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J.R. Apel.
An improved model of the ocean surface wave vector spectrum and its effects on radar backscatter.
J. Geophys. Res., 99((C8)):16269-16291, 1994.

P. Axelrad, C.J. Comp, and Macdoran P.F.
SNR-based multipath error correction for GPS differential phase.
IEEE Trans. Aerospace and Electronic Systems, 32(2):650-660, April 1996.

M. Belmonte.
Bistatic Scattering of Global Positioning System Signals from Arctic Sea Ice.
PhD thesis, University of Colorado, 2007.

S. Blanch and A. Aguasca.
Seawater dielectric permittivity model from measurements at l band.
In Proc. IEEE IGARSS, volume 2, pages 1362-1365, Anchorage, Alaska, September 2004.

E. Cardellach, C.O. Ao, M. de la Torre-Juárez, and G.A. Hajj.
Carrier phase delay altimetry with GPS-reflection/occultation interferometry from Low Earth Orbiters.
Geophys. Res. Lett., 31(10, L10402), May 2004.

E. Cardellach, F. Fabra, O. Nogués-Correig, S. Oliveras, S. Ribó, and A. Rius.
From Greenland to Antarctica: CSIC/IEEC results on sea-ice, dry-snow, soil-moisture and ocean GNSS reflections.
In E. C. Bureau, editor, Proceedings of 2nd International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme, Padua, Italy, 2009. European Space Agency.

E. Cardellach, F. Fabra, O. Nogués-Correig, S. Oliveras, S. Ribó, and A. Rius.
GNSS-R ground-based and airborne campaigns for Ocean, Land, Ice and Snow techniques: application to the GOLD-RTR datasets.
Radio Science, 46, RS0C04, 2011, oct, doi: 10.1029/2011RS004683

E. Cardellach, , F. Fabra, , A. Rius, S. Pettinato, S. D'Addio.
Characterization of Dry-snow Sub-structure using GNSS Reflected Signals.
Remote Sensing Environment, 2012, accepted May, 10.1016/j.rse.2012.05.012

E. Cardellach, S. Ribó, and A. Rius.
Technical Note on POlarimetric Phase Interferometry (POPI).
Arxiv preprint physics/0606099, 2006.

E. Cardellach and A. Rius.
A New Technique to Sense Non-Gaussian Features of the Sea Surface from L-band Bi-static GNSS Reflections.
Remote Sensing of Environment, 112:2927-2937, June 2008.

E. Cardellach and A. Rius., M. Martín-Neira, F. Fabra, O. Nogués-Correig, S. Ribó, J. Kainulainen, A. Camps, and S. D'Addio.
Consolidating the Precision of Interferometric GNSS-R Ocean Altimetry using Airborne Experimental Data.
IEEE Transactions on Geoscience and Remote Sensing, 2013, doi:10.1109/TGRS.2013.2286257

E. Cardellach, G. Ruffini, D. Pino, A. Rius, A. Komjathy, and J. L. Garrison.
Mediterranean Balloon Experiment: ocean wind speed sensing from the stratosphere using GPS reflections.
Remote Sens. Environm., 88(3):351-362, December 2003.

F. Carsey.
Microwave Remote Sensing of Sea Ice, volume 68.
AGU Geophysical Monograph Series, ISBN 0-87590-033-X, 1992.

C. Cox and W. Munk.
Measurement of roughness of the sea surface from photographs of the sun's glitter.
J. Opt. Soc. Amer., 44:838-850, November 1954.

S. Delwart, C. Bouzinac, P. Wursteisen, M. Berger, M. Drinkwater, M. Martín-Neira, and Y.H. Kerr.
SMOS validation and the CoSMOS campaigns.
IEEE Trans. Geosc. Remote Sensing, 46:695-704, March 2008.

T. Elfouhaily, B. Chapron, K. Katsaros, and D. Vandemark.
A unified directional spectrum for long and short wind-driven waves.
J. Geophys. Res., 102(C7):15781-15796, July 1997.

P. Elosegui, J.L. Davis, R.T.K. Jaldehag, J.M. Johansson, A. E. Niell, and I.I. Shapiro.
Geodesy using the Global Navigation System: the effects of signal scattering on estimates of site position.
J. Geophys. Res., 100:9921-9934, 1995.

F. Fabra, E. Cardellach, A. Rius, S. Ribó, S. Oliveras, O. Nogués-Correig, M. Belmonte Rivas, M. Semmling, S. D' Addio.
Phase Altimetry with Dual Polarization GNSS-R over Sea Ice
IEEE Transactions on Geoscience and Remote Sensing, 50, 6, pp. 10, 2011, nov, doi:10.1109/TGRS.2011.2172797

Garrison, J., Cardellach, E., Gleason, S., Katzberg, S.
Foreword to Special Issue on Reflectometry using Global Navigation Satellite Systems and Other Signals of Opportunity (GNSS+R).
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 7, 5, pp. 1412-1415, 2014, may, doi:10.1109/JSTARS.2014.2325996

J. L. Garrison, A. Komjathy, V. U. Zavorotny, and S. J. Katzberg.
Wind Speed Measurement Using Forward Scattered GPS Signals.
IEEE Trans. Geosc. Remote Sensing, 40(1):50-65, January 2002.

O. Germain, G. Ruffini, F. Soulat, M. Caparrini, B. Chapron, and P. Silvestrin.
The Eddy Experiment: GPS speculometry for directional sea-roughness retrieval from low-altitude aircraft.
Geophys. Res. Lett., 31(L21307), November 2004.

S. Gleason.
Remote Sensing of Ocean, Ice and Land Surfaces Using Bistatically Scattered GNSS Signals From Low Earth Orbit.
PhD thesis, University of Surrey, 2006.

S. Gleason, S. Lowe, and V. Zavorotny.
GNSS Applications and Methods, chapter 16, pages 399-436.
Artech House, Boston, London, 2009.

G.A. Hajj and C. Zuffada.
Theoretical description of a bistatic system for ocean altimetry using the GPS signal.
Radio Science, 38(5):1089, 2003.

A. Helm, G. Beyerle, and M Nitschke.
Detection of coherent reflections with gps bipath interferometry, 2004.

IERS Bulletin C.
IERS Central Bureau, Frankfurt am Main, Germany.

IERS Technical Note No. 32.
IERS Central Bureau, Frankfurt am Main, Germany, 2003.

Jin. S., Cardellach, E., Xie, F.
GNSS Remote Sensing: Theory, Methods and Applications.
Springer Verlag, 19, Remote Sensing and Digital Image Processing, 2014, New York, London, doi:10.1007/978-94-007-7482-7

R.M. Jones and J.J. Stephenson.
A versatile three-dimensional ray tracing computer program for radio waves in the ionosphere, 1975.
OT Report 75-76. Copies available from NGDC, Boulder, CO.

S.J. Katzberg, O. Torres, M.S. Grant, and D. Masters.
Utilizing calibrated GPS reflected signals to estimate soil reflectivity and dielectric constant: Results from SMEX02.
Remote Sens. Environm., 100:17-28, 2005.

A. Komjathy, M. Armatys, D. Masters, and P. Axelrad.
Retrieval of ocean surface wind speed and wind direction using reflected GPS signals.
Journal of Atmospheric and Oceanic Technology, 21:515-526, March 2004.

A. Komjathy, J. Maslanik, V. U. Zavorotny, P. Axelrad, and S. J. Katzberg.
Sea Ice Remote Sensing Using Surface Reflected GPS Signals.
In Proc. IEEE IGARSS, pages 2855-2857, Honolulu, HI, USA, July 24-28, 2000.

G. Lagerloef, F.R. Colomb, D. Le Vine, F. Wentz, S. Yueh, C. Ruf, J. Lilly, J. Gunn, Y. Chao, A. deCharon, G. Feldman, and C. Swift.
The Aquarius/SAC-D Mission: Designed to Meet the Salinity Remote-Sensing Challenge.
OCEANOGRAPHY, 21 (1i):68-81, March 2008.

R.H. Lang, Y. Tarkocin, C. Utku, and D. Le Vine.
Accurate l-band dielectric constant measurements of seawater.
In Proc. IEEE MICRORAD, pages 1-4, Florence, Italy, March 2008.

S. Lie-Chung, J. Jyh-Ching, T. Ching-Lang, C. Chia-Chyang, K. Ping-Ya, and T. Ching-Liang.
Stream soil moisture estimation by reflected GPS signals with ground truth measurements.
IEEE Transactions on Instrumentation and Measurements, 58(3):730 - 737, March 2009.

S. T. Lowe, C. Zuffada, Y. Chao, P. Kroger, L. E. Young, and J. L. LaBrecque.
5-cm Precision Aircraft Ocean Altimetry Using GPS Reflections.
Geophys. Res. Lett., 29(10, 1375), May 2002.

D. Manandhar, R. Shibasaki, and H. Torimoto.
Prototype software-based receiver for remote sensing using reflected GPS signals.
In Proc. ION GNSS 19th International Technical Meeting of the Satellite Division, pages 643-652, Fort Worth, TX, September 2006.

J.F. Marchan-Hernandez, N. Rodriguez-Alvarez, A. Camps, X. Bosch-Lluis, I. Ramos-Perez, and E. Valencia.
Correction of the sea state impact in the l-band brightness temperature by means of delay-doppler maps of global navigation satellite signals reflected over the sea surface.
IEEE Trans. Geosc. Remote Sensing, 46(10):2914-2923, October 2008.

M. Martín-Neira.
A Passive Reflectometry and Interferometry System (PARIS): Application to Ocean Altimetry.
ESA J., 17:331-355, December 1993.

M. Martín-Neira, M. Caparrini, J. Font-Rosselló, S. Lannelongue, and C. Serra Vallmitjana.
The PARIS Concept: An Experimental Demonstration of Sea Surface Altimetry Using GPS Reflected Signals.
IEEE Trans. Geosc. Remote Sensing, 39(1):142-149, January 2001.

M. Martín-Neira, S. D'Addio, C. Buck, N. Floury, R. Prieto-Cerdeira.
The PARIS ocean altimeter in-orbit demonstrator.
IEEE Trans. Geosc. Remote Sensing, Vol. 49, No.6, pp:2209-2237, 2011.

D. Masters, P. Axelrad, and S. Katzberg.
Initial results of land-reflected GPS bistatic radar measurements in SMEX02.
Remote Sens. Environm., 92:507-520, 2004.

K.D. McMullan, M.A. Brown, M. Martín-Neira, W. Rits, J. Marti, and J. Lemansczyk.
SMOS: The Payload.
IEEE Trans. Geosc. Remote Sensing, 46:594-605, March 2008.

J.J. Miranda, M. Vall-llosera, A. Camps, N. Duffo, I. Corbella, and J. Etcheto.
Sea state effect on the sea surface emissivity at L-band.
IEEE Trans. Geosc. Remote Sensing, 41:2307-2315, October 2003.

Pratap Misra and Per Enge.
Global Positioning System: Signals, Measurements, and Performance.
Ganga-Jamuna Press, Lincoln, Massachussets 01773, 2006.
ISBN: 0-9709544-1-7.

A. Niell.
Global mapping functions for the atmospheric delay at radio wavelengths.
J. Geophys. Research, pages 3227-3246, February 1996.

O. Nogués-Correig, E. Cardellach Galí, J. Sanz Campderròs, and A. Rius.
A GPS-Reflections Receiver That Computes Doppler/Delay Maps in Real Time.
IEEE Trans. Geosc. Remote Sensing, 45(1):156-174, January 2007.

UNIDATA Program.

S. Ribó, J. C. Arco, S. Oliveras, E. Cardellach, A. Rius, C. Buck.
Experimental Results of an X-Band PARIS Receiver Using Digital Satellite TV Opportunity Signals Scattered on the Sea Surface.
Geoscience and Remote Sensing, IEEE Transactions on, vol.52, no.9, pp.5704,5711, September 2014.

S.O. Rice.
Reflection of electromagnetic waves from slightly rough surfaces.
Communications on Pure and Applied Mathematics, 4(2-3):351r-378, 1951.

A. Rius, J. M. Aparicio, E. Cardellach, M. Martín-Neira, and B. Chapron.
Sea surface state measured using GPS reflected signals.
Geophys. Res. Lett., 29(23, 2122), December 2002.

A. Rius, E. Cardellach, and M. Martín-Neira.
Altimetric analysis of the sea surface gps reflected signals.
IEEE Trans. Geosc. Remote Sensing, 48(4):2119-2127, April 2010.

G. Ruffini, F. Soulat, M. Caparrini, O. Germain, and M. Martín-Neira.
The Eddy Experiment: Accurate GNSS-R ocean altimetry from low altitude aircraft.
Geophys. Res. Lett., 31(12, L12306), Jun 2004.

F. Soulat, M. Caparrini, O. Germain, P. Lopez-Dekker, M. Taani, and G. Ruffini.
Sea state monitoring using coastal GNSS-R.
Geophys. Res. Lett, 31, 2004.

J. J. Spilker, B. W. Parkinson, P. Axelrad, and P. Enge, editors.
Global Positioning System: Theory and Applications.
Amer. Inst. Aeronaut. Astronaut., Washington, DC, 1996.

B. Townsend and R. Fenton.
A practical approach to the reduction of pseudo-range multipath errors in an L1 GPS receiver.
In Proceedings of 7th Int. Tech. Meeting of the Satellite Division of the U.S. Institute of Navigation ION, pages 143-148, Salt Lake City, Utah, 1994. ION.

R. N. Treuhaft, S. T. Lowe, C. Zuffada, and Y. Chao.
Two-cm GPS altimetry over Crater Lake.
Geophys. Res. Lett., 28(23):4343-4346, 2001.

F.T. Ulaby, R.K. Moore, and A.K. Fung.
Microwave Remote Sensing Active and Passive, volume III.
Artech House, Inc., 1990.

M. Vall-llossera, M. Cardona, S. Blanch, A. Camps, A. Monerris, and I. Corbella.
L-band dielectric properties of different soil types collected during the MOUSE 2004 field experiment.
In Proc. IEEE IGARSS, volume 2, pages 1109-1112, 2005.

A. G. Voronovich.
Small-slope approximation for electromagnetic wave scattering at a rough interface of two dielectric hald-spaces.
Waves in Random Media, 4:337-367, 1994.

C.A. Wagner and J. Klokocnik.
The value of ocean reflections of GPS signals to enhance satellite altimetry: data distribution and error analysis.
J. Geodesy, 77:128-138, 2003.

P. Wessel and W. H. F. Smith.
Free software helps map and display data.
EOS Trans. AGU, 72:441, 1991.

M. Wiehl, R. Légrésy, and R. Dietrich.
Potential of reflected GNSS signals for ice sheet remote sensing.
Progress in electromagnetics research, 40:177-205, 2003.

D.P. Winebrenner, L. Tsang, B. Wen, and R. West.
Sea-ice characterization measurements needed for testing of microwave remote sensing models.
IEEE Journal of Oceanic Engineering, 14(2):149-158, 1989.

J.T. Wu, S.C. Wu, G.A. Hajj, W.I. Bertiger, and S.M. Lichten.
Effects of antenna orientation on GPS carrier phase.
Manuscripta Geodaetica, 18(2):91-98, 1993.

V. Zavorotny and C. Zuffada.
A novel technique for characterizing the thickness of first-year sea-ice with the GPS reflected signal.
In AGU Fall Meeting, San Francisco, CA, USA, 2002.

V. U. Zavorotny, D. Masters, A. Gasiewski, B. Bartram, S. Katzberg, P. Axelrad, and R. Zamora.
Seasonal polarimetric measurements of soil moisture using tower-based GPS bistatic radar.
In Proc. IEEE IGARSS, volume 2, pages 781 - 783, July 2003.

V. U. Zavorotny, S. Gleason, Cardellach, E., A. Camps.
Tutorial on Remote Sensing Using GNSS Bistatic Radar of Opportunity
In IEEE Geoscience and Remote Sensing Magazine, invited tutorial, December 2014, doi:10.1109/MGRS.2014.2374220

V. U. Zavorotny and A. G. Voronovich.
Bistatic GPS signal reflections at various polarizations from rough land surface with moisture content.
In Proc. IEEE IGARSS, volume 7, pages 2852-2854, Piscataway, NJ, 2000.

V. U. Zavorotny and A. G. Voronovich.
Scattering of GPS Signals from the Ocean with Wind Remote Sensing Application.
IEEE Trans. Geosc. Remote Sensing, 38(2):951-964, March 2000.


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