Advanced architectures for real-time delay-doppler map GNSS-reflectometers: the GPS reflectometer instrument for PAU (griPAU)
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Document typeArticle
Date issued2010-07-15
Rights accessRestricted access - publisher's policy
Abstract
In recent years Global Navigation Satellite System’s signals Reflectometry (GNSS-R) has stood as a potential powerful remote sensing
technique to derive scientifically relevant geophysical parameters such as ocean altimetry, sea state or soil moisture. This has brought out the need of designing and implementing appropriate receivers in order to track and process this kind of signals in real-time to avoid the storage of huge volumes of raw data. This paper presents the architecture and performance of the Global Positioning System (GPS) Reflectometer Instrument for PAU (griPAU), a real-time high resolution Delay-Doppler Map reflectometer, operating at the GPS L1
frequency with the C/A codes. The griPAU instrument computes 24 x 32 complex points DDMs with configurable resolution
(DfDmin = 20 Hz, Dsmin = 0.05 chips) and selectable coherent (minimum = 1 ms, maximum = 100 ms for correlation loss Dq < 90%)and incoherent integration times (minimum of one coherent integration period and maximum not limited but typically <1 s). A high sensitivity (DDM peak relative error = 0.9% and DDM volume relative error = 0.03% @ Ti = 1 s) and stability (Dq/Dt = 1 s-1) have
been achieved by means of advanced digital design techniques.
CitationValencia, E. [et al.]. Advanced architectures for real-time delay-doppler map GNSS-reflectometers: the GPS reflectometer instrument for PAU (griPAU). "Advances in space research", 15 Juliol 2010, vol. 46, núm. 2, p. 196-207.
ISSN0273-1177
Publisher versionhttp://linkinghub.elsevier.com/retrieve/pii/S0273117710000876
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