugo
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
Abstract:
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The European Space Agency Passive Reflectometry
and Interferometry System In-orbit Demonstrator
(IoD) aims to perform mesoscale altimetric observations by
measuring the Global Navigation Satellite System (GNSS)
opportunity signals reflected over the sea surface. Altimetry
based on GNSS reflectometry (GNSS-R) is significantly
affected by satellite motion, since it requires relatively long
integration times to reduce noise. We present the impact of
the satellite motion on the GNSS-R observables and the
need to retrack the waveforms. By using a detailed GNSSR
space mission simulator, the change of delay difference
between the direct and the reflected signals during the
incoherent averaging of the waveform has been investigated.
Their effects on the waveform shape and the altimetric
performance are presented comparing the aligned
and non-aligned waveforms. Results show that the performance
of spaceborne GNSS-R altimeter is seriously
degraded without a proper alignment of the waveform
samples. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica -Global Positioning System -Remote sensing -GNSS reflectometry -Ocean altimetry -Retracking -Satellite remote sensing -Delay compensation -GNSS (Sistema de navegació) -Teledetecció |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Artículo |
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