Ocean/Atmosphere ApplicationsLand and Inland Waterways ApplicationsMission DevelopmentMission PrecursorsRelated Publications

Ocean/Atmosphere Applications

  1. Pu, Z., Y. Wang, X. Li, C. Ruf, L. Bi, A. Mehra, “Impacts of Assimilating CYGNSS Satellite Ocean Surface Wind on Prediction of Landfalling Hurricanes with the HWRF Model,” Remote Sensing, 14, 2118, doi: 10.3390/rs14092118, 2022. [paper]
  2. Evans, M. C., C. S. Ruf, “Towards the Detection and Imaging of Ocean Microplastics with a Spaceborne Radar,” IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2021.3081691, 2021. [paper]
  3. Pascual, D., M. P. Clarizia, C. S. Ruf, “Spaceborne Demonstration of GNSS-R Scattering Cross-Section Sensitivity to Wind Direction,” Geosci. Remote. Sens. Ltrs., doi: 10.1109/LGRS.2021.3049526, 2021. [paper]
  4. Cardellach, E., Y. Nan, W. Li, R. Padullés S. Ribó, A. Rius, “Variational Retrievals of HighWinds Using Uncalibrated CyGNSS Observables,” Remote Sensing, doi: 10.3390/rs12233930, 2020. [paper]
  5. Li, W., E. Cardellach, F. Fabra, S. Ribó, A. Rius, “Assessment of Spaceborne GNSS-R Ocean Altimetry Performance Using CYGNSS Mission Raw Data,” Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2019.2936108, 2019. [paper]
  6. Crespo, J.A., D.J. Posselt, S. Asharaf, “CYGNSS Surface Heat Flux Product Development,” Remote Sens.,  doi:10.3390/rs11192294, 2019. [paper]
  7. Ruf, C. S., S. Asharaf, R. Balasubramaniam, S. Gleason, T. Lang, D. McKague, D. Twigg, D. Waliser, “In-Orbit Performance of the Constellation of CYGNSS Hurricane Satellites,” Bull. Amer. Meteor. Soc., doi:10.1175/BAMS-D-18-0337.1, 2019. [paper]
  8. Mayers, D., and C. S. Ruf, “Tropical Cyclone Center Fix using CYGNSS Winds,” J. Appl. Meteor. Climatol., doi: 10.1175/JAMC-D-19-0054.1, 2019. [paper]
  9. Cui, Z., Z. Pu, V. Tallapragada, R. Atlas, C. S. Ruf, “Impact of CYGNSS Ocean Surface Wind Speeds on Numerical Simulations of Hurricanes Harvey and Irma (2017),” Geophys. Res. Ltrs., doi: 10.1029/2019GL082236, 2019. [paper]
  10. Park, J., J. T. Johnson, Y. Yi, A. J. O’Brien, “Using “Rapid Revisit” CYGNSS Wind Speed Measurements to Detect Convective Activity” J. Sel. Top. Appl. Earth Obs. Remote Sens., doi: 10.1109/JSTARS.2018.2848267, 2018. [paper]
  11. Ruf, C.S., C. Chew, T. Lang, M.G. Morris, K. Nave, A. Ridley, R. Balasubramaniam, “A New Paradigm in Earth Environmental Monitoring with the CYGNSS Small Satellite Constellation,” Scientific Reports, doi: 10.1038/s41598-018-27127-4, 2018 [paper]
  12. Leidner, S., B. Annane, B. McNoldy, R. Hoffman, and R. Atlas, “Variational Analysis of Simulated Ocean Surface Winds from the Cyclone Global Navigation Satellite System (CYGNSS) and Evaluation using a Regional OSSE,” J. Atmos. Oceanic Technol. doi:10.1175/JTECH-D-17-0136.1, in press, 2018. [paper]
  13. Annane, B., B. McNoldy, S. Leidner, R. Hoffman, R. Atlas, and S. Majumdar, “A Study of the HWRF Analysis and Forecast Impact of Realistically Simulated CYGNSS Observations Assimilated as Scalar Wind Speeds and as VAM Wind Vectors,” Mon. Wea. Rev. doi:10.1175/MWR-D-17-0240.1, 2018. [paper]
  14. Hoover, K.C., T. J. Lang, X. Li, T. J. Castillo, T. Chronis, “Use of an End-to-End-Simulator to Analyze CYGNSS,” J. Atmos. Oceanic Technol., doi: 10.1175/JTECH-D-17-0036.1, 2018. [paper]
  15. Zhang, S., Z. Pu, D. J. Posselt, R. Atlas, “Impact of CYGNSS Ocean Surface Wind Speeds on Numerical Simulations of a Hurricane in Observing System Simulation Experiments,” J. Atmos. Ocean. Technol., doi: 10.1175/JTECH-D-16-0144.1, 2017. [paper]
  16. Morris, M., and C. S. Ruf, “Determining Tropical Cyclone Surface Wind Speed Structure and Intensity with the CYGNSS Satellite Constellation,” J. Appl. Meteor. Climatol., 56(7), 1847–1865, doi: 10.1175/JAMC-D-16-0375.1, 2017. [paper]
  17. Morris, M., and C. S. Ruf, “Estimating Tropical Cyclone Integrated Kinetic Energy with the CYGNSS Satellite Constellation,” J. Appl. Meteor. Climatol., 56, 235–245, doi: 10.1175/JAMC-D-16-0176.1, 2017. [paper]
  18. Ruf, C. S., R. Atlas, P. S. Chang, M. P. Clarizia, J. L. Garrison, S. Gleason, S. J. Katzberg, Z. Jelenak, J. T. Johnson, S. J. Majumdar, A. O’Brien, D. J. Posselt, A. J. Ridley, R. J. Rose, V. U. Zavorotny, “New Ocean Winds Satellite Mission to Probe Hurricanes and Tropical Convection,” Bull. Amer. Meteor. Soc., doi:10.1175/BAMS-D-14-00218.1, pp385-395, Mar 2016. [paper]

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Land and Inland Waterways Applications

  1. Carreno Luengo, H., C. S. Ruf, “Mapping Freezing and Thawing Surface State Periods with the CYGNSS Based F/T Seasonal Threshold Algorithm,” IEEE J. Selected Topics Appl. Earth Obs. Remote Sens., doi: 10.1109/JSTARS.2022.3216463, 2022. [paper]
  2. Campbell, J., R. Akbar, A. Bringer, D. Comite, L. Dente, S. Gleason, L. Guerriero, E. Hodges, J. Johnson, S. Kim, A. Melebari, N. Pierdicca, C. S. Ruf, L. Tsang, T. Wang, H. Xu, J. Zhu, M. Moghaddam, “Intercomparison of Electromagnetic Scattering Models for Delay-Doppler Maps along a CYGNSS Land Track with Topography,” IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2022.3210160, 2022. [paper]
  3. Russo, I.M., M. di Bisceglie, C. Galdi, M. Lavalle, C. Zuffada, “Entropy-Based Coherence Metric for Land Applications of GNSS-R,” Trans. Geosci. Remote Sens., DOI: 10.1109/TGRS.2021.3125858, 2021. [paper]
  4. Gerlein-Safdi, C., A. A. Bloom, G. Plant, E. Kort, C. S. Ruf, “Improving representation of tropical wetland methane emissions with CYGNSS inundation maps,” Global Biogeochemical Cycles, doi: 10.1029/2020GB006890, 2021. [paper]
  5. Carreno Luengo, H., C. S. Ruf, “Retrieving Freeze/Thaw Surface State from CYGNSS Measurements,” IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2021.3120932, 2021. [paper]
  6. Chew, C. E. Small, “Description of the UCAR/CU Soil Moisture Product,” Remote Sensing, doi: 10.3390/rs12101558, 2020. [paper]
  7. Loria, E., A. O’Brien, V. Zavorotny, B. Downs, C. Zuffada, “Analysis of Scattering Characteristics from Inland Bodies of Water Observed by CYGNSS,” Remote Sens. Environ., doi: 10.1016/j.rse.2020.111825, 2020. [paper]
  8. Rajabi, M., H. Nahavandchi, M. Hoseini, “Evaluation of CYGNSS Observations for Flood Detection and Mapping during Sistan and Baluchestan Torrential Rain in 2020,” Water, 2020. [paper]
  9. Wan, W., B. Liu, Z. Zeng, X. Chen, G. Wu, L. Xu, X. Chen, Y. Hong, “Using CYGNSS Data to Monitor China’s Flood Inundation during Typhoon and Extreme Precipitation Events in 2017,” Remote Sens. Ltrs., 2019. [paper]
  10. Warnock, A., C. Ruf, “Response to Variations in River Flowrate by a Spaceborne GNSS-R River Width Estimator” Remote Sens., 11(20), 2450, doi: 10.3390/rs11202450, 2019. [paper]
  11. Morris, M, C. Chew, J. T. Reager, R. Shaw, C. Zuffada, “A novel approach to monitoring wetland dynamics using CYGNSS: Everglades case study,” Remote Sens. Environ., doi: 10.1016/j.rse.2019.111417, 2019. [paper]
  12. Balakhder, A.M., M.M. Al-Khaldi, J.T. Johnson, “On the Coherency of Ocean and Land Surface Specular Scattering for GNSS-R and Signals of Opportunity Systems”, IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2019.2935257, 2019. [paper]
  13. Jensen, K., K. McDonald, E. Podest, N. Rodriguez-Alvarez, V. Horna, N. Steiner, “Assessing L-Band GNSS-Reflectometry and Imaging Radar for Detecting Sub-Canopy Inundation Dynamics in a Tropical Wetlands Complex,” Remote Sensing, DOI:10.3390/rs10091431, 2018. [paper]
  14. Kim, H., V. Lakshmi, “Use of Cyclone Global Navigation Satellite System (CyGNSS) Observations for Estimation of Soil Moisture,” Geophys. Res. Ltr., doi: 10.1029/2018GL078923, 2018. [paper]
  15. Carreno-Luengo, H., G. Luzi, M. Crosetto, “Sensitivity of CyGNSS Bistatic Reflectivity and SMAP Microwave Radiometry Brightness Temperature to Geophysical Parameters Over Land Surfaces,” J. Sel. Top. Appl. Earth Obs. Remote Sens., doi: 10.1109/JSTARS.2018.2856588, 2018. [paper]
  16. Ruf, C.S., C. Chew, T. Lang, M.G. Morris, K. Nave, A. Ridley, R. Balasubramaniam, “A New Paradigm in Earth Environmental Monitoring with the CYGNSS Small Satellite Constellation,” Scientific Reports, doi: 10.1038/s41598-018-27127-4, 2018 [paper]
  17. Chew, C., J. T. Reader, E. Small, “CYGNSS data map flood inundation during the 2017 Atlantic hurricane season,” Scientific Reports, doi: 10.1038/s41598-018-27673-3, 2018. [paper]

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Mission Development

  1. Powell, C. E., C. S. Ruf, A. Russel, “An Improved Blackbody Calibration Cadence for CYGNSS,” IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2022.3165001, 2022. [paper]
  2. Gleason, S., M. M. Al-Khaldi, C. Ruf, D. S. McKague, T. Wang, A. Russel, “Characterizing and Mitigating Digital Sampling Effects on the CYGNSS Level 1 Calibration,” IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2021.3120026, 2021. [paper]
  3. Pascual, D., M. P. Clarizia, C. S. Ruf, “Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction,” Remote Sensing, doi: 10.3390/rs13214313, 2021. [paper]
  4. Wang, T., C. S. Ruf, S. Gleason, A. J. O’Brien, D. S. McKague, B. P. Block, A. Russel, “Dynamic Calibration of GPS Effective Isotropic Radiated Power for GNSS-Reflectometry Earth Remote Sensing,” IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2021.3070238, 2021. [paper]
  5. Gleason, S., A. O’Brien, A. Russel, M.M. Al-Khaldi, J.T. Johnson, “Geolocation, Calibration and Surface Resolution of CYGNSS GNSS-R Land Observations,” Remote Sensing, doi: 10.3390/rs12081317, 12, 1317, 2020.  [paper]
  6. Gleason, S., J. Johnson, C. Ruf, C. Bussy-Virat, “Characterizing Background Signals and Noise in Spaceborne GNSS Reflection Ocean Observations,” IEEE Geosci. Remote Sens. Ltrs., doi: 10.1109/LGRS.2019.2926695, 2019. [paper]
  7. Ruf, C., R. Balasubramaniam, “Development of the CYGNSS Geophysical Model Function for Wind Speed,” IEEE J. Sel. Topics Appl. Earth Obs. Remote Sens., doi: 10.1109/JSTARS.2018.2833075, 2018. [paper]
  8. Ruf, C., S. Gleason, D. S. McKague, “Assessment of CYGNSS Wind Speed Retrieval Uncertainty,” IEEE J. Sel. Topics Appl. Earth Obs. Remote Sens., doi: 10.1109/JSTARS.2018.2825948, 2018. [paper]
  9. S. Gleason, S., S. Ruf, A. O’Brien, D. S. McKague, “The CYGNSS Level 1 Calibration Algorithm and Error Analysis Based On On-Orbit Measurements,” IEEE J. Sel. Topics Appl. Earth Obs. Remote Sens., doi: 10.1109/JSTARS.2018.2832981, 2018. [paper]
  10. Bussy-Virat, C. D., C. S. Ruf, A. J. Ridley, “Relationship between temporal and spatial resolution for a constellation of GNSS-R satellites,” IEEE J. Sel. Topics Appl. Earth Obs. Remote Sens., doi: 0.1109/JSTARS.2018.2833426, 2018. [paper]
  11. Clarizia, M., and C. Ruf, “Bayesian Wind Speed Estimation Conditioned on Significant Wave Height for GNSS-R Ocean Observations,” J.  Atmos. Oceanic Techn., doi:10.1175/JTECH-D-16-0196.1, 34(6), 1193-1202, 2017. [paper]
  12. Clarizia, M. P., and C. S. Ruf, “On the Spatial Resolution of GNSS-Reflectometry,” IEEE Geosci. Remote Sens. Ltrs., doi:10.1109/LGRS.2016.2565380, 2016. [paper]
  13. Clarizia, M. P., and C. S. Ruf, “Wind Speed Retrieval Algorithm for the Cyclone Global Navigation Satellite System (CYGNSS) Mission,” IEEE Trans Geosci. Remote Sens., 54(8), doi:10.1109/TGRS.2016.2541343, Aug. 2016. [paper]
  14. Ruf, C., P. Chang, M.P. Clarizia, S. Gleason, Z. Jelenak, J. Murray, M. Morris, S. Musko, D. Posselt, D. Provost, D. Starkenburg, V. Zavorotny, “CYGNSS Handbook,” Ann Arbor, MI, Michigan Pub., ISBN 978-1-60785-380-0, 154 pp, 1 Apr 2016. [handbook]
  15. Clarizia, M. P., Ruf, C.; Jales, P. and Gommenginger, C., “Spaceborne GNSS-R Minimum Variance Wind Speed Estimator,” IEEE Trans Geosci. Remote Sens., 52(11), 6829-6843, doi: 10.1109/TGRS.2014.2303831, Nov. 2014. [paper]
  16. Ruf, C., A. Lyons, M. Unwin, J. Dickinson, R. Rose, D. Rose and M. Vincent, “CYGNSS: Enabling the Future of Hurricane Prediction,” IEEE Geosci. Remote Sens. Mag., Vol. 1, No. 2, 52-67, doi: 10.1109/MGRS.2013.2260911, 2013. [paper]
  17. Ruf, C., A. Lyons and A. Ward, “NASA Intensifies Hurricane Studies with CYGNSS,” The Earth Observer, NASA, Vol. 25, Issue 3, 12-21, May-June 2013. [paper]

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Mission Precursors

  1. Unwin, M., P. Jales, J. Tye, C. Gommenginger, G. Foti, J. Rosello, “Spaceborne GNSS-Reflectometry on TechDemoSat-1: Early Mission Operations and Exploitation,” IEEE J. Sel. TOp. Appl. Earth Obs. Remote Sens., 9(10), 4525-4539, doi: 10.1109/JSTARS.2016.2603846, 2016. [paper]
  2. Katzberg, S. J., J. Dunion, and G. G. Ganoe, “The use of reflected GPS signals to retrieve ocean surface wind speeds in tropical cyclones,” Radio Sci., 48, 371­387, doi:10.1002/rds.20042, 2013. [paper]
  3. Clarizia, M. P., “Investigating the Effect of Ocean Waves on GNSS-R Microwave Remote Sensing Measurements,” Ph.D. diss., Univ. Southampton, 258 pp, 2012. [paper]
  4. Gleason, S., “Remote Sensing of Ocean, Ice and Land Surfaces Using Bistatically Scattered GNSS Signals from Low Earth Orbit,” Ph.D. diss., University of Surrey, UK, 213 pp, 2006. [paper]
  5. Garrison, J. L., A. Komjathy, V. U. Zavorotny and S. J. Katzberg, “Wind Speed Measurement Using Forward Scattered GPS Signals,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 40, No. 1, January 2002. [paper]
  6. Katzberg, S.J., R.A.Walker, J. H. Roles, T. Lynch, and P.G. Black, “First GPS signals reflected from the interior of a tropical storm: Preliminary results from Hurricane Michael,” Geophysical Research Letters, Vol. 28. No. 10, May 15, 2001. [paper]
  7. Martín-Neira, M., M. Caparrini, J. Font-Rossello, S. Lannelongue, C. S. Vallmitjana, “The PARIS Concept: An Experimental Demonstration of Sea Surface Altimetry Using GPS Reflected Signals,” IEEE Trans. Geosci. Remote Sens., 39(1), Publisher Item Identifier S 0196-2892(01)00347-3, 2001. [paper]
  8. Zavorotny, V. U. and A. G. Voronovich, “Scattering of GPS Signals from the Ocean with Wind Remote Sensing Application,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 38, No. 2, March 2000. [paper]
  9. Garrison, J.L. and S.J. Katzberg, “Effect of sea roughness on bistatically scattered range coded signals from the Global Positioning System,” Geophysical Research Letters, Vol. 25, No.13, pp 2257-2260, July 1, 1998. [paper]
  1. Li, W., E. Cardellach, F. Fabra, “First Spaceborne Phase Altimetry over Sea Ice Using TechDemoSat-1 GNSS-R Signals,” Geophys. Res. Ltrs., doi: 10.1002/2017gl074513, 2017. [paper]
  2. Clarizia, M.P., C. Ruf, P. Cipollini and C. Zuffada, “First Spaceborne Observation of Sea Surface Height Using GPS Reflectometry,” Geophysical Research Letters, Vol. 43, doi:10.1002/2015GL066624, 2016. [paper]
  3. Murray, J., C. Ruf, N. Baker, T. Lang, E. Uhlhorn, D. Masters, G. Halliwell, K. Carey, D. Helms, V. Escobar, W. McCarty, D.S. Green, T. Stough and A. Molthan, “Report on the NASA CYGNSS Mission Applications Workshop,” May 2015. [paper]
  4. Clarizia, M. P., C. Gommenginger, M. Di Bisceglie, C. Galdi and M. A. Srokosz, “Simulation of L-Band Bistatic Returns from the Ocean Surface: A Facet Approach With Application to Ocean GNSS Reflectometry,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 50, No. 3, March 2012. [paper]
  5. Gleason, S., C. Gommenginger and D. Cromwell, “Fading Statistics and Sensing Accuracy of Ocean Scattered GNSS and Altimetry Signals,” Journal of Advances in Space Research, Vol. 46, Issue 2, 2010. [paper]
  6. Clarizia, M. P., C. P. Gommenginger, S. T. Gleason, M. A. Srokosz, C. Galdi, and M. Di Bisceglie, “Analysis of GNSS-R Delay-Doppler Maps from the UK-DMC Satellite over the Ocean,” Geophysical Research Letters, Vol. 36, L02608, doi:10.1029/2008GL036292, 2009. [paper]
  7. Katzberg, S. J., O. Torres, and G. Ganoe, “Calibration of Reflected GPS for Tropical Storm Wind Speed Retrievals,” Geophysical Research Letters, Vol. 33, L18602, doi:10.1029/2006GL026825, September 2006. [paper]
  8. Gleason, S., S. Hodgart, Y. Sun, C. Gommenginger, S. Mackin, M. Adjrad, and M. Unwin, “Detection and Processing of Bistatically Reflected GPS Signals from Low Earth Orbit for the Purpose of Ocean Remote Sensing,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 43, No. 6, June 2005. [paper]
  9. Komjathy, A., M. Armatys, D. Masters, P. Axelrad, V. Zavorotny, S. Katzberg, “Retrieval of Ocean Surface Wind Speed and Wind Direction Using Reflected GPS Signals,” Journal of Atmospheric and Oceanic Technology, 21(3), 515-526, 2004. [paper]

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