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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 11, issue 2 | Copyright

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

Atmos. Meas. Tech., 11, 1181-1191, 2018
https://doi.org/10.5194/amt-11-1181-2018
© 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., https://doi.org/10.5194/amt-2017-241, in review, 2017.
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.
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, https://doi.org/10.1029/2001JD001402, 2002.
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, https://doi.org/10.1029/2004GL019775, 2004.
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.
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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...
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