Skip to main content

Ludger Scherliess

Profile Picture

Physics

Professor

Contact Information

Office Location: SER 316
DialPhone: 435-797-7189
SendEmail: ludger.scherliess@usu.edu


Educational Background

PhD, Physics, Utah State University, 1997
Other, Physics, University of Bonn, 1992
BS, Physics, University of Bonn, 1987

Awards

Editor's Citation for Excellence in Refereeing, 2001

Journal of Geophysical Research - Space Physics

Outstanding Student Paper Award, 1996

American Geophysical Union

Publications - Abstracts

    Publications - Books & Book Chapters

      Book Chapters

    • Scherliess, L., Ionospheric response to X-ray and EUV flux changes during solar flares: A review. AGU Monograph "Ionospheric Space Weather"
    • Fang, T., Anderson, D., Fuller-Rowell, T., Akmaev, R., Codrescu, M., Millward, G., Sojka, J.J, Scherliess, L., Eccles, V., Retterer, J., others, , (2014). Comparative studies of theoretical models in the equatorial ionosphere. Modeling the Ionosphere-Thermosphere System, (eds J. Huba, R. Schunk and G. Khazanov), John Wiley & Sons, Ltd,
    • Shim, J., Kuznetsova, M., Rastätter, L., Bilitza, D., Butala, M., Codrescu, M., Emery, B., Foster, B., Fuller-Rowell, T., Huba, J., Mannucci, A., Pi, X., Ridley, A., Scherliess, L., other, , (2014). Systematic Evaluation of Ionosphere/Thermosphere (IT) Models. Modeling the Ionosphere-Thermosphere System, (eds J. Huba, R. Schunk and G. Khazanov), John Wiley & Sons, Ltd,
    • Scherliess, L., Ionospheric response to X-ray and EUV flux changes 1 during solar flares: A review. AGU Monograph
    • Scherliess, L., Thompson, D.C, Schunk, R., (2011). Data assimilation models: A ‘new’ tool for ionosphere science and applications : The Dynamic Magnetosphere. Springer
    • Schunk, R., Scherliess, L., Thompson, D.C, (2011). Ionosphere data assimilation: Problems associated with missing physics : Aeronomy of the Earth's Atmosphere and Ionosphere. Springer Link
    • Schunk, R., Scherliess, L., Sojka, J.J, Thompson, D.C, (2004). USU global ionospheric data assimilation models : Atmospheric and Environmental Remote Sensing Data Processing and Ulilization: An End-to-End System Perspective . Proc. Of SPIE

    * Has not been peer reviewed

    Publications - Fact Sheets

      * Has not been peer reviewed

      Publications - Curriculum

        * Has not been peer reviewed

        Publications - Journal Articles

          Academic Journal

        • Lomidze, L., Scherliess, L., Schunk, R., (2016). Modeling and analysis of ionospheric evening anomalies with a physics-based data assimilation model. Journal of Atmospheric and Solar-Terrestrial Physics, 140, 65–78. doi: doi:10.1016/j.jastp.2016.02.009
        • Lomidze, L., Scherliess, L., (2015). Estimation of thermospheric zonal and meridional winds using a Kalman filter technique. Space Weather, 13:11, 747–760.
        • Lomidze, L., Scherliess, L., Schunk, R., (2015). Magnetic meridional winds in the thermosphere obtained from Global Assimilation of Ionospheric Measurements (GAIM) model. Journal of Geophysical Research: Space Physics, 120:9, 8025–8044.
        • Balthazor, R.L, McHarg, M.G, Enloe, C.L, Mueller, B., Barnhart, D.J, Hoeffner, Z.W, Brown, R., Scherliess, L., Wilhelm, L.T, (2015). Methodology of evaluating the science benefit of various satellite/sensor constellation orbital parameters to an assimilative data forecast model. Radio Science
        • Gardner, L., Schunk, R., Scherliess, L., Sojka, J.J, Zhu, L., (2014). Global Assimilation of Ionospheric Measurements-Gauss Markov model: Improved specifications with multiple data types. Space Weather, 12:12, 675–688.
        • Sojka, J.J, Schunk, R., Thompson, D., Scherliess, L., David, M., (2013). Ionospheric Weather at Mid-Latitudes. Midlatitude Ionospheric Dynamics and Disturbances, 181, 35.
        • Scherliess, L., Thompson, D., Schunk, R., (2010). Ionospheric dynamics and drivers obtained from a physics-based data assimilation model (DOI 10.1029/2008RS004068). Radio Science, 45:1
        • Shim, J.S, Scherliess, L., Schunk, R., Thompson, D.C, (2010). Neutral wind and plasma drift effects on low- and mid-latitude Total Electron Content . Journal of Geophysical Research, 115:A4
        • Anderson, D., Araujo-Pradere, E., Scherliess, L., (2009). Comparing daytime, equatorial ExB drift velocities and TOPEX/TEC observations associated with the 4-cell, non-migrating tidal structure. Annales Geophysicae, 27, 2861-2867.
        • Scherliess, L., Thompson, D.C, Schunk, R., (2009). Ionospheric dynamics and drivers obtained from a physics-based data assimilation model . Radio Science, 44, doi: 10.1029/ 2008RS004068
        • Thompson, D.C, Scherliess, L., Sojka, J.J, Schunk, R., (2009). Plasmasphere and upper ionosphere contributions and corrections during the assimilation of GPS slant TEC. Radio Science, 44, doi: 10.1029/2008RS004016
        • Sojka, J.J, Schunk, R., Scherliess, L., Thompson, D.C, David, M., (2008). Assimilation of observations with models to better understand severe ionospheric weather at mid-latitudes . Midlatitude Ionospheric Dynamics and Disturbances, Geophysical Monograph 181, 35-49.
        • Shim, J.S, Scherliess, L., Schunk, R.W, Thompson, D.C, (2008). Correlation of Day-to-Day Ionospheric Total Electron Content Variability Obtained from Ground-Based GPS. Journal of Geophysical Research, 113, A01311. doi: 10.1029/2007JA012480
        • Jee, G., Burns, A.G, Wang, W., Solomon, S.C, Schunk, R., Scherliess, L., Thompson, D.C, Sojka, J.J, Zhu, L., (2008). Driving the TING model with GAIM electron densities: ionospheric effects on the thermosphere . J. Geophys. Res., 113, doi: 10.1029/ 2007JA012580
        • Scherliess, L., Thompson, D.C, Schunk, R., (2008). Longitudinal variability of low-latitude Total Electron Content: Tidal influences . J. Geophys. Res., 113, doi: 10.1029/ 2007JA012480
        • Shim, J.S, Scherliess, L., Schunk, R., Thompson, D.C, (2008). Spatial correlations of day-to-day ionospheric Total Electron Content variability obtained from ground-based GPS . J. Geophys. Res., 113, doi: 10.1029/2007JA012635
        • Sojka, J.J, Thompson, D.C, Scherliess, L., Schunk, R., Harris, T.J, (2007). Assessing Models for Ionospheric Weather Specifications Over Australia During the 2004 Climate and Weather of the Sun-Earth-System (CAWSES) Campaign. J. Geophys. Res., 112, A09306. doi: 10.1029/2006JA012048
        • Jee, G., Burns, A.G, Wang, W., Solomon, S.C, Schunk, R., Scherliess, L., Thompson, D.C, Sojka, J.J, Zhu, L., (2007). Duration of an ionospheric data assimilation initialization of a coupled thermosphere-ionosphere model . Space Weather, 5, doi: 10.1029/2006SW000250
        • Bekerat, H.A, Schunk, R., Scherliess, L., (2007). Estimation of the high-latitude topside electron heat flux using DMSP plasma density measurements. J. Atmos. Solar-Terr. Phys., 69, 1029-1048.
        • Thompson, D.C, Scherliess, L., Sojka, J.J, Schunk, R., (2006). The Utah State University Gauss-Markov Kalman Filter of the ionosphere: The effect of slant TEC and electron density profile data on model fidelity . J. Atmos. Solar-Terr. Phys., 68, 947-958.
        • Scherliess, L., Schunk, R., Sojka, J.J, Thompson, D.C, Zhu, L., (2006). Utah State University Global Assimilation of Ionospheric Measurements Gauss-Markov Kalman filter model of the ionosphere: Model description and validation. J. Geophys. Res., 111, doi: 10.1029/2006JA011712
        • Zhu, L., Schunk, R., Gee, J., Scherliess, L., Sojka, J.J, Thompson, D.C, (2006). Validation study of the Ionospheric Forecast Model (IFM) using the TOPEX TEC measurements . Radio Science, 41, doi: 10.1029/2005RS003336
        • Jee, G., Schunk, R., Scherliess, L., (2005). Comparison of IRI-2001 with TOPEX TEC measurements . J. Atmos. Solar-Terr. Phys., 67, 365-380.
        • Barkerat, H., Schunk, R., Scherliess, L., (2005). Comparison of satellite ion drift velocities with AMIE deduced convection patterns . J. Atmos. Solar-Terr. Phys., 67, 1463-1479.
        • Schunk, R., Scherliess, L., Sojka, J.J, Thompson, D.C, Zhu, L., (2005). Ionospheric weather forecasting on the horizon . Space Weather, 3:8, doi: 10.1029/2004SW000138
        • Jee, G., Schunk, R., Scherliess, L., (2005). On the sensitivity of Total Electron Content (TEC) to upper atmospheric/ionospheric parameters. J. Atmos. Solar-Terr. Phys., 67, 1040-1052.
        • Scherliess, L., Schunk, R., Sojka, J.J, Thompson, D.C, (2004). Development of a physics-based reduced state Kalman filter for the ionosphere . Radio Sci., 39, doi: 10.1029/2002RS002797
        • Schunk, R., Scherliess, L., Sojka, J.J, Thompson, D.C, Anderson, D.N, Codrescu, M., Minter, C., Fuller-Rowell, T.J, Heelis, R.A, Hairston, M., Howe, B., (2004). Global assimilation of ionospheric measurements (GAIM) . Radio Sci., 39, doi: 10.1029/2002RS002794
        • Jee, G., Schunk, R., Scherliess, L., (2004). The analysis of TEC data from TOPEX/Poseidon mission . J. Geophys. Res., 109, doi: 10.1029/2003JA010058
        • Bakerat, H.A, Schunk, R., Scherliess, L., (2003). Evaluation of statistical convection patterns for real-time specifications and forecasts . J. Geophys. Res., 108:A12, 1413. doi: 10.1029/ 2003JA009945
        • Schunk, R., Scherliess, L., Sojka, J.J, (2003). Recent approaches to modeling ionospheric weather . Adv. Space Res., 31, 819-828.
        • Parkinson, M., Ujmaia, S., Dyson, P., Fejer, B.G, Scherliess, L., (2001). Electric field measurements at a southern mid-latitude station obtained using an HF digital ionosonde. Advances in Space Research, 27, 1253.
        • Polglase, R., Ujmaia, S., Scherliess, L., Parkinson, M.L, Fejer, B.G, Dyson, P.L, others, , (2001). Electric field measurements at a southern mid-latitude station obtained using an HF digital ionosonde. Kidlington, UK: Pergamon-Esevier Science Ltd,
        • Schunk, R., Scherliess, L., Sojka, J.J, (2001). Ionospheric specification and forecast modeling . AIAA-2001-0236, 1-17.
        • Fejer, B.G, Scherliess, L., (2001). On the variability of equatorial F-region vertical plasma drifts. Journal of Atmospheric and Solar-Terrestrial Physics, 63:9, 893–897.
        • Scherliess, L., Fejer, B.G, Holt, J.M, Goncharenko, L., Armonry-Mazaudier, C., Buonsanto, M.J, (2001). Radar studies of mid-latitude ionospheric plasma drifts. J. Geophys. Res., 106, 1771.
        • Parkinson, M.L, Polglase, R., Fejer, B.G, Scherliess, L., Dyson, P., Ujmaia, S., (2001). Seasonal and magnetic activity variations of ionospheric electric fields above the southernmid-latitude station, Bundoora, Australia. Annales Geophysicae, 19, 521–532.
        • Fejer, B.G, Scherliess, L., Paula, E.d, (1999). Effects of the vertical plasma drift velocity on the generation and evolution of equatorial spread F. Journal of Geophysical Research: Space Physics (1978–2012), 104:A9, 19859–19869.
        • Scherliess, L., Fejer, B.G, (1999). Radar and satellite global equatorial F region vertical drift model. Journal of Geophysical Research: Space Physics (1978–2012), 104:A4, 6829–6842.
        • Fejer, B.G, Scherliess, L., (1998). Mid-and low-latitude prompt-penetration ionospheric zonal plasma drifts. Geophysical research letters, 25:16, 3071–3074.
        • Scherliess, L., Fejer, B.G, (1998). Satellite studies of mid-and low-latitude ionospheric disturbance zonal plasma drifts. Geophysical research letters, 25:9, 1503–1506.
        • Fejer, B.G, Scherliess, L., (1997). Empirical models of storm time equatorial zonal electric fields. Journal of Geophysical Research: Space Physics (1978–2012), 102:A11, 24047–24056.
        • Zuzic, M., Scherliess, L., Prölss, G., (1997). Latitudinal structure of thermospheric composition perturbations. Journal of Atmospheric and Solar-Terrestrial Physics, 59:6, 711–724.
        • Fejer, B.G, de Paula, E., Scherliess, L., (1997). Low altitude ionospheric plasma drift models. Advances in Space Research, 20:9, 1790.
        • Scherliess, L., Fejer, B.G, (1997). Storm-time dependence of equatorial disturbance dynamo zonalelectric fields. Journal of Geophysical Research, 102:A11, 24037–24046.
        • Fejer, B.G, de Paula, E.R, Scherliess, L., Batista, I.S, (1996). Incoherent scatter radar, ionosonde, and satellite measurements of equatorial F region vertical plasma drifts in the evening sector. Geophysical research letters, 23:14, 1733–1736.
        • Fejer, B.G, Scherliess, L., (1995). Time dependent response of equatorial ionospheric electric fieldsto magnetospheric disturbances. Geophysical Research Letters, 22:7, 851–854.
        • Professional Journal

        • Schunk, R., Scherliess, L., Eccles, V., Gardner, L.C, Sojka, J.J, Zhu, L., Pi, X., Mannucci, A., Wilson, B., Komjathy, A., Wang, C., Rosen, G., (2014). Ensemble Modeling with Data Assimilation Models: A New Strategy for Space Weather Specifications, Forecasts, and Science. Space Weather Journal, 12, 123-126. doi: doi:10.1002/2014SW001050214
        • Zhu, L., Schunk, R., Eccles, V., Scherliess, L., Sojka, J.J, Gardner, L., (2014). Terminator Field-aligned Currents: A new Finding from the Ionospheric Dynamics andElectrodynamics Data Assimilation Model. Journal of Geophysical Rsearch - Space Physics, 119:6, 4752-4757. doi: doi:10.1002/2013JA019518
        • Shim, J., Kuznetsova, M., Rastatter, L., Bilitza, D., Butala, M., Codrescu, M., Emery, B.A, Foster, B., Fuller-Rowell, T.J, Huba, J., Mannucci, A.J, Pi, X., Ridley, A., Scherliess, L., Schunk, R., Sojka, J.J, Stephens, P., Thompson, D.C, Weimer, D., Zhu, L., Sutton, E., (2012). CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge for Systematic Assessment of Ionosphere/Thermosphere Models 2: Electron Density, Neutral Density, NmF2 and hmF2 Using Space Based Observations. Space Weather Journal, 10, S10004. doi: dx.doi.org/10.1029/2012SW000851
        • Zhu, L., Schunk, R., Scherliess, L., Eccles, J.V, (2012). Importance of data assimilation technique in defining the model drivers for the space weather specification of the high-latitude ionosphere. Radio Science, 47, RS0L24. doi: doi:10.1029/2001RS004936
        • Schunk, R., Gardner, L.C, Scherliess, L., Zhu, L., (2012). Problems associated with uncertain parameters and missing physics for long-term ionosphere-thermosphere forecasting. Radio Science, 47, RS0L23. doi: doi:10.1029/2011RS004911
        • Shim, J.S, Kuznetosova, M., Rastatter, I., Hesse, M., Bilitza, D., Butala, M., Codrescu, M., Emery, B., Foster, B., Fuller-Rowell, T., Huba, J., Mannucci, A.J, Pi, X., Ridley, A., Scherliess, L., Schunk, R., Stephens, P., Thompson, D.C, Zhu, L., Anderson, D., Chau, J.L, Sojka, J.J, Rideout, B., (2011). CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge for Systematic Assessment of Ionosphere/Thermosphere Models: NmF2, hmF2, and Vertical Drift Using Ground-based Observations. Space Weather, 9, S12003. doi: doi:10.1029/2011SW000727

        * Has not been peer reviewed

        Publications - Literary Journal

          * Has not been peer reviewed

          Publications - MultiMedia

            * Has not been peer reviewed

            Publications - Technical Reports

              Other Reports

            • Scherliess, L., (2015). GAIMFP: Users Guide. GAIM-FP V2.0 Delivery
            • Scherliess, L., Schunk, R., Thompson, D., Zhu, L., (2011). Assimilation of Ionospheric Measurements–Full Physics (GAIM-FP). Guide to Reference and Standard Ionosphere Models, American Institute for Aeronautics and Astronautics *
            • Schunk, R., Scherliess, L., Thompson, D., Zhu, L., (2011). Global Assimilation of Ionospheric Measurements–Gauss-Markov (GAIM-GM). Guide to Reference and Standard Ionosphere Models, American Institute for Aeronautics and Astronautics *
            • Schunk, R., Scherliess, L., Thompson, D., Zhu, L., (2011). Ionosphere- Plasmasphere Model (IPM). Guide to Reference and Standard Ionosphere Models, American Institute for Aeronautics and Astronautics *

            * Has not been peer reviewed

            Publications - Translations & Transcripts

              Publications - Other

                * Has not been peer reviewed

                Scheduled Teaching

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2016

                PHYS 5350 - Methods of Theoretical Physics II, Spring 2016

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2015

                PHYS 3900 - Projects in Physics, Summer 2015

                GEO,PHYS 3150 - Energy in the Twenty-first Century, Spring 2015

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2014

                PHYS 5350 - Methods of Theoretical Physics II, Spring 2014

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2013

                PHYS 5350 - Methods of Theoretical Physics II, Summer 2013

                PHYS 7990 - Continuing Graduate Advisement, Spring 2013

                GEO,PHYS 3150 - Energy in the Twenty-first Century, Spring 2013

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2012

                PHYS 5350 - Methods of Theoretical Physics II, Spring 2012

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2011

                PHYS 7970 - DISSERTATION RSRCH, Spring 2011

                PHYS 5350 - THEORETICAL PHYX II, Spring 2011

                PHYS 7970 - Dissertation Research, Fall 2010

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2010

                PHYS 5350 - THEORETICAL PHYX II, Spring 2010

                PHYS 3010 - Space Exploration from Earth to the Solar System, Fall 2009

                PHYS 5350 - THEORETICAL PHYX II, Spring 2009

                PHYS 3600 - Electromagnetism 1, Fall 2008

                PHYS 5350 - THEORETICAL PHYX II, Spring 2008

                PHYS 3600 - Electromagnetism 1, Fall 2007


                Graduate Students Mentored

                Ivana Molina, Physics
                Levan Lomidze, Physics 2016
                Ja Soon Shim, 2009