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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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AMT | Articles | Volume 11, issue 2
Atmos. Meas. Tech., 11, 1181–1191, 2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Observing Atmosphere and Climate with Occultation Techniques...

Atmos. Meas. Tech., 11, 1181–1191, 2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 01 Mar 2018

Research article | 01 Mar 2018

Reflected ray retrieval from radio occultation data using radio holographic filtering of wave fields in ray space

Michael E. Gorbunov et al.
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Cited articles  
Aparicio, J. M., Cardellach, E., and Rodriguez, H.: Information content in reflected signals during GPS radio occultation observations, Atmos. Meas. Tech. Discuss.,, in review, 2017. a, b, c
Beyerle, G. and Hocke, K.: Observation and simulation of direct and reflected GPS signals in radio occultation experiments, Geophys. Res. Lett., 28, 1895–1898, 2001. a, b
Beyerle, G., Hocke, K., Wickert, J., Schmidt, T., Marquardt, C., and Reigber, C.: GPS radio occultations with CHAMP: a radio holographic analysis of GPS signal propagation in the troposphere and surface reflections, J. Geophys. Res., 107, 27–1–27–14,, 2002. a, b
Cardellach, E., Ao, C. O., de la Torre-Juárez, M., and Hajj, G. A.: Carrier phase delay altimetry with GPS-reflection/occultation interferometry from low Earth orbiters, Geophys. Res. Lett., 31, L10402,, 2004. a
Cardellach, E., Oliveras, S., and Rius, A.: GNSS signal interference classified by means of a supervised learning method applied in the time-frequency domain, in: IEEE Proceedings of 2009 2nd International Congress on Image and Signal Processing, ISBN 13: 978-1-4244-4130-3, Institute of Electrical and Electronic Engineers, Tijuan, China, 17–21 October 2009, 2009. a, b, c, d
Publications Copernicus
Short summary
We apply linear and non-linear representations of wave fields, based on Fourier integral operators and Wigner distribution function, to the retrieval of reflected rays from radio occultation observations. We introduce a reflection index that characterizes the relative intensity of the reflected ray. A comparison of indices evaluated for a large base of events including the visual identification of reflections indicated a good agreement with our definition of reflection index.
We apply linear and non-linear representations of wave fields, based on Fourier integral...