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Title:
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Airborne wind retrieval using GPS delay-Doppler maps
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Author:
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Zavorotny, Valery; Rodríguez, Nereida; Akos, D.M.; Camps Carmona, Adriano José
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Other authors:
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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 |
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Abstract:
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Global Navigation Satellite System Reflectometry (GNSSR)
has emerged recently as a promising remote sensing tool
to retrieve various geophysical parameters of Earth’s
surface. GNSS-reflected signals, after being received and
processed by the airborne or space-borne receiver, are
available as delay correlation waveforms or as delay-
Doppler maps. In the case of a rough ocean surface, those
characteristics can be related to the RMS of L-band limited
slopes of the surface waves, and from there to the surface
wind speed. The raw GNSS-reflected signal can be
processed either in real time by the receiver, or can be
recorded and stored onboard and post-processed in a
laboratory. The latter approach leveraging a software
receiver allows more flexibility while processing the raw
data. This work analyzes Delay Doppler Maps (DDM)
obtained as a result of processing of the data collected by the
GPS data logger/software receiver onboard the NOAA
Gulfstream-IV jet aircraft. Thereafter, the DDMs were used
to retrieve surface wind speed employing several different
metrics that characterize the DDM extent in the Doppler
frequency-delay domain. In contrast to previous works in
which winds have been retrieved by fitting the theoretically
modeled curves into measured correlation waveforms, here
we do not rely on any model for the determination. Instead,
the approach is based on a linear regression between DDMs
observables and the wind speeds obtained in simultaneous
GPS dropsonde measurements. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
-Remote sensing
-Global Positioning System
-Bistatic radar
-delay-Doppler mapping
-global navigation satellite systems (GNSS)
-global positioning system (GPS)
-ocean surface
-oceanography
-reflected GPS
-scatterometry
-Teledetecció
-Radiació -- Mesurament |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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