Andrew Gerrard

Ogawa, Y., & Tanaka, Y., & Kodokura, A., & Hosokawa, K., & Ebihara, Y., & Motoba, T., & Gustavsson, B., & Brandstrom, U., & Sato, Y., & Oyama, S., & Ozaki, M., & Raita, T., & Sigernes, F., & Nozawa, S., & Shiokawa, K., & Kosh, M., & Kauristie, K., & Hall, C., & Suzuki, S., & Miyoshi, Y., & Gerrard, Andrew J., & Miyaoka, H., & Fujii, R. (2020). Development of low-cost multi-wavelength imager system for studies of aurora and airglow. Polar Science, 23,

Yue, C., & Bortnik, Jacob, & Li, W., & Wang, C.-P., & Thorne, R. M., & Lyons, L., & Reeves, G. D., & Spence, H. E., & Gerrard, Andrew J., & Gkioulidou, M., & Mitchell, D. G. (2019). Oxygen Ion Dynamics in the Earth's Ring Current: Van Allen Probes Observations. Journal of Geophysical Research: Space Physics, 124(10),

Hull, A., & Chaston, C., & Bonnell, J., & Wygant, J., & Kletzing, C., & Reeves, G., & Gerrard, Andrew J. (2019). Dispersive Alfvén Wave Control of O+ Ion Outflow and Energy Densities in the Inner Magnetosphere. Geophysical Research Letters, 46(15), 8597-8606.

Wang, B., & Nishimura, Y., & Zhang, H., & Shen, X.-C., & Lyons, L., & Angelopoulos, V., & Ebihara, Y., & Weatherwax, A., & Gerrard, Andrew J., & Frey, H. (2019). The 2-D Structure of Foreshock-Driven Field Line Resonances Observed by THEMIS Satellite and Ground-Based Imager Conjunctions. Journal of Geophysical Research: Space Physics, 124(8), 6792-6811.

Kuzichev, I., & Soto-Chavez, A., & Park, J., & Gerrard, Andrew J., & Spitkovsky, A. (2019). Magnetospheric chorus wave simulation with the TRISTAN-MP PIC code. Physics of Plasmas, 26(7),

Soto-Chavez, A., & Lanzerotti, L., & Manweiler, J., & Gerrard, Andrew J., & Cohen, R., & Xia, Z., & Chen, L., & Kim, H. (2019). Observational evidence of the drift-mirror plasma instability in Earth's inner magnetosphere. Physics of Plasmas, 26(4),

Yue, C., & Jun, C.-W., & Bortnik, J., & An, X., & Ma, Q., & Reeves, G., & Spence, H., & Gerrard, Andrew J., & Gkioulidou, M., & Gkioulidou, M., & Mitchell, D., & Kletzing, C. (2019). The Relationship Between EMIC Wave Properties and Proton Distributions Based on Van Allen Probes Observations. Geophysical Research Letters, 46, 4070-4078.

Soto-Chavez, A. R., & Lanzerotti, Louis J, & Manweiler, J. W., & Gerrard, Andrew J., & Cohen, R., & Xia, Z., & Chen, L., & Kim, Hyomin (2019). Observational evidence of the drift-mirror plasma instability in Earth's inner magnetosphere. Physics of Plasmas, 26(4),

Frissell, N., & Vega, J., & Markowitz, E., & Gerrard, Andrew J., & Engelke, W., & Erickson, P., & Miller, E., & Luetzelschwab, R., & Bortnik, J. (2019). High-Frequency Communications Response to Solar Activity in September 2017 as Observed by Amateur Radio Networks. Space Weather, 17, 118-132.

Motoba, T., & Ebihara, Y., & Ogawa, Y., & Kadokura, A., & Engebretson, M., & Angelopoulos, V., & Gerrard, Andrew J., & Weatherwax, A. (2019). On the Driver of Daytime Pc3 Auroral Pulsations. Geophysical Research Letters, 46, 553-561.

Yue, C., & Bortnik, J., & Li, W., & Ma, Q., & Gkioulidou, M., & Reeves, G., & Wang, C.-P., & Thorne, R. , & Lui, A., & Gerrard, Andrew J., & Spence, H., & Mitchell, D. (2018). The Composition of Plasma inside Geostationary Orbit Based on Van Allen Probes Observations. Journal of Geophysical Research: Space Physics, 123, 6478-6493.

Khadka, S., & Valladares, C., & Sheehan, R., & Gerrard, Andrew J. (2018). Effects of Electric Field and Neutral Wind on the Asymmetry of Equatorial Ionization Anomaly. Radio Science, 53, 683-698.

Frissell, N., & Katz, J., & Gunning, S., & Vega, J., & Gerrard, Andrew J., & Earle, G., & Moses, M., & West, M., & Huba, J., & Erickson, P., & Miller, E., & Gerzoff, R., & Liles, W., & Silver, H. (2018). Modeling Amateur Radio Soundings of the Ionospheric Response to the 2017 Great American Eclipse. Geophysical Research Letters, 45, 4665-4674.

Kim, H., & Gerrard, Andrew J., & Lanzerotti, L., & Soto-Chavez, A., & Cohen, R., & Manweiler, J. (2017). Ring Current He Ion Control by Bounce Resonant ULF Waves. Journal of Geophysical Research: Space Physics, 122(12), 12301-12039.

Kim, Hyomin, & Gerrard, Andrew J., & Lanzerotti, Louis J, & Soto-Chavez, Rualdo, & Cohen, Ross J., & Manweiler, Jerry W. (2017). Ring Current He Ion Control by Bounce Resonant ULF Waves. Journal of Geophysical Research: Space Physics, 122(12), 12031-12039.

Cohen, I., & Mitchell, D., & Kistler, L., & Mauk, B., & Anderson, B., & Westlake, J., & Ontani, S., & Hamilton, D., & Turner, D., & Blake, B., & Fennell, J., & Jaynes, A., & Leonard, T., & Gerrard, Andrew J., & Lanzerotti, L., & Allen, R., & Burch, J. (2017). Dominance of high-energy (>150 keV) heavy ion intensities in Earth's middle to outer magnetosphere. Journal of Geophysical Research: Space Physics, 122(9), 9282-9293.

Yue, C., & Bortnik, J., & Thorne, R., & Ma, Q., & An, X., & Chappell, C., & Gerrard, Andrew J., & Lanzerotti, L., & Shi, Q., & Reeves, G., & Spence, H., & Mitchell, D., & Gkioulidou, M., & Kletzing, C. (2017). The characteristic pitch angle distributions of 1 eV to 600 keV protons near the equator based on Van Allen Probes observations. Journal of Geophysical Research: Space Physics, 122, 9464-9473.

Cohen, Ian J., & Mitchell, Donald G., & Kistler, Lynn M., & Mauk, Barry H., & Anderson, Brian J., & Westlake, Joseph H., & Ohtani, Shinichi, & Hamilton, Douglas C., & Turner, Drew L., & Blake, J. Bernard, & Fennell, Joseph F., & Jaynes, Allison N., & Leonard, Trevor W., & Gerrard, Andrew J., & Lanzerotti, Louis J, & Allen, Robert C., & Burch, James L. (2017). Dominance of high-energy (>150 keV) heavy ion intensities in Earth's middle to outer magnetosphere. Journal of Geophysical Research: Space Physics, 122(9), 9282-9293.

Yue, Chao, & Bortnik, Jacob, & Thorne, Richard M., & Ma, Qianli, & An, Xin, & Chappell, C. R., & Gerrard, Andrew J., & Lanzerotti, Louis J, & Shi, Quanqi, & Reeves, Geoffrey D., & Spence, Harlan E., & Mitchell, Donald G., & Gkioulidou, Matina, & Kletzing, Craig A. (2017). The Characteristic Pitch Angle Distributions of 1 eV to 600 keV Protons Near the Equator Based On Van Allen Probes Observations. Journal of Geophysical Research: Space Physics, 122(9), 9464-9473.

Cohen, R., & Gerrard, Andrew J., & Soto-Chavez, A. R., & Kim, H., & Manweiler, J. (2017). Climatology of high-β plasma measurements in Earth's inner magnetosphere. J. Geophys. Res. Space Physics, 122, 711-726.

Kim, Hyomin, & Clauer, C. R., & Gerrard, Andrew J., & Engebretson, M., & Hartinger, M., & Lessard, M., & Matzka, J., & Sibeck, D., & Singer, H., & Stolle, C., & Weimer, D., & Xu, Z. (2017). Conjugate observations of electromagnetic ion cyclotron waves associated with traveling convection vortex events. J. Geophys. Res. Space Physics, 122, 7336-7352.

Mehta, D., & Gerrard, Andrew J., & Ebihara, Y., & Weatherwax, A., & Lanzerotti, L. (2017). Short-period mesospheric gravity waves and their sources at the South Pole. Atmospheric Chemistry and Physics, 17, 911-919.

Mehta, Dhvanit, & Gerrard, Andrew J., & Ebihara, Yusuke, & Weatherwax, Allan T., & Lanzerotti, Louis J (2017). Short-period mesospheric gravity waves and their sources at the South Pole. Atmospheric Chemistry and Physics, 17(2), 911-919.

Cohen, Ross, & Gerrard, Andrew J., & Lanzerotti, Louis J, & Soto-Chavez, A. R., & Kim, Hyomin, & Manweiler, Jerry W. (2017). Climatology of high-β plasma measurements in Earth's inner magnetosphere. Journal of Geophysical Research: Space Physics, 122(1), 711-726.

Motoba, T., & Ebihara, Y., & Kadokura, A., & Engebretson, M., & Lessard, M., & Weatherwax, A., & Gerrard, Andrew J. (2016). Fast-moving diffuse auroral patches: A new aspect of daytime Pc3 auroral pulsations. J. Geophys. Res. Space Physics, 122, 1542-1554.

Soto-Chavez, A., & Lanzerotti, L., & Gerrard, Andrew J., & Kim, H., & Bortnik, J., & Manweiler, J. (2016). RBSPICE measurement of ion loss during the 2015 March storm: Adiabatic response to the geomagnetic field change. Journal of Geophysical Research-Space, 121, 9547-9559.

Soto-Chavez, A. R., & Lanzerotti, Louis J, & Gerrard, Andrew J., & Kim, Hyomin, & Bortnik, J., & Manweiler, J. W. (2016). RBSPICE measurement of ion loss during the 2015 March storm: Adiabatic response to the geomagnetic field change. Journal of Geophysical Research A: Space Physics, 121(10), 9547-9559.

Urban, K., & Gerrard, Andrew J., & Lanzerotti, L., & Weatherwax, A. (2016). Rethinking the polar cap: Eccentric dipole structuring of ULF power at the highest corrected geomagnetic latitudes. Journal of Geophysical Research-Space, 121,

Urban, Kevin D., & Gerrard, Andrew J., & Lanzerotti, Louis J, & Weatherwax, Allan T. (2016). Rethinking the polar cap: Eccentric dipole structuring of ULF power at the highest corrected geomagnetic latitudes. Journal of Geophysical Research: Space Physics, 121(9), 8475-8507.

Mehta, D., & Gerrard, Andrew J., & Ebihara, Y., & Weatherwax, A., & Lanzerotti, L. (2016). Mesospheric gravity waves and their sources at the South Pole. Atmospheric Chemistry and Physics Discussions,

Frissell, N., & Baker, J., & Ruohoniemi, J., & Greenwald, R., & Gerrard, Andrew J., & Miller, E., & West, M.-L. (2016). Sources and characteristics of medium-scale traveling ionospheric disturbances observed by high-frequency radars in the North American sector. Journal of Geophysical Research-Space, 121,

Chaston, C. C., & Bonnell, J. W., & Wygant, J. R., & Kletzing, C. A., & Reeves, G. D., & Gerrard, Andrew J., & Lanzerotti, Louis J, & Smith, C. W. (2015). Extreme ionospheric ion energization and electron heating in Alfvén waves in the storm time inner magnetosphere. Geophysical Research Letters, 42(24), 10531-10540.

Chaston, C., & Bonnell, J., & Wygant, J., & Kletzing, C., & Reeves, G., & Gerrard, Andrew J., & Lanzerotti, L., & Smith, C. (2015). Extreme ionospheric ion energization and electron heating in Alfvén waves in the storm-time inner magnetosphere. Geophysical Research Letters, 42(24),

Baker, D., & Jaynes, A., & Hoxie, V., & Thorne, R., & Foster, J., & Li, X., & Fennell, J., & Wygant, J., & Kanekal, S., & Erickson, P., & Kurth, W., & Li, W., & Ma, Q., & Schiller, Q., & Blum, L., & Malaspina, D., & Gerrard, Andrew J., & Lanzerotti, L. (2014). An Impenetrable Barrier to Ultra-Relativistic Electrons in the Van Allen Radiation Belt. Nature, 515, 531–534.

Gerrard, Andrew J., & Lanzerotti, L., & Gkioulidou, M., & Mitchell, D., & Manweiler, J. , & Bortnik, J., & Keika, K. (2014). Initial measurements of O-ion and He-ion decay rates observed fromthe Van Allen probes RBSPICE instrument. J. Geophys. Res: Space Physics, 119, doi: 10.1002/2014JA020374.

Frissell, N., & Baker, J., & Ruohoniemi, M., & Gerrard, Andrew J., & Miller, E., & Marini, J., & West, M., & Bristow, W. (2014). Climatology of medium-scale traveling ionospheric disturbances observed by the midlatitude Blackstone SuperDARN radar. J. Geophys. Res.: Space Physics, 119, doi:10.1002/2014JA019870.

Makela, J., & Harding, B., & Meriwether, J., & Mesquita, R., & Sanders, S., & Ridley, A., & Castellez, M., & Ciocca, M., & Earle, G., & Frissell, N., & Hampton, D., & Gerrard, Andrew J., & Noto, J., & Martinas, C. (2014). Storm time response of the midlatitude thermosphere: Observations from a network of Fabry-Perot interferometers. J. Geophys. Res.: Space Physics, 119, doi:10.1002/2014JA019832.

Melville, R., & Stillinger, A., & Gerrard, Andrew J., & Weatherwax, A. (2014). Sustainable energy at the 100-W level for scientific sites on the Antarctic Plateau: Lessons learned from the PENGUIn-AGO project. Review of Scientific Instruments, 85(4), id.045117.

Gerrard, Andrew J., & Lanzerotti, L., & Gkioulidou, M., & Mitchell, D., & Manweiler, J. , & Bortnik, J. (2014). Quiet time observations of He ions in the inner magnetosphere as observed from the RBSPICE instrument aboard the Van Allen Probes mission. Geophys. Res. Lett., 41,

Earle, G., & Davidson, R., & Heelis, R., & Coley, W., & Weimer, D., & Makela, J., & Fisher, D., & Gerrard, Andrew J., & Meriwether, J. (2013). Low latitude thermospheric responses to magnetic storms. Journal of Geophysical Research, 10.1002/jgra.50212.

Li, Z., & Naqvi, S., & Gerrard, Andrew J., & Chau, J., & Bhattacharya, Y. (2012). Numerical modeling of lower stratospheric Doppler ducted gravity waves over Jicamarca, Peru. Atmos. Chem. and Phys., 12, 11085-11093.

Urban, K., & Gerrard, Andrew J., & Bhattacharya, Y., & Ridley, A., & Lanzerotti, L., & Weatherwax, A. (2011). Quiet time observations of the open‐closed boundary prior to the CIR‐induced storm of 9 August 2008. Space Weather, 9(S11001),

Gerrard, Andrew J., & Bhattacharya, Y., & Thayer, J. (2011). Observations of in-situ generated gravity waves during a stratospheric temperature enhancement (STE) event. Atmos. Chem. Phys., 11, 11913-11917.

Gerrard, Andrew J., & Meriwether, J. (2011). Initial daytime and nighttime SOFDI observations of thermospheric winds from Fabry-Perot Doppler shift measurements of the 630-nm OI line-shape profile. Annales Geophysicae, 29, 1529–1536.

Li, Z., & Naqvi, S., & Gerrard, Andrew J., & Chau, J., & Bhattacharya, Y. (2011). Numerical modeling of lower stratospheric Doppler ducted gravity waves over Jicamarca, Peru. Atmos. Chem. and Phys. Discussions, 11, 19011-19027.

Gerrard, Andrew J., & Bhattacharya, Y., & Thayer, J. (2011). Observations of in-situ generated gravity waves during a stratospheric temperature enhancement (STE) event. Atmos. Chem. Phys. Discuss., 11, 14221-14232.

Bhattacharya, Yajnavalkya, & Gerrard, Andrew J. (2010). Wintertime mesopause region vertical winds from Resolute Bay. Journal of Geophysical Research-Atmospheres, 115(D00N07),

Gerrard, Andrew J., & Detrick, D., & Mende, S., & Lanzerotti, L., & Weatherwax, A., & Bhattacharya, Y. (2010). Photometric observations of 630.0-nm OI and 427.8-nm N2+ emission from South Pole and McMurdo Stations during winter: Analysis of temporal variations spanning minutes to hourly timescales. Journal of Geophysical Research-Space, 115(A8), 10.1029/2009JA014970.

Bhattacharya, Y., & Gerrard, Andrew J. (2010). Correlations of mesospheric winds with subtle motion of the Arctic polar vortex. Atmos. Chem. Phys., 10, 431-436.