Articles, Papers and Reports

Articles and papers

2024

• Paz, A.; Padullés, R.; Cardellach, E. (2024). Evaluating the Polarimetric Radio Occultation Technique Using NEXRAD Weather Radars, Remote Sens., 16, 1118, doi:10.3390/rs16071118.
• Leroy, S. S., McVey, A. E., Leidner, S. M., Zhang, H., & Gleisner, H. (2024). GNSS radio occultation data in the AWS cloud, Earth and Space Science, 11, e2023EA003021. doi: 10.1029/2023EA003021.
• Elvidge, S., Healy, S. B., & Culverwell, I. D. (2024). One-dimensional variational ionospheric retrieval using radio occultation bending angles: 2. Validation. Space Weather, 22, e2023SW003571. doi:10.1029/2023SW003571.
• Culverwell, I. D., Healy, S. B., & Elvidge, S. (2024). One-dimensional variational ionospheric retrieval using Radio Occultation bending angles: 1. Theory. Space Weather, 22, e2023SW003572. doi:10.1029/2023SW003572.

2023

• Olivares-Pulido, G., Hernández-Pajares, M., Monte-Moreno, E., Lyu, H., Graffigna, V., Cardellach, E., Hoque, M., Prol, F.S., Notarpietro, R. and Garcia-Fernandez, M., 2023. Real-Time Tomographic Inversion of Truncated Ionospheric GNSS Radio Occultations. Remote Sensing, 15(12), p.3176, doi:10.3390/rs15123176.
• Ladstädter, F., Steiner, A.K. & Gleisner, H. Resolving the 21st century temperature trends of the upper troposphere-ower stratosphere with satellite observations. Sci Rep 13, 1306 (2023). doi: 10.1038/s41598-023-28222-x.

2022

• Syndergaard, S., and G. Kirchengast. 2022. Systematic Ionospheric Residual Errors in GNSS Radio Occultation: Theory for Spherically Stratified Media. Earth and Space Science 9 (10). doi:10.1029/2022EA002335.
• Nielsen, J. K., Gleisner, H., Syndergaard, S., and Lauritsen, K. B.: Estimation of refractivity uncertainties and vertical error correlations in collocated radio occultations, radiosondes, and model forecasts, Atmos. Meas. Tech., 15, 6243-6256, doi:10.5194/amt-15-6243-2022, 2022.
• Leroy, S. S., and Gleisner, H., 2022. The stratospheric diurnal cycle in COSMIC GPS radio occultation data: Scientific applications, Earth and Space Science 9, e2021EA002011, doi:10.1029/2021EA002011.
• Semane, N., Anthes, R., Sjoberg, J., Healy, S., & Ruston, B. (2022). Comparison of Desroziers and Three-Cornered Hat Methods for Estimating COSMIC-2 Bending Angle Uncertainties, Journal of Atmospheric and Oceanic Technology, 39(7), 929-939. doi:10.1175/JTECH-D-21-0175.1, Retrieved Jul 7, 2022.
• Gleisner, H., Ringer, M. A., & Healy, S. B. Monitoring global climate change using GNSS radio occultation, npj Clim Atmos Sci 5, 6 (2022). doi:10.1038/s41612-022-00229-7, 2022.

2021

• Gorbunov, M., Kirchengast, G., and Lauritsen, K. B.: Generalized canonical transform method for radio occultation sounding with improved retrieval in the presence of horizontal gradients, Atmos. Meas. Tech., 14, 853-867, doi:10.5194/amt-14-853-2021, 2021.

2020

• Liu, C., Kirchengast, G., Syndergaard, S., Schwaerz, M., Danzer, J., Sun, Y., New Higher-Order Correction of GNSS RO Bending Angles Accounting for Ionospheric Asymmetry: Evaluation of Performance and Added Value, Remote Sens., 12, 3637. doi:10.3390/rs12213637, 2020.
• Steiner, A. K., Ladstädter F., Randel, W. J., Maycock, A. C., Fu, Q., Claud, C., Gleisner, H., Haimberger, L., Ho, S.-P., Keckhut, P., Leblanc, T., Mears,C., Polvani, L. M., Santer, B. D., Schmidt, T., Sofieva, V., Wing, R., Zou, C. -Z., 2020: Observed Temperature Changes in the Troposphere and Stratosphere from 1979 to 2018. J. Climate, 33, 8165-8194, doi:10.1175/JCLI-D-19-0998.1, 2020.
• Healy, B, Polichtchouk, I., Horányi, A.. Monthly and zonally averaged zonal wind information in the equatorial stratosphere provided by GNSS radio occultation. Q J R Meteorol Soc.; 1- 10. doi:10.1002/qj.3870, 2020.
• Danzer, J., Schwaerz, M., Kirchengast, G., & Healy, S. B. (2020). Sensitivity analysis and impact of the kappa-correction of residual ionospheric biases on radio occultation climatologies, Earth and Space Science, 7, e2019EA000942. doi:10.1029/2019EA000942, 2020.
• Gleisner, H., Lauritsen, K. B., Nielsen, J. K., and Syndergaard, S., Evaluation of the 15-year ROM SAF monthly mean GPS radio occultation climate data record, Atmos. Meas. Tech., 13, 3081-3098, doi:10.5194/amt-13-3081-2020, 2020.
• Steiner, A. K., Ladstädter, F., Ao, C. O., Gleisner, H., Ho, S.-P., Hunt, D., Schmidt, T., Foelsche, U., Kirchengast, G., Kuo, Y.-H., Lauritsen, K. B., Mannucci, A. J., Nielsen, J. K., Schreiner, W., Schwärz, M., Sokolovskiy, S., Syndergaard, S., and Wickert, J., Consistency and structural uncertainty of multi-mission GPS radio occultation records, Atmos. Meas. Tech., 13, 2547-2575, doi:10.5194/amt-13-2547-2020, 2020.

2019

• Lyu, H., Hernández-Pajares, M., Monte-Moreno, E., & Cardellach, E. (2019). Electron density retrieval from truncated radio occultation GNSS data. Journal of Geophysical Research: Space Physics, 124, 4842-4851. doi:10.1029/2019JA026744, 2019.
• Li, Y., Kirchengast, G., Scherllin-Pirscher, B., Schwaerz, M., Nielsen, J.K., Ho, S.-P., Yuan, Y.-B, A New Algorithm for the Retrieval of Atmospheric Profiles from GNSS Radio Occultation Data in Moist Air and Comparison to 1DVar Retrievals, Remote Sens., 11, 2729, doi:10.3390/rs11232729, 2019.
• Liao, M., Healy, S., and Zhang, P., Processing and quality control of FY-3C GNOS data used in numerical weather prediction applications, Atmos. Meas. Tech., 12, 2679-2692, doi:10.5194/amt-12-2679-2019, 2019.

2018

• J. Danzer, M. Schwärz, V. Proschek, U. Foelsche and H. Gleisner, Comparison study of COSMIC RO dry-air climatologies based on average profile inversion, Atmos. Meas. Tech., 11, 4867-4882, doi:10.5194/amt-11-4867-2018, 2018.
• R. Padullés, E. Cardellach, K.-N. Wang, C. O. Ao, F. J. Turk and M. de la Torre-Juárez, Assessment of global navigation satellite system (GNSS) radio occultation refractivity under heavy precipitation, Atmos. Chem. Phys., 18, 11697-11708, doi:10.5194/acp-18-11697-2018, 2018.
• J. M. Aparicio, E. Cardellach, and H. Rodríguez., Information content in reflected signals during GPS Radio Occultation observations, Atmos. Meas. Tech., 11, 1883-1900, doi:10.5194/amt-11-1883-2018, 2018.
• Matthew J. Angling, Sean Elvidge, and Sean B. Healy, Improved model for correcting the ionospheric impact on bending angle in radio occultation measurements, Atmos. Meas. Tech., 11, 2213-2224, doi:10.5194/amt-11-2213-2018, 2018.
• M. E. Gorbunov, E. Cardellach and K. B. Lauritsen, Reflected ray retrieval from radio occultation data using radio holographic filtering of wave fields in ray space, Atmos. Meas. Tech., 11, 1181-1191, doi:10.5194/amt-11-1181-2018, 2018.

2017

• Khaykin, S. M., et al. (2017), Postmillennium changes in stratospheric temperature consistently resolved by GPS radio occultation and AMSU observations, Geophys. Res. Lett., 44, 7510-7518, doi:10.1002/2017GL074353, 2017
• E. Cardellach, R. Padullés, S. Tomás, F. J. Turk, C. O. Ao and M. de la Torre-Juárez, Probability of intense precipitation from polarimetric GNSS radio occultation observations, Q.J.R. Meteorol. Soc., doi:10.1002/qj.3161, 2017.
• R. Padullés, E. Cardellach and A. Rius, Untangling rain structure from polarimetric GNSS Radio Occultation observables: a 2D tomographic approach, European Journal of Remote Sensing, 49:1, 571-585, doi:10.5721/EuJRS20164930, 2017.
• Jordis S Tradowsky, Chris P Burrows, Sean B Healy and John Eyre, A New Method to Correct Radiosonde Temperature Biases Using Radio Occultation Data, J Appl. Meteorol and Clim., 56:6, 1643-1661, 2017.

2016

• R. Padullés, E. Cardellach, M. de la Torre Juárez, S. Tomás, F. J. Turk, S. Oliveras, C. O. Ao, and A. Rius, Atmospheric polarimetric effects on GNSS radio occultations: the ROHP-PAZ field campaign, Atmos. Chem. Phys., 16, 635-649, doi:10.5194/acp-16-635-2016, 2016.

2015

• M. E. Gorbunov, V. V. Vorob'ev, and K. B. Lauritsen, Fluctuations of refractivity as a systematic error source in radio occultations, Radio Sci., 50, 656-669, doi:10.1002/2014RS005639, 2015.
• Culverwell, I. D., Lewis, H. W., Offiler, D., Marquardt, C., and Burrows, C. P., The Radio Occultation Processing Package, ROPP, Atmos. Meas. Tech., 8, 1887-1899, doi:10.5194/amt-8-1887-2015, 2015.
• S. B. Healy and I. D. Culverwell, A modification to the ionospheric correction method used in GPS radio occultation, Atmos. Meas. Tech., 8, 3385-3393, doi:10.5194/amt-8-3385-2015, 2015.
• J. Danzer, S. B. Healy, and I. D. Culverwell, A simulation study with a new residual ionospheric error model for GPS radio occultation climatologies, Atmos. Meas. Tech., 8, 3395-3404, doi:10.5194/amt-8-3395-2015, 2015.
• H. Gleisner, P. Thejll, B. Christiansen and J. K. Nielsen, Recent global warming hiatus dominated by low latitude temperature trends in surface and troposphere data, Geophys. Res. Lett., 1944-8007, doi:10.1002/2014GL062596, 2015.
• B. Scherllin-Pirscher, S. Syndergaard, U. Foelsche and K. B. Lauritsen, Generation of a bending angle radio occultation climatology (BAROCLIM) and its use in radio occultation retrievals, Atmos. Meas. Tech., 8, 109-124, doi:10.5194/amt-8-109-2015, 2015.

2014

• C. Cardinali, S. B. Healy, Impact of GPS radio occultation measurements in the ECMWF system using adjoint-based diagnostics,Q.J.R. Meteorol. Soc., 140: 2315-2320, doi: 10.1002/qj.2300, 2014.
• C. P. Burrows, S. B. Healy, and I. D. Culverwell, Improving the bias characteristics of the ROPP refractivity and bending angle operators, Atmos. Meas. Tech., 7, 3445-3458, doi:10.5194/amt-7-3445-2014, 2014.
• J. Danzer, H. Gleisner, and S. B. Healy, CHAMP climate data based on the inversion of monthly average bending angles, Atmos. Meas. Tech., 7, 4071-4079, doi:10.5194/amt-7-4071-2014, 2014.

2013

• H. Gleisner and S. B. Healy, A simplified approach for generating GNSS radio occultation refractivity climatologies, Atmos. Meas. Tech., 6, 121-129, doi: 10.5194/amt-6-121-2013, 2013.
• A. K. Steiner, D. Hunt, S.-P. Ho, G. Kirchengast, A. J. Mannucci, B. Scherllin-Pirscher, H. Gleisner, A. von Engeln, T. Schmidt, C. Ao, S. S. Leroy, E. R. Kursinski, U. Foelsche, M. Gorbunov, S. Heise, Y.-H. Kuo, K. B. Lauritsen, C. Marquardt, C. Rocken, W. Schreiner, S. Sokolovskiy, S. Syndergaard, and J. Wickert, Quantification of Structural Uncertainty in Climate Data Records from GPS Radio Occultation, Atmos. Chem. Phys., 13, 1469-1484, doi: 10.5194/acp-13-1469-2013, 2013.
• S. B. Healy, Surface Pressure Information Retrieved from GPS Radio Occultation Measurements, Q.J.R. Meteorol. Soc., doi: 10.1002/qj.2090, 2013.

2012

• S.-P. Ho, D. Hunt, A. K. Steiner, A. J. Mannucci, G. Kirchengast, H. Gleisner, S. Heise, A. von Engeln, C. Marquardt, S. Sokolovskiy, W. Schreiner, B. Scherllin-Pirscher, C. Ao, J. Wickert, S. Syndergaard, K. B. Lauritsen, S. Leroy, E. R. Kursinski, Y.-H. Kuo, U. Foelsche, T. Schmidt, and M. Gorbunov, Reproducibility of GPS radio occultation data for climate monitoring: Profile-to-profile inter-comparison of CHAMP climate records 2002 to 2008 from six data centers, Journal of Geophysical Research, Vol. 117, D18111, doi: 10.1029/2012JD017665, 2012.

2011

• U. Foelsche, S. Syndergaard, J. Fritzer, and G. Kirchengast, Errors in GNSS radio occultation data: relevance of the measurement geometry and obliquity of profiles, Atmos. Meas. Tech., 4, 189-199, doi: 10.5194/amt-4-189-2011, 2011.
• M. E. Gorbunov, Lauritsen, K. B., Benzon, H.-H., Larsen, G. B., Syndergaard, S., and Sørensen, M. B., Processing of GRAS/METOP radio occultation data recorded in closed-loop and raw-sampling modes, Atmos. Meas. Tech., 4, 1021-1026, doi: 10.5194/amt-4-1021-2011, 2011.
• M. E. Gorbunov, V. Shmakov, S. S. Leroy, and K. B. Lauritsen, COSMIC Radio Occultation Processing: Cross-Center Comparison and Validation, J. Atmos. Oceanic Technol., 28, 737-751, doi: 10.1175/2011JTECHA1489.1, 2011.
• S. B. Healy, Refractivity coefficients used in the assimilation of GPS radio occultation measurements, Journal of Geophysical Research, Vol. 116, D01106, doi: 10.1029/2010JD014013, 2011.
• K. B. Lauritsen, S. Syndergaard, H. Gleisner, M. E. Gorbunov, F. Rubek, M. B. Sørensen, and H. Wilhelmsen, Processing and validation of refractivity from GRAS radio occultation data, Atmos. Meas. Tech., 4, 2065-2071, doi: 10.5194/amt-4-2065-2011, 2011.

2010

• M. E. Gorbunov, K. B. Lauritsen, and S. S. Leroy, Application of Wigner distribution function for analysis of radio occultations, Radio Sci., 45, RS6011, doi: 10.1029/2010RS004388, 2010.
• P. Poli, S. B. Healy, and D. P. Dee, Assimilation of Global Positioning System radio occultation data in the ECMWF ERAInterim reanalysis, Q. J. R. Meteorol. Soc. 136: 19721990. doi: 10.1002/qj.722, 2010.
• M. P. Rennie, The impact of GPS radio occultation assimilation at the Met Office, Quarterly Journal of the Royal Meteorological Society, Vol. 136, No. 646, pp. 116-131. doi: 10.1002/qj.521, 2010.
• F. Xie, D. L. Wu, C. O. Ao, E. R. Kursinski, A. J. Mannucci, and S. Syndergaard, Super-refraction effects on GPS radio occultation refractivity in marine boundary layers, GEOPHYSICAL RESEARCH LETTERS, VOL. 37, L11805, doi: 10.1029/2010GL043299, 2010.

2009

• A. von Engeln,, S. Healy, C. Marquardt, Y. Andres, and F. Sancho, Validation of Operational GRAS Radio Occultation Data, Geophys. Res. Lett., vol. 36, L17809, doi: 10.1029/2009GL039968, 2009.
• M. E. Gorbunov and K. B. Lauritsen, Error Estimate of Bending Angles in the Presence of Strong Horizontal Gradients , pp. 17-26, in: "New Horizons in Occultation Research: Studies in Atmosphere and Climate", Steiner, A.; Pirscher, B.; Foelsche, U.; Kirchengast, G. (Eds.), Springer 2009.
• H. W. Lewis, A Robust Method for Tropopause Altitude Identification Using GPS Radio Occultation Data, Geophys. Res. Lett., vol. 36, L12808, doi: 10.1029/2009GL039231, 2009.
• A. Löscher, K. B. Lauritsen, and M. Sørensen, The GRAS SAF Radio Occultation Processing Intercomparison Project ROPIC , pp.47-60, in: "New Horizons in Occultation Research: Studies in Atmosphere and Climate", Steiner, A.; Pirscher, B.; Foelsche, U.; Kirchengast, G. (Eds.), Springer 2009.

2008

• A. Löscher, C. Retscher, L. Fusco, P. Goncalves, F. Brito, G. Kirchengast, Variational optimization for global climate analysis on ESA's high performance computing grid, Remote Sensing of Environment 112 (2008) 1450-1463, 2008.
• M. A. Ringer and S. B. Healy, Monitoring twenty-first century climate using GPS radio occultation bending angles, Geophys. Res. Lett., 35, L05708, doi: 10.1029/2007GL032462, 2008.

2007

• S. B. Healy, J. Wickert, G. Michalak, T. Schmidt and G. Beyerle, Combined forecast impact of GRACE-A and CHAMP GPS radio occultation bending angle profiles, Atmospheric Science Letters, Volume 8, Issue 2, pages 43-50, doi: 10.1002/asl.149, 2007
• M. E. Gorbunov and K. B. Lauritsen, Asymptotic methods of calculating the propagation of centimeter radio waves in the atmosphere in space-space paths, Izvestiya, Atmospheric and Oceanic Physics, Vol. 43, No. 6, pp. 745-754., doi: 10.1134/S0001433807060084, 2007
• M. E. Gorbunov and K. B. Lauritsen, Linearized Zverev Transform and its application for modeling radio occultations , Radio Science, Vol. 42, RS3023 (9pp), doi: 10.1029/2006RS003590, 2007
• S. B. Healy, J. R. Eyre, M. Hamrud and J.-N. Thépaut, Assimilating GPS radio occultation measurements with two-dimensional bending angle observation operators Q. J. R. Meteorol. Soc., 133, pp. 1213-1227, doi: 10.1002/qj.63, 2007

2006

• G. Beyerle, T. Schmidt, J. Wickert, S. Heise, M. Rothacher, G. Konig-Langlo, and K. B. Lauritsen, Observations and simulations of receiver-induced refractivity biases in GPS radio occultation, JGR, vol 111, D12101, doi: 10.1029/2005JD006673, 2006.
• M. E. Gorbunov, K. B. Lauritsen, A. Rhodin, M. Tomassini, and L. Kornblueh, Radio holographic filtering and error estimation of radio occultation data, JGR, vol 111, D10105, doi: 10.1029/2005JD006427, 2006.
• M. E. Gorbunov and K. B. Lauritsen, Asymptotic wave optics methods in inversion and direct modeling of radio occultations: recent achievements, pp.81-94 in: 'Atmosphere and Climate: Studies by Occultation Methods', U. Foelsche, G. Kirchengast, A. Steiner, eds., Springer Verlag, 2006
• M. E. Gorbunov and K. B. Lauritsen, Radio holographic filtering of noisy radio occultations, pp.127-134 in: 'Atmosphere and Climate: Studies by Occultation Methods', U. Foelsche, G. Kirchengast, A. Steiner, eds., Springer Verlag, 2006
• J. Schulz, R. Lindau, N. Selbach, K. B. Lauritsen, H. Gleisner, Comparison of ATOVS, CHAMP and ground based humidity estimates on different spatiotemporal scales, Proceedings of the 15th International TOVS Study Conference (ITSC 15), October 2006

2005

• M. E. Gorbunov and K. B. Lauritsen, Canonical Transform Methods for Analysis of Radio Occultations in: 'Earth Observation with CHAMP: Results from Three Years in Orbit', pp.519-524, eds. C. Reigber, H. Luehr, P. Schwintzer, and J. Wickert, Springer Verlag, Berlin, 2005
• M. E. Gorbunov, K. B. Lauritsen, A. Rodin, M. Tomassini, and L. Kornblueh, Analysis of the CHAMP Experimental Data on Radio-Occultation Sounding of the Earth's Atmosphere (translated from Russian), Izvestiya, Atmospheric and Oceanic Physics, vol 41, no. 6, pp, 726-740, 2005.
• Larsen, G.B., S. Syndergaard, P. Høeg, and M.B. Sørensen, Single frequency processing of Ørsted GPS radio occultation measurements, GPS Solut (2005) 9: 144-155, doi: 10.1007/s10291-005-0142-x, Springer Verlag 2005.
• S. B. Healy, A. M. Jupp, and C. Marquardt, Forecast impact experiment with GPS radio occultation measurements, Geophys. Res. Lett., 32, L03804, doi: 10.1029/2004GL020806, 2005.
• S. B. Healy and J.-N. Thépaut, Assimilation experiments with CHAMP GPS radio occultation measurements, Q. J. R. Meteorol. Soc., 132, pp. 605-623, 2006

2001 - 2004

• S. Healy, Smoothing radio occultation bending angles above 40 km, Annales Geophysicae 19, pp. 459-468, 2001
• A. D. Collard, S. Healy, The combined impact of future space-based atmospheric sounding instruments on numerical wheather prediction, Q. J. R. Meteorol. Soc. 129, pp. 2741-2760, 2003
• M. E. Gorbunov and K. B. Lauritsen, Analysis of wave fields by Fourier integral operators and their application for radio occultations, Radio Science, Vol. 39(4), RS4010, doi: 10.1029/2003RS002971 (15pp), 2004

Reports

2008

• M. Rennie, Report on the Assimilation of GPS Radio Occultation data into the Met Office global model
  Met Office Forecasting Research Technical Report No. 510, Exeter, UK, 2008

2005

• M. E. Gorbunov and K. B. Lauritsen, Radio holographic filtering of noisy radio occultations
  DMI Scientific Report 05-06, DMI, Copenhagen, 2005
• M. E. Gorbunov, Operational Processing of CH AMP Data: Mathematical Methods, Data Filtering and Quality Control
  DMI Scientific Report 05-07, DMI, Copenhage n, 2005
• S. de Haan, Global Maps from GPS Radio Occul tation Data
  DMI Scientific Report 05-08, DMI, Copenhagen, 2005
• G. Beyerle, Simulating GPS Radio Occultation Events
  DMI Technical Report 05-09, DMI, Copenhagen, 2005
• K. B. Lauritsen and F. Rubek, editors, 'GRAS SAF Open Loop Workshop', (see GOLW 2005)
  DMI Technical Report 05-11, DMI, Copenhagen, 2005

2001 - 2004

• M. E. Gorbunov, Radioholographic methods for processing radio occultation data in multipath regions
  DMI Scientific Report No. 01-02, DMI, Copenhagen, 2001
• M. E. Gorbunov, K. B. Lauritsen, Canonical Transform Methods for Radio Occultation Data
  DMI Scientific Report No. 02-10, DMI, Copenhagen, 2002
• K. B. Lauritsen, M. S. Lohmann, Unfolding of Radio Occultation Multipath Behavior Using Phase Models
  DMI Scientific Report No. 02-11, DMI, Copenhagen, 2002
• A. K. Steiner, Error Analyses of Refractivity Profiles Retrieved from CHAMP Radio Occultation Data
  DMI Scientific Report 04-02, Copenhagen, 2004
• J. Wickert, Comparison of Vertical Refractivity and Temperature Profiles From CHAMP With Radiosonde Measurements
  DMI Scientific Report 04-09, DMI, Copenhagen, 2004