Results 11 to 17 of about 17 (17)

On the GNSS-R Interferometric Complex Field Coherence Time [PDF]

arXiv, 2004
In this paper we focus on the microwave bistatic scattering process, with the aim of deriving an expression for the interferometric complex field auto-correlation function from a static platform. We start from the Fresnel integral and derive the auto-correlation function in the Fraunhofer and Modified Fraunhofer regime.
arxiv  

Bistatic scattering forward model validation using GNSS-R observations [PDF]

arXiv, 2019
In this paper we advance a previously developed bistatic scattering forward model to include the circularly polarized incident and scattered waves, which is the case for Global Navigation Satellite System (GNSS) reflectometry. This model development enables retrieval of soil moisture from Signals of Opportunity (SoOp) bistatic observations, e.g., from ...
arxiv  

Ionospheric (H-atom) Tomography: a Feasibility Study using GNSS Reflections [PDF]

arXiv, 2002
In this report we analyze the feasibility of ionospheric monitoring using GNSS technology. The focus will be on the use of LEO GNSS data, exploiting GNSS Reflections, Navigation and Occultation TEC measurements. In order to attack this question, we have simulated GNSS ionospheric TEC data as it would be measured from a polar LEO (exploiting Navigation,
arxiv  

PARIS Interferometric Processor Analysis and Experimental Results: Theoretical Feasibility Analysis [PDF]

arXiv, 2000
Several experimental results show that it is possible to extract useful phase information from reflected GPS signals over the oceans. In this work we begin the development of the theoretical background to account for these results and fully understand the phenomena involved.
arxiv  

PARIS Altimetry with L1 Frequency Data from the Bridge 2 Experiment [PDF]

arXiv, 2002
A portion of 20 minutes of the GPS signals collected during the Bridge 2 experimental campaign, performed by ESA, have been processed. An innovative algorithm called Parfait, developed by Starlab and implemented within Starlab's GNSS-R Software package STARLIGHT (STARLab Interferometric Gnss Toolkit), has been successfully used with this set of data. A
arxiv  

Calibration of the Polarimetric GNSS-R Sensor in the Rongowai Mission [PDF]

arXiv
Polarimetric GNSS-R systems, equipped with an additional polarization channel, offer enhanced capabilities for separating vegetation and surface scattering effects, thereby improving GNSS-R land remote sensing applications such as soil moisture retrieval in vegetated and forested areas and biomass estimation.
arxiv  

The Muon Space GNSS-R Surface Soil Moisture Product [PDF]

arXiv
Muon Space (Muon) is building a constellation of small satellites, many of which will carry global navigation satellite system-reflectometry (GNSS-R) receivers. In preparation for the launch of this constellation, we have developed a generalized deep learning retrieval pipeline, which now produces operational GNSS-R near-surface soil moisture ...
arxiv