Untangling the GNSS-R Coherent and Incoherent Components: Experimental Evidences Over the Ocean
作者： R. Onrubia , C. Rudiger , D. Pascual , H. Park , A. Camps
DOI: 10.1109/IGARSS39084.2020.9324005
关键词:
摘要: Global Navigation Satellite Systems Reflected (GNSS-R) signals exhibit an incoherent and a coherent components [1], [2]. Current models assume that one or the other are dominant, calibration, geophysical parameter retrieval (eg. wind speed, soil moisture …) developed accordingly. Even presence itself of component GNSS reflected signal has been matter discussion in last years. In this work, method used [3] to separate leakage direct from is applied set collected over ocean by MIR [4], [5], airborne dual-band (L1/E1 L5/E5a), multi-constellation (GPS Galileo) GNSS-R instrument with two 19-elements array 4 beam-steered each. The results presented demonstrate feasibility proposed technique untangle signals. This allows processing these separately, which will increase calibration accuracy (as today both mixed together), high resolution applications since spatial determined size first Fresnel zone [6] (300–500 meters LEO satellite), not glistening (~25 km satellite).
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