In Progress
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A Radio Search for Lightning at Mars Using the Mars Express MARSIS Instrument
D.A. Gurnett, D.D. Morgan, L.J. Granroth, A.J. Kopf, Z. Girazian, and B.A. Cantor
J. Geophys. Res. Planets, In Preparation |
2020
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Martian Ionopause: Coincidence with Photoelectron Boundary and Response to Internal and External Drivers
F. Duru, N. Baker, M. De Boer, A. Chamberlain, R. Verchimak, D. Morgan, J. Halekas, F. Chu, Z. Girazian, D. Gurnett, and A.J. Kopf
J. Geophys. Res. Space Physics, Submitted, doi:10.1029/2019JA027409 |
2019
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Online
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Mars' Ionospheric Interaction with Comet C/2013 A1 Siding-Spring's Coma at their Closest Approach as Seen by Mars Express
B. Sanchez-Cano, M. Lester, O.G. Witasse, D.D. Morgan, H. Opgenoorth, D.J. Andrews, P.-L. Blelly, S.W.H. Cowley, A.J. Kopf, F. Leblanc, and J.R. Espley
J. Geophys. Res. Space Physics, In Press, doi:10.1029/2019JA027344 |
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Observations of Sounder Accelerated Electrons by Mars Express
A. Voshchepynets, S. Barabash, M. Holmstrom, R.A. Frahm, H. Nillsson, D. Andrews, A.J. Kopf, and J.D. Winningham
J. Geophys. Res. Space Physics, In Press, doi:10.1029/2019JA027206 |
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Variations in the Ionospheric Peak Altitude at Mars in Response to Dust Storms: 13 Years of Observations from the Mars Express Radar Sounder
Z. Girazian, Z. Luppen, D.D. Morgan, F. Chu, L. Montabone, E.M.B. Thiemann, D.A. Gurnett, J.S. Halekas, A.J. Kopf, and F. Nemec
J. Geophys. Res. Planets, Published Online, doi:10.1029/2019JE006092 |
Online
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Mars' Plasma System: Scientific Potential of Coordinated Multi-Point Missions: "The Next Generation"
B. Sanchez-Cano, M. Lester, D.J. Andrews, H. Opgenoorth, R. Lillis, F. Leblanc, C.M. Fowler, Z. Fang, O. Vaisberg, M. Mayyasi, M. Holmberg, J. Guo, M. Hamrin, C. Mazelle, K. Peter, M. Patzold, K. Stergiopoulou, C. Goetz, V.N. Ermakov, S. Shuvalov, J. Wild, P.-L. Blelly, M. Mendillo, C. Bertucci, M. Cartacci, R. Orosei, F. Chu, A.J. Kopf, Z.R. Girazian, and M.T. Roman
ESA's Voyage 2050 Call White Paper |
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The Effects of Crustal Magnetic Fields and Solar EUV Flux on Ionopause Formation at Mars
F. Chu, Z. Girazian, D.A. Gurnett, D.D. Morgan, J.S. Halekas, A.J. Kopf, E.M.B. Thiemann, and F. Duru
Geophys. Res. Lett., 46, 10257-10266, doi:10.1029/2019GL083499
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The Effects of Solar Wind Dynamic Pressure on the Structure of the Topside Ionosphere of Mars
Z. Girazian, J.S. Halekas, D.D. Morgan, A.J. Kopf, D.A. Gurnett, and F. Chu
Geophys. Res. Lett., 46, 8652-8662, doi:10.1029/2019GL083643 |
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Extremely High Plasma Densities in the Mars Ionosphere Associated With Cusp-like Magnetic Fields
K. Fallows, P. Withers, D.D. Morgan, and A.J. Kopf
J. Geophys. Res. Space Physics, 124, 6029-6046, doi:10.1029/2019JA026690 |
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Origin of the Extended Mars Radar Blackout of September 2017
B. Sanchez-Cano, P.-L. Blelly, M. Lester, O.G. Witasse, M. Cartacci, R. Orosei, H. Opgenoorth, R. Lillis, F. Leblanc, S. Milan, P. Conroy, N. Floury, J. Plane, A. Cicchetti, R. Noschese, and A.J. Kopf
J. Geophys. Res. Space Physics, 124, 4556-4568, doi:10.1029/2018JA026403 |
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Oblique Reflections of Mars Express MARSIS Radar Signals from Ionospheric Density Structures: Raytracing Analysis
F. Nemec, D.J. Andrews, D.D. Morgan, A.J. Kopf, and D.A. Gurnett
J. Geophys. Res. Planets, 124, 1177-1187,
doi:10.1029/2018JE005891 |
2018
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Characterizing Average Electron Densities in the Martian Dayside Upper Ionosphere
F. Nemec, D.D. Morgan, A.J. Kopf, D.A. Gurnett, D. Pitonak, C. Fowler, D.J. Andrews, and L. Andersson
J. Geophys. Res. Planets, 124, 1, 76-93, doi:10.1029/2018JE005849 |
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Ions Accelerated by Sounder-Plasma Interaction as Observed by Mars Express
A. Voshchepynets, S. Barabash, R. Ramstad, M. Holmstrom, D. Andrews, G. Nicolaou, R. Frahm, A.J. Kopf, and D.A. Gurnett
J. Geophys. Res. Space Physics, 123, 9802-9814, doi:10.1029/2018JA025889 |
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MARSIS Observations of Field-Aligned Irregularities and Ducted Radio Propagation in the Martian Ionosphere
D.J. Andrews, H.J. Opgenoorth, T.B. Leyser, S. Buchert, N.J.T. Edberg, D.D. Morgan, D.A. Gurnett, A.J. Kopf, K. Fallows, and P. Withers
J. Geophys. Res. Space Physics, 123, 6251-6263, doi:10.1029/2018JA025663 |
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Mars Initial Reference Ionosphere (MIRI) Model: Updates and Validations Using MAVEN, MEX, and MRO Data Sets
M. Mendillo, C. Narvaez, J. Trovato, P. Withers, M. Mayyasi, D.D. Morgan, A.J. Kopf, D.A. Gurnett, F. Nemec, and B. Campbell
J. Geophys. Res. Space Physics, 123, 5674-5683, doi:10.1029/2018JA025263 |
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MARSIS Observations of the Martian Nightside Ionosphere During the September 2017 Solar Event
Y. Harada, D.A. Gurnett, A.J. Kopf, J.S. Halekas, S. Ruhunusiri, G.A. DiBraccio, J. Espley, and D.A. Brain
Geophys. Res. Lett., 45, 7960-7967, doi:10.1002/2018GL077622. |
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Shapes of Magnetically Controlled Electron Density Structures in the Dayside Martian Ionosphere
C. Dieval, A.J. Kopf, and J.A. Wild
J. Geophys. Res. Space Physics, 123, 3919-3942, doi:10.1002/2017JA025140 |
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Ionospheric Irregularities at Mars Probed by MARSIS Topside Sounding
Y. Harada, D.A. Gurnett, A.J. Kopf, J.S. Halekas, and S. Ruhunusiri
J. Geophys. Res. Space Physics, 123, 1, 1018-1030,
doi:10.1002/2017JA024913 |
2017
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Ionospheric Electron Densities at Mars: Comparison of Mars Express
Ionospheric Sounding and MAVEN Local Measurements
F. Nemec, D.D. Morgan, C. Fowler, A.J. Kopf, L. Andersson, D.A.
Gurnett, D. Andrews, and V. Truhlik
J. Geophys. Res. Space Physics, 122, 12, 12393-12405,
doi:10.1002/2017JA024629 |
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Dynamic Response of the Martian Ionosphere to an Interplanetary
Shock: Mars Express and MAVEN Observations
Y. Harada, D.A. Gurnett, A.J. Kopf, J.S. Halekas, S. Ruhunusiri,
C.O. Lee, T. Hara, J. Espley, G.A. DiBraccio, D.L. Mitchell, C. Mazelle,
D.E. Larson, and B.M. Jakosky
Geophys. Res. Lett., 44, 18, 9116-9123,
doi:10.1002/2017GL074897 |
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The Transient Topside Layer and Associated Current Sheet in the
Ionosphere of Mars
A.J. Kopf, D.A. Gurnett, G.A. DiBraccio, D.D. Morgan, and J.S. Halekas
J. Geophys. Res. Space Physics, 122, 5, 5579-5590, doi:10.1002/2016JA023591 |
2015
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An Ionized Layer in the Upper Atmosphere of Mars Caused by Dust Impacts from Comet Siding Spring
D.A. Gurnett, D.D. Morgan, A.M. Persoon, L.J. Granroth, A.J. Kopf, J.J. Plaut, and J.L. Green
Geophys. Res. Lett., 42, 4745-4751, doi:10.1002/2015GL063726 |
2010
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A Multi-Instrument Study of Auroral Hiss at Saturn
Andrew James Kopf
Ph.D. Thesis, Dept. of Physics and Astronomy, University
of Iowa, Iowa City, Iowa |
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A Plasmapause-like Density Boundary at High Latitudes in Saturn's
Magnetosphere
D.A. Gurnett, A.M. Persoon, A.J. Kopf, W.S. Kurth,
M.W. Morooka, J.-E. Wahlund, K.K. Khurana, M.K. Dougherty, D.G. Mitchell, S.M. Krimigis, and N. Krupp
Geophys. Res. Lett., 37, L16806,
doi:10.1029/2010GL044466 |
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Electron Beams as the Source of Whistler-Mode Auroral Hiss at Saturn
A.J. Kopf, D.A. Gurnett, J.D. Menietti, P. Schippers, C.S.
Arridge, G.B. Hospodarsky, W.S. Kurth, S. Grimald, N. Andre, A.J. Coates, and M.K. Dougherty
Geophys. Res. Lett., 37, L09102, doi:10.1029/2010GL042980 |
2009
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A North-South Difference in the Rotation Rate of Auroral Hiss at Saturn: Comparison to Saturn's Kilometric Radio Emission
D.A. Gurnett, A.M. Persoon, J.B. Groene, A.J. Kopf, G.B. Hospodarsky, and W.S. Kurth
Geophys. Res. Lett., 36, L21108, doi:10.1029/2009GL040774 |
2008
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Transient Layers in the Topside Ionosphere of Mars
A.J. Kopf, D.A. Gurnett, D.D. Morgan, and D.L. Kirchner
Geophys. Res. Lett., 35, L17102, doi:10.1029/2008GL034948 |
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Transient Layers in the Topside Ionosphere of Mars
Andrew James Kopf
M.S. Thesis, Dept. of Physics and Astronomy, University of Iowa, Iowa City, Iowa |
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An Overview of Radar Soundings of the Martian Ionosphere from the Mars Express Spacecraft
D.A. Gurnett, R.L. Huff, D.D. Morgan, A.M. Persoon, T.F. Averkamp, D.L. Kirchner, F. Duru, F. Akalin, A.J. Kopf, E. Nielsen, A. Safaenili, J.J. Plaut, and G. Picardi
Adv. Space Research, 41, 1335-1346, doi:10.1016/j.asr.2007.01.062 |
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