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G. V. Khazanov, C. Gabrielse, A. Glocer, M. Chu, Y. Nishimura, and P. Reyes. A 2D Kaleidoscope of Electron Heat Fluxes Driven by Auroral Electron Precipitation. Geophysical Research Letters, volume 49, issue 18,  2022 .

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X. Meng, D. S. Ozturk, O. P. Verkhoglyadova, R. H. Varney, A. S. Reimer, J. L. Semeter, S. R. Kaeppler, and W. Zhan. Energy Deposition by Mesoscale High-Latitude Electric Fields Into the Thermosphere During the 26 October 2019 Geomagnetic Storm. Journal of Geophysical Research: Space Physics, volume 127, issue 12,  2022 .

B. Park, C. Lim, J. Wang, and Y. T. J. Morton. Horizontal Drift Velocity and Dimensions of Ionospheric Irregularities Using ROT From a GNSS Receiver Array. IEEE Transactions on Geoscience and Remote Sensing, volume 60,  2022 .

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E. R. Sanchez, Q. Ma, W. Xu, R. A. Marshall, J. Bortnik, P. Reyes, R. Varney, and S. Kaeppler. A Test of Energetic Particle Precipitation Models Using Simultaneous Incoherent Scatter Radar and Van Allen Probes Observations. Journal of Geophysical Research: Space Physics, volume 127, issue 8,  2022 .

Z. Wang and S. Zou. COMPASS: A New COnductance Model Based on PFISR And SWARM Satellite Observations. Space Weather, volume 20, issue 2,  2022 .

Y. Wang, D. R. Themens, C. Wang, Y.-Z. Ma, A. Reimer, R. Varney, R. Gilies, Z.-Y. Xing, Q.-H. Zhang, and P. T. Jayachandran. Simultaneous Observations of a Polar Cap Sporadic-E Layer by Twin Incoherent Scatter Radars at Resolute. Journal of Geophysical Research: Space Physics, volume 127, issue 6,  2022 .

H. Wu and X. Lu. Data Assimilation of High-Latitude Electric Fields: Extension of a Multi-Resolution Gaussian Process Model (Lattice Kriging) to Vector Fields. Space Weather, volume 20, issue 1,  2022 .

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W. Zhu, J. Chen, Q. Sun, Z. Li, W. Tan, and Y. Wei. Reconstructing of High-Spatial-Resolution Three-Dimensional Electron Density by Ingesting SAR-Derived VTEC Into IRI Model. IEEE Geoscience and Remote Sensing Letters, volume 19,  2022 .

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L. J. Lamarche, R. H. Varney, and A. S. Reimer. Ion Heating in the Polar Cap Under Northwards IMF Bz. Journal of Geophysical Research: Space Physics, volume 126, issue 11, October  2021 .

L. R. Lyons, J. Liu, Y. Nishimura, C.-P. Wang, A. S. Reimer, W. A. Bristow, D. L. Hampton, X. Shi, R. H. Varney, and E. F. Donovan. Radar Observations of Flows Leading to Longitudinal Expansion of Substorm Onset over Alaska. Journal of Geophysical Research: Space Physics,  2021 .

Y.-Z. Ma, Q.-H. Zhang, L. R. Lyons, J. Liu, Z.-Y. Xing, A. Reimer, Y. Nishimura, and D. Hampton. Is Westward Travelling Surge Driven by the Polar Cap Flow Channels? Journal of Geophysical Research: Space Physics, volume 126, issue 8,  2021 .

R. A. Makarevich, G. Crowley, I. Azeem, C. Ngwira, and V. V. Forsythe. Auroral E-Region as a Source Region for Ionospheric Scintillation. Journal of Geophysical Research: Space Physics, volume 126, issue 5, May  2021 .

R. L. Mesquita. An observational investigation of mid-latitude thermospheric temperatures and high-latitude E-region neutral wind structures. May, Clemson University  2021 .

J.-P. St-Maurice and L. Goodwin. Revisiting the Behavior of the E-Region Electron Temperature During Strong Electric Field Events at High Latitudes. Journal of Geophysical Research: Space Physics, volume 126, issue 2,  2021 .

Y. Wang, P. T. Jayachandran, D. R. Themens, A. M. McCaffrey, Q.-H. Zhang, S. David, and R. Chadwick. A Case Study of Polar Cap Sporadic-E Layer Associated with TEC Variations. Remote Sensing, volume 13, issue 7,  2021 .

W. Zhan, S. R. Kaeppler, M. F. Larsen, A. Reimer, and R. Varney. An Investigation of Auroral E Region Energy Exchange Using Poker Flat Incoherent Scatter Radar Observations During Fall Equinox Conditions. Journal of Geophysical Research: Space Physics, volume 126, issue 10,  2021 .

Y. Zou, L. Lyons, M. Conde, R. Varney, V. Angelopoulos, and S. Mende. Effects of Substorms on High-Latitude Upper Thermospheric Winds. Journal of Geophysical Research: Space Physics, volume 126, issue 1,  2021 .

S. Zou, J. Ren, Z. Wang, H. Sun, and Y. Chen. Impact of Storm-Enhanced Density (SED) on Ion Upflow Fluxes During Geomagnetic Storm. Frontiers in Astronomy and Space Sciences, volume 8,  2021 .

A. C. Burnett and J. LaBelle. Estimating Polar Cap Density and Medium-Frequency Burst Source Heights Using 2fce Roar Radio Emissions. Journal of Geophysical Research: Space Physics, volume 125, issue 10,  2020 .

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M. Fraunberger, K. A. Lynch, R. Clayton, T. M. Roberts, D. Hysell, M. Lessard, A. Reimer, and R. Varney. Auroral ionospheric plasma flow extraction using subsonic retarding potential analyzers. Review of Scientific Instruments, volume 91, issue 9,  2020 .

K. Hosokawa, A. Kullen, S. Milan, J. Reidy, Y. Zou, H. U. Frey, R. Maggiolo, and R. Fear. Aurora in the Polar Cap: A Review. Space Science Review, volume 216, issue 15,  2020 .

A. Hu, B. Carter, J. Currie, R. Norman, S. Wu, and K. Zhang. A Deep Neural Network Model of Global Topside Electron Temperature Using Incoherent Scatter Radars and Its Application to GNSS Radio Occultation. Journal of Geophysical Research: Space Physics, volume 125, issue 2,  2020 .

C. Jin, J. J. Hyun, C. Eun-Jung, Y. Jiwoong, C. Byung-Kyu, K. Myung-Jin, Y. Hong-Suh, R. Dong-Goo, K. Sooyoung, P. Jang-Hyun, and C. Sungki. Space Surveillance Radar Observation Analysis: One-Year Tracking and Orbit Determination Results of KITSAT-1, "우리별 1호. Journal of Astronomy and Space Sciences, The Korean Space Science Society, volume 37, issue 2,  2020 .

S. R. Kaeppler, E. Sanchez, R. H. Varney, R. J. Irvin, R. A. Marshall, J. Bortnik, A. S. Reimer, and P. M. Reyes. Chapter 6 - Incoherent scatter radar observations of 10–100keV precipitation: review and outlook. The Dynamic Loss of Earth's Radiation Belts, Elsevier,  2020 .

Kenward and David. The Impact of Fine Scale Drivers on Upwelling Processes. University of New Hampshire, Durham,  2020 .

A. V. Koustov, M. R. Luciuk, R. G. Gillies, S. Ullrich, B. Larson, K. A. McWilliams, and M. T. Schmidt. Velocity of SuperDARN Echoes at Intermediate Radar Ranges. Radio Science, volume 55, issue 11,  2020 .

A. V. Koustov, S. Ullrich, P. V. Ponomarenko, R. G. Gillies, D. R. Themens, and N. Nishitani. Comparison of SuperDARN peak electron density estimates based on elevation angle measurements to ionosonde and incoherent scatter radar measurements. Earth, Planets and Space, volume 72, issue 43,  2020 .

L. J. Lamarche, R. H. Varney, and C. L. Siefring. Analysis of Plasma Irregularities on a Range of Scintillation-Scales Using the Resolute Bay Incoherent Scatter Radars. Journal of Geophysical Research: Space Physics, volume 125, issue 3,  2020 .

L. J. Lamarche, R. H. Varney, and C. L. Siefring. Analysis of Plasma Irregularities on a Range of Scintillation-Scales Using the Resolute Bay Incoherent Scatter Radars. Journal of Geophysical Research: Space Physics, volume 125, issue 3,  2020 .

J. Li, T. Li, Q. Wu, Y. Tang, Z. Wu, and J. Cui. Characteristics of Small-Scale Gravity Waves in the Arctic Winter Mesosphere. Journal of Geophysical Research: Space Physics, volume 125, issue 6,  2020 .

L. R. Lyons and Y. Nishimura. Substorm onset and development: The crucial role of flow channels. Journal of Atmospheric and Solar-Terrestrial Physics, volume 211,  2020 .

M. Maimaiti. Driving Influences of Ionospheric Electrodynamics at Mid- and High-Latitudes. VTechWorks, Virginia Tech,, Virginia Polytechnic Institute and State University  2020 .

R. Michell and E. Mirizio. The statistics of small-mass meteors observed simultaneously with optical imaging and the Poker Flat Incoherent Scatter Radar. Planetary and Space Science, volume 190,  2020 .

M. Negale, J. Holmes, R. Parris, D. Ober, E. Dao, R. Kelly, J. V. Eccles, J. Hines, and T. Pedersen. Using Data Assimilation to Reconstruct High-Latitude Polar Cap Patches. Radio Science, volume 55, issue 6,  2020 .

Y. Nishimura, L. R. Lyons, C. Gabrielse, N. Sivadas, E. F. Donovan, R. H. Varney, V. Angelopoulos, J. M. Weygand, M. G. Conde, and S. R. Zhang. Extreme Magnetosphere-Ionosphere-Thermosphere Responses to the 5 April 2010 Supersubstorm. Journal of Geophysical Research: Space Physics, volume 125, issue 4,  2020 .

D. S. Ozturk, X. Meng, O. P. Verkhoglyadova, R. H. Varney, A. S. Reimer, and J. L. Semeter. A New Framework to Incorporate High-Latitude Input for Mesoscale Electrodynamics. Journal of Geophysical Research: Space Physics, volume 125, issue 1,  2020 .

J. Ren, S. Zou, E. Kendall, A. Coster, K. Sterne, and M. Ruohoniemi. Direct Observations of a Polar Cap Patch Formation Associated With Dayside Reconnection Driven Fast Flow. Journal of Geophysical Research: Space Physics, volume 125, issue 4,  2020 .

J. Ren, S. Zou, J. Lu, N. Giertych, Y. Chen, R. H. Varney, and A. S. Reimer. Statistical Study of Ion Upflow and Downflow Observed by PFISR. Journal of Geophysical Research: Space Physics, volume 125, issue 10,  2020 .

R. M. Robinson, S. R. Kaeppler, L. Zanetti, B. Anderson, S. K. Vines, H. Korth, and A. Fitzmaurice. Statistical Relations Between Auroral Electrical Conductances and Field-Aligned Currents at High Latitudes. Journal of Geophysical Research: Space Physics, volume 125, issue 7,  2020 .

J. Semeter. Chapter 15 - High-resolution approaches to ionospheric exploration. The Dynamical Ionosphere, Elsevier,  2020 .

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V. Sreenivash, Y. Su, and S. Datta-Barua. Automated Ionospheric Scattering Layer Hypothesis Generation for Detected and Classified Auroral Global Positioning System Scintillation Events. Radio Science, volume 55, issue 1,  2020 .

J.-P. St-Maurice and L. Goodwin. Revisiting the behavior of the E-region electron temperature during strong electric field events at high latitudes. Journal of Geophysical Research: Space Physics,  2020 .

D. J. Stuart. Multiyear Automated Analysis of Auroral Images to Categorize Ionosphere Irregularity Layer. Illinois Institute of Technology,, Illinois Institute of Technology  2020 .

C. Tape, A. T. Ringler, and D. L. Hampton. Recording the Aurora at Seismometers across Alaska. Seismological Research Letters, volume 91, issue 6, pages 3039-3053,  2020 .

B. Wang, Y. Nishimura, M. Hartinger, N. Sivadas, L. L. Lyons, R. H. Varney, and V. Angelopoulos. Ionospheric Modulation by Storm Time Pc5 ULF Pulsations and the Structure Detected by PFISR-THEMIS Conjunction. Geophysical Research Letters, volume 47, issue 16,  2020 .

Z. Yang, B. Zhang, J. Lei, and T. Dang. Nonlinear Response of the Cross Polar Cap Potential to Solar Wind Density Under Northward Interplanetary Magnetic Field. Geophysical Research Letters, volume 47, issue 8,  2020 .

W. Zhu, J.-Y. Chen, Q. Zhang, and J.-M. Zhang. Mapping of High-Spatial-Resolution Three-Dimensional Electron Density by Combing of Full-Polarimetric SAR and IRI Model. Frontiers in Earth Science, volume 8,  2020 .

R. Clayton, K. Lynch, M. Zettergren, M. Burleigh, M. Conde, G. Grubbs, D. Hampton, D. Hysell, M. Lessard, R. Michell, A. Reimer, T. M. Roberts, M. Samara, and R. Varney. Two-Dimensional Maps of In Situ Ionospheric Plasma Flow Data Near Auroral Arcs Using Auroral Imagery. Journal of Geophysical Research: Space Physics, volume 124, issue 4,  2019 .

M. S. Dhadly, J. T. Emmert, D. P. Drob, M. G. Conde, A. Aruliah, E. Doornbos, G. G. Shepherd, Q. Wu, J. J. Makela, R. J. Niciejewski, C. Lee, G. Jee, and A. J. Ridley. HL-TWiM Empirical Model of High-Latitude Upper Thermospheric Winds. Journal of Geophysical Research: Space Physics,  2019 .

L. V. Goodwin, Y. Nishimura, Y. Zou, K. Shiokawa, and P. T. Jayachandran. Mesoscale Convection Structures Associated With Airglow Patches Characterized Using Cluster-Imager Conjunctions. Journal of Geophysical Research: Space Physics, volume 124, issue 9,  2019 .

K. Hosokawa, Y. Zou, and Y. Nishimura. Airglow Patches in the Polar Cap Region: A Review. Space Science Reviews, volume 215, issue 8,  2019 .

A. Hu, B. Carter, J. Currie, R. Norman, S. Wu, X. Wang, and K. Zhang. Modeling of Topside Ionospheric Vertical Scale Height Based on Ionospheric Radio Occultation Measurements. Journal of Geophysical Research: Space Physics, volume 124, issue 6,  2019 .

A. Kiene, W. A. Bristow, M. G. Conde, and D. L. Hampton. High‐resolution local measurements of F region ion temperatures and Joule heating rates using SuperDARN and ground‐based optics. Journal of Geophysical Research: Space Physics, volume 124,  2019 .

T. Kodikara, B. Carter, R. Norman, and K. Zhang. Density-Temperature Synchrony in the Hydrostatic Thermosphere. Journal of Geophysical Research: Space Physics, volume 124, issue 1,  2019 .

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M. M. Lam, M. P. Freeman, C. M. Jackman, I. J. Rae, N. M. E. Kalmoni, J. K. Sandhu, and C. Forsyth. How Well Can We Estimate Pedersen Conductance From the THEMIS White-Light All-Sky Cameras? Journal of Geophysical Research: Space Physics, volume 124, issue 4,  2019 .

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J. Wang and Y. J. Morton. A Hybrid Correlation Model for the Spaced-Receiver Technique. Radio Science, volume 54, issue 3,  2019 .

Q. Wu, D. Knipp, J. Liu, W. Wang, R. Varney, R. Gillies, P. Erickson, M. Greffen, A. Reimer, I. Häggström, G. Jee, and Y.-S. Kwak. HIWIND Observation of Summer Season Polar Cap Thermospheric Winds. Journal of Geophysical Research: Space Physics, volume 124, issue 11,  2019 .

M. G. Conde, W. A. Bristow, D. L. Hampton, and J. Elliott. Multiinstrument studies of thermospheric weather above Alaska. Journal of Geophysical Research: Space Physics, American Geophysical Union, volume 123,  2018 .

V. V. Forsythe and R. A. Makarevich. Statistical analysis of the electron density gradients in the polar cap F region using the Resolute Bay Incoherent Scatter Radar North. Journal of Geophysical Research: Space Physics, volume 123,  2018 .

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J. S. Kim, K. Papathanassiou, F. Meyer, and D. Hampton. Monitoring of Auroral Activities over Fairbanks, Alaska, using SAR, PFISR and Keograms. IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, Valencia,  2018 .

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A. V. Koustov, P. V. Ponomarenko, C. J. Graf, R. G. Gillies, and D. R. Themens. Optimal F region electron density for the PolarDARN radar echo detection near the Resolute Bay zenith. Journal of Geophysical Research: Radio Science, American Geophysical Union, volume 53,  2018 .

J. Liang, E. Donovan, A. Reimer, D. Hampton, S. Zou, and R. Varney. Ionospheric electron heating associated with pulsating auroras: Joint optical and PFISR observations. Journal of Geophysical Research: Space Physics, American Geophysical Union, volume 123, pages 4430-4456,  2018 .

S. Mrak, J. Semeter, M. Hirsch, G. Starr, D. Hampton, R. H. Varney, A. S. Reimer, J. Swoboda, P. J. Erickson, F. Lind, A. J. Coster, and V. Pankratius. Field-aligned GPS scintillation: Multisensor data fusion. Journal of Geophysical Research: Space Physics, American Geophysical Union, volume 123, pages 974-992,  2018 .

M. R. Negale, M. J. Taylor, M. J. Nicolls, S. L. Vadas, K. Nielsen, and C. J. Heinselman. Seasonal propagation characteristics of MSTIDs observed at high latitudes over Central Alaska using the Poker Flat Incoherent Scatter Radar. Journal of Geophysical Research: Space Physics, American Geophysical Union, volume 123,  2018 .

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D. S. Ozturk, S. Zou, A. J. Ridley, and J. A. Slavin. Modeling study of the geospace system response to the solar wind dynamic pressure enhancement on 17 March 2015. Journal of Geophysical Research: Space Physics, American Geophysical Union, volume 123,  2018 .

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G. W. Perry and J.-P. St.-Maurice. A polar‐cap patch detection algorithm for the Advanced Modular Incoherent Scatter Radar System. Journal of Geophysical Research: Radio Science, American Geophysical Union, volume 53,  2018 .

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D. R. Themens, P. Jayachandran, and R. H. Varney. Examining the use of the NeQuick bottomside and topside parameterizations at high latitudes. Advances in Space Research, American Geophysical Union, volume 61, issue 1, pages 287-294,  2018 .

D. R. Themens, P. T. Jayachandran, D. Bilitza, P. J. Erickson, I. Haggstrom, M. V. Lyashenko, B. Reid, R. H. Varney, and L. Pustovalova. Topside electron density representations for middle and high latitudes: A topside parameterization for E-CHAIM based on the NeQuick. Journal of Geophysical Research: Space Physics, American Geophysical Union, volume 123,  2018 .

C. C. Triplett, J. Li, R. L. Collins, G. A. Lehmacher, A. Barjatya, D. C. Fritts, B. Strelnikov, F.-J. Luebken, B. Thurairajah, V. L. Harvey, D. L. Hampton, and R. H. Varney. Observations of Reduced Turbulence and Wave Activity in the Arctic Middle Atmosphere Following the January 2015 Sudden Stratospheric Warming. Journal of Geophysical Research: Atmospheres, American Geophysical Union, volume 123,  2018 .

C. Wang, L. Chen, H. Zhao, and W. Guo. Verification of high-resolution and precision TEC retrieval based on the PALSAR full-polarimetric data. Proceedings: Active and Passive Microwave Remote Sensing for Environmental Monitoring II, volume 10788,  2018 .

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C. Watson, R. B. Langley, D. R. Themens, A. W. Yau, A. D. Howarth, and P. T. Jayachandran. Enhanced Polar Outflow Probe ionospheric radio occultation measurements at high latitudes: Receiver bias estimation and comparison with ground‐based observations. Radio Science, American Geophysical Union, volume 53,  2018 .

Y. Zou, Y. Nishimura, L. Lyons, M. Conde, R. Varney, V. Angelopoulos, and S. Mende. Mesoscale F region neutral winds associated with quasi‐steady and transient nightside auroral forms. Journal of Geophysical Research: Space Physics, volume 123,  2018 .

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L. J. Lamarche and R. A. Makarevich. Radar observations of density gradients, electric fields, and plasma irregularities near polar cap patches in the context of the gradient-drift instability. J. Geophys. Res. Space Physics, American Geophysical Union,  2017 .

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D. Lin, B. Zhang, W. A. Scales, M. Wiltberger, C. R. Clauer, and Z. Xu. The role of solar wind density in cross polar cap potential saturation under northward interplanetary magnetic field. Geophysical Research Letters, American Geophysical Union, volume 44, pages 11729-11734,  2017 .

D. C. Loucks. Impact of High-Latitude Ionospheric E Region Enhancements on Global Positioning System Scintillations in the Alaskan Sector. PhD Thesis, Aerospace Engineering Sciences Graduate Theses & Dissertations,  2017 .

D. Loucks, S. Palo, M. Pilinski, G. Crowley, I. Azeem, and D. Hampton. High-latitude GPS Phase Scintillation from E Region Electron Density Gradients During the December 20-21, 2015 Geomagnetic Storm. J. Geophys. Res., American Geophysical Union,  2017 .

M. M. J. Ruohoniemi, J. Baker, C. Clauer, M. Nicolls, and M. Hairston. RISR-N observations of the IMF By influence on reverse convection during extreme northward IMF. J. Geophys. Res. Space Physics, issue 122,  2017 .

J. Semeter, S. Mrak, M. Hirsch, J. Swoboda, H. Akbari, G. Starr, D. Hampton, P. Erickson, F. Lind, A. Coster, and V. Pankratius. GPS signal corruption by the discrete Aurora: Precise measurements from the Mahali experiment. Geophysical Research Letters, American Geophysical Union, volume 44, pages 9539-9546,  2017 .

N. Sivadas, J. Semeter, Y. Nishimura, and A. Kero. Simultaneous measurements of substorm-related electron energization in the ionosphere and the plasma sheet. Journal of Geophysical Research: Space Physics, American Geophysical Union, volume 122, pages 10528-10547, October  2017 .

Y. Su. Kilometer-Spaced GNSS Array for Ionospheric Irregularity Monitoring. PhD Thesis, Illinois Institute of Technology,  2017 .

Y. Su, S. Datta-Barua, G. S. Bust, and K. B. Deshpande. Distributed sensing of ionospheric irregularities with a GNSS receiver array. Radio Science, American Geophysical Union, volume 52, pages 988-1003,  2017 .

J. P. Swoboda. Space-time sampling strategies for electronically steerable incoherent scatter radar. PhD Thesis, Boston University,  2017 .

J. Wang and Y. T. Morton. A comparative study of ionospheric irregularity drift velocity derived from a GNSS receiver array and Poker Flat Incoherent Scatter Radar measurements during high-latitude ionospheric scintillation. J. Geophys. Res. Space Physics, American Geophysical Union, volume 122, pages 6858-6881,  2017 .

Q. Wu, G. Jee, C. Lee, J.-H. Kim, Y. H. Kim, W. Ward, and R. H. Varney. First simultaneous multistation observations of the polar cap thermospheric winds. J. Geophys. Res. Space Physics, American Geophysical Union, volume 122,  2017 .

Y. Zou, Y. Nishimura, L. R. Lyons, and K. Shiokawa. Localized polar cap precipitation in association with nonstorm time airglow patches. Geophysical Research Letters, American Geophysical Union, volume 44, pages 609-617,  2017 .

S. Zou, D. Ozturk, R. Varney, and A. Reimer. Effects of sudden commencement on the ionosphere: PFISR observations and global MHD simulation. Geophys. Res. Lett., issue 44,  2017 .

S. Zou, A. Ridley, X. Jia, E. Boyd, M. Nicolls, A. Coster, E. Thomas, and J. M. Ruohoniemi. PFISR observation of intense ion upflow fluxes associated with an SED during the 1 June 2013 geomagnetic storm. J. Geophys. Res. Space Physics, American Geophysical Union, issue 122,  2017 .

H. W. Bourne. An Algorithm for Accurate Ionospheric Total Electron Content and Receiver Bias Estimation using GPS Measurements. Master's Thesis, Colorado State University,  2016 .

W. A. Bristow, D. L. Hampton, and A. Otto. High-spatial-resolution velocity measurements derived using Local Divergence-Free Fitting of SuperDARN observations. J. Geophys. Res. Space Physics, American Geophysical Union, issue 121,  2016 .

C. R. Clauer, Z. Xu, M. Maimaiti, J. M. Ruohoniemi, W. Scales, M. D. Hartinger, M. J. Nicolls, S. Kaeppler, F. D. Wilder, and R. E. Lopez. Investigation of a rare event where the polar ionospheric reverse convection potential does not saturate during a period of extreme northward IMF solar wind driving. J. Geophys. Res. Space Physics, volume 121,  2016 .

R. B. Cosgrove. Does a localized plasma disturbance in the ionosphere evolve to electrostatic equilibrium? Evidence to the contrary. J. Geophys. Res. Space Physics, American Geophysical Union, issue 121,  2016 .

P. A. Fernandes, K. A. Lynch, M. Zettergren, D. L. Hampton, T. A. Bekkeng, I. J. Cohen, M. Conde, L. E. Fisher, P. Horak, M. R. Lessard, R. J. Miceli, R. G. Michell, J. I. Moen, and S. P. Powell. Measuring the seeds of ion outflow: Auroral sounding rocket observations of low-altitude ion heating and circulation. J. Geophys. Res., volume 121, pages 1587-1607,  2016 .

R. G. Gillies, A. van Eyken, E. Spanswick, M. Nicolls, J. Kelly, M. Greffen, D. Knudsen, M. Connors, M. Schutzer, T. Valentic, M. Malone, J. Buonocore, J.-P. St.-Maurice, and E. Donovan. First observations from the RISR-C incoherent scatter radar. Radio Science, American Geophysical Union, volume 51,  2016 .

G. I. I. Grubbs, R. Michell, M. Samara, D. Hampton, and J.-M. Jahn. A synthesis of star calibration techniques for ground-based narrowband EMCCD imagers used in Auroral Photometry. J. Geophys. Res. Space Physics, American Geophysical Union, issue 121,  2016 .

A. V. Koustov, D. B. Lavoie, and R. H. Varney. On the consistency of the SuperDARN radar velocity and E×B plasma drift. Radio Science, American Geophysical Union, issue 51,  2016 .

J. Li. Radar Studies of Turbulence and Lidar Studies of The Nickel Layers in The Arctic Mesosphere. Master's Thesis, University of Alaska Fairbanks,  2016 .

L. R. Lyons, B. Gallardo-Lacourt, S. Zou, J. M. Weygand, Y. Nishimura, W. Li, M. Gkioulidou, V. Angelopoulos, E. F. Donovan, J. M. Ruohoniemi, B. J. Anderson, S. G. Shepherd, and N. Nishitani. The 17 March 2013 storm: Synergy of observations related to electric field modes and their ionospheric and magnetospheric Effects. J. Geophys. Res. Space Physics, American Geophysical Union, issue 121,  2016 .

T. E. Moore, K. S. Brenneman, C. R. Chappell, J. H. Clemmons, G. A. Collinson, C. Cully, E. Donovan, G. D. Earle, D. J. Gershman, R. A. Heelis, L. M. Kistler, L. Kepko, G. Khazanov, D. J. Knudsen, M. Lessard, E. A. MacDonald, M. J. Nicolls, C. J. Pollock, R. Pfaff, D. E. Rowland, E. Sanchez, R. W. Schunk, J. Semeter, R. J. Stangeway, and J. Thayer. Future Atmosphere-Ionosphere-Magnetosphere Coupling Study Requirements. Magnetosphere-Ionosphere Coupling in the Solar System, American Geophysical Union, October  2016 .

Y. Shen, D. J. Knudsen, J. K. Burchill, A. Howarth, A. Yau, R. J. Redmon, D. M. Miles, R. H. Varney, and M. J. Nicolls. Strong ambipolar-driven ion upflow within the cleft ion fountain during low geomagnetic activity. J. Geophys. Res. Space Physics, issue 121,  2016 .

Y. Yamazaki, M. Kosch, Y. Ogawa, and D. Themens. High-latitude ion temperature climatology during the International Polar Year 2007–2008. J. Space Weather Space Clim., volume 6,  2016 .

C. Yue, W. Li, Y. Nishimura, Q. Zong, Q. Ma, J. Bortnik, R. M. Thorne, G. D. Reeves, H. E. Spence, C. A. Kletzing, J. R. Wygant, and M. J. Nicolls. Rapid enhancement of low-energy (<100  eV) ion flux in response to interplanetary shocks based on two Van Allen Probes case studies: Implications for source regions and heating mechanisms. J. Geophys. Res. Space Physics, issue 121,  2016 .

S.-R. Zhang, J. M. Holt, P. J. Erickson, L. P. Goncharenko, M. J. Nicolls, M. McCready, and J. Kelly. Ionospheric ion temperature climate and upper atmospheric long-term cooling. J. Geophys. Res. Space Physics, American Geophysical Union, issue 121,  2016 .

Y. Zou, Y. Nishimura, J. K. Burchill, D. J. Knudsen, L. R. Lyons, K. Shiokawa, S. Buchert, S. Chen, M. J. Nicolls, M. J. Ruohoniemi, K. A. McWilliams, and N. Nishitani. Localized field-aligned currents in the polar cap associated with airglow patches. J. Geophys. Res. Space Physics, American Geophysical Union, issue 121,  2016 .

H. Akbari, J. L. Semeter, M. A. Hirsch, P. Guio, and M. J. Nicolls. Evidence for generation of unstable suprathermal electron population in the auroral F-region. Geophys. Res. Lett., Geophys. Res. Lett., volume 42, pages 185-192,  2015 .

S. Datta-Barua, Y. Su, K. Deshpande, D. Miladinovich, G. S. Bust, D. Hampton, and G. Crowley. First light from a kilometer-baseline Scintillation Auroral GPS Array. Geophys. Res. Lett., volume 42, pages 3639-3646,  2015 .

C. Goenka, J. Semeter, J. Noto, J. Baumgardner, J. Riccobono, M. Migliozzi, H. Dahlgren, R. Marshall, S. Kapali, M. Hirsch, D. Hampton, and H. Akbari. LiCHI - Liquid Crystal Hyperspectral Imager for simultaneous multispectral imaging in aeronomy. Opt. Express, volume 23, pages 17772-17782,  2015 .

D. A. Hickey, C. R. Martinis, F. S. Rodrigues, R. H. Varney, M. A. Milla, M. J. Nicolls, A. Strømme, and J. F. Arratia. Concurrent observations at the magnetic equator of small-scale irregularities and large-scale depletions associated with equatorial spread F. J. Geophys. Res., volume 120, pages 10883-10896,  2015 .

S. R. Kaeppler, D. L. Hampton, M. J. Nicolls, A. Strømme, S. C. Solomon, J. H. Hecht, and M. G. Conde. An investigation comparing ground-based techniques that quantify auroral electron flux and conductance. J. Geophys. Res. Space Physics, volume 120, pages 9038-9056,  2015 .

L. J. Lamarche and R. A. Makarevich. Solar control of F region radar backscatter: Further insights from observations in the southern polar cap. J. Geophys. Res., volume 120,  2015 .

J. Liu, T. Nakamura, L. Liu, W. Wang, N. Balan, T. Nishiyama, M. R. Hairston, and E. G. Thomas. Formation of polar ionospheric tongue of ionization during minor geomagnetic disturbed conditions. J. Geophys. Res., volume 120, issue 8, pages 6860-6873,  2015 .

L. R. Liuzzo, A. J. Ridley, N. J. Perlongo, E. J. Mitchell, M. Conde, D. L. Hampton, W. A. Bristow, and M. J. Nicolls. High-latitude ionospheric drivers and their effects on wind patterns in the thermosphere. J. Geophys. Res., volume 120, pages 715-735,  2015 .

K. A. Lynch, D. L. Hampton, M. Zettergren, T. A. Bekkeng, M. Conde, P. A. Fernandes, P. Horak, M. Lessard, R. Miceli, R. Michell, J. Moen, M. Nicolls, S. P. Powell, and M. Samara. MICA sounding rocket observations of conductivity-gradient-generated auroral ionospheric responses: Small-scale structure with large-scale drivers. J. Geophys. Res. Space Physics, volume 120, pages 9661-9682,  2015 .

L. R. Lyons, Y. Nishimura, B. Gallardo-Lacourt, M. J. Nicolls, S. Chen, D. L. Hampton, W. A. Bristow, J. M. Ruohoniemi, N. Nishitani, E. F. Donovan, and V. Angelopoulos. Azimuthal flow bursts in the Inner Plasma Sheet and Possible Connection with SAPS and Plasma Sheet Earthward Flow Bursts. J. Geophys. Res., volume 120, pages 5009-5021,  2015 .

L. R. Lyons, Y. Nishimura, B. Gallardo-Lacourt, Y. Zou, E. F. Donovan, S. Mende, V. Angelopoulos, J. M. Ruohoniemi, K. A. McWilliams, D. L. Hampton, and M. J. Nicolls. Dynamics Related to Plasmasheet Flow Bursts as Revealed from the Aurora. Auroral Dynamics and Space Weather (eds. Y. Zhang and L. J. Paxton), John Wiley & Sons,  2015 .

R. A. Makarevich, L. J. Lamarche, and M. J. Nicolls. Resolute Bay Incoherent Scatter Radar observations of plasma structures in the vicinity of polar holes. J. Geophys. Res., volume 120, issue 9, pages 7970-7986,  2015 .

R. A. Makarevich and W. A. Bristow. Coordinated radar observations of plasma wave characteristics in the auroral F region. Ann. Geophys., volume 32, issue 7, pages 875-888,  2015 .

M. J. Nicolls.  Space Debris Measurements using the Advanced Modular Incoherent Scatter Radar. AMOS,  2015 .

G. W. Perry, H. Dahlgren, M. J. Nicolls, M. Zettergren, J.-P. St.-Maurice, J. L. Semeter, T. Sundberg, K. Hosokawa, K. Shiokawa, and S. Chen. Spatiotemporally resolved electrodynamic properties of a Sun-aligned arc over Resolute Bay. J. Geophys. Res., volume 120, pages 9977-9987,  2015 .

G. Perry. Large scale plasma density perturbations in the polar F-region ionosphere. Ph.D. Thesis, University of Saskatchewan,  2015 .

F. S. Rodrigues., M. J. Nicolls, M. A. Milla, J. M. Smith, R. H. Varney, A. Strømme, C. Martinis, and J. F. Arratia. AMISR-14: Observations of equatorial spread F. Geophys. Res. Lett., volume 42, pages 5100-5108,  2015 .

D. R. Themens, P. T. Jayachandran, and R. B. Langley. The nature of GPS differential receiver bias variability: An examination in the polar cap region. J. Geophys. Res., volume 120, pages 8155-8175,  2015 .

H. Akbari and J. L. Semeter. Aspect angle dependence of naturally enhanced ion acoustic lines. J. Geophys. Res., volume 119,  2014 .

H. Bahcivan, J. W. Cutler, J. C. Springmann, R. Doe, and M. J. Nicolls. Magnetic aspect sensitivity of high-latitude E region irregularities measured by the RAX CubeSat. J. Geophys. Res., volume 119, pages 1233-1249,  2014 .

M. Broughton. Ground and Space Observations of Auroral Medium Frequency Radio Emissions. Ph.D. Thesis, Dartmouth College,  2014 .

H. Dahlgren, G. Perry, J.-P. St.-Maurice, T. Sundberg, K. Hosokawa, J. L. Semeter, M. J. Nicolls, and K. Shiokawa. 3D imaging reveals electrodynamics of polar cap aurora. Astronomy & Geophysics, volume 55,  2014 .

L. Goodwin, J.-P. St.-Maurice, P. Richards, M. Hairston, and M. Nicolls. F region dusk ion temperature spikes at the equatorward edge of the high latitude convection pattern. Geophys. Res. Lett., volume 41, pages 300-307,  2014 .

K. Gudivada. Detection of F-region electron density irregularities using incoherent-scatter radar. Master's Thesis, University of Alaska Fairbanks,  2014 .

K. Hosokawa, S. Taguchi, K. Shiokawa, Y. Otsuka, Y. Ogawa, and M. Nicolls. Global imaging of polar cap patches with dual airglow imagers. Geophys. Res. Lett., volume 41, pages 1-6,  2014 .

D. Janches, N. Swarnalingam, J. Plane, D. Nesvorny, W. Feng, D. Vokrouhlicky, and M. Nicolls. Radar detectability studies of slow and small Zodiacal Dust Cloud Particles: II. A study of three radars with dierent sensitivity. The Astrophysical Journal, volume 796, issue 41,  2014 .

S. R. Kaeppler, M. J. Nicolls, A. Strømme, C. A. Kletzing, and S. R. Bounds. Observations in the E-region ionosphere of kappa distribution functions associated with precipitating auroral electrons and discrete aurorae. J. Geophys. Res., volume 119, pages 10164-10183,  2014 .

M. J. Nicolls, H. Bahcivan, I. Haggstrom, and M. Rietveld. Direct Measurement of Lower-Thermospheric Neutral Density using Multi-Frequency Incoherent Scattering. Geophys. Res. Lett., volume 41, issue 2, pages 8147-8154,  2014 .

M. J. Nicolls, R. Cosgrove, and H. Bahcivan. Estimating the vector electric field using monostatic, multibeam incoherent scatter radar measurements. Radio Sci., volume 49, pages 1124-1139,  2014 .

Y. Nishimura, L. R. Lyons, M. J. Nicolls, D. L. Hampton, R. G. Michell, M. Samara, W. A. Bristow, E. F. Donovan, E. Spanswick, V. Angelopoulos, and S. B. Mende. Coordinated ionospheric observations indicating coupling between pre-onset flow bursts and waves that leads to substorm onset. J. Geophys. Res., volume 119, pages 3333-3344,  2014 .

D. L. Oltrogge, P. North, and M. J. Nicolls. MULTI-PHENOMENOLOGY OBSERVATION NETWORK EVALUATION TOOL (MONET). AMOS,  2014 .

P. G. Richards, M. J. Nicolls, J.-P. St.-Maurice, L. Goodwin, and J. M. Ruohoniemi. Investigation of sudden electron density depletions observed in the dusk sector by the Poker Flat, Alaska incoherent scatter radar in summer. J. Geophys. Res., volume 119, pages 10608-10620,  2014 .

J. J. Sojka, R. W. Schunk, and M. J. Nicolls. Ionospheric Ion Temperature Forecasting in Multiples of 27 Days. Space Weather, volume 12, pages 148-160,  2014 .

D. Themens, P. Jayachandran, M. J. Nicolls, and J. W. MacDougall. A Top to Bottom Evaluation of IRI-2007 within the Polar Cap. J. Geophys. Res., volume 119,  2014 .

R. H. Varney, S. C. Solomon, and M. J. Nicolls. Heating of the sunlit polar cap ionosphere by reflected photoelectrons. J. Geophys. Res., volume 119, pages 8660-8684,  2014 .

R. L. Whittier. Poker Flat Incoherent Scatter Radar investigations of the nighttime E-region. Master's Thesis, Univ. of Alaska Fairbanks, Fairbanks, Alaska, USA,  2014 .

M. Zettergren, K. Lynch, D. Hampton, M. Nicolls, B. Wright, M. Conde, J. Moen, M. Lessard, R. Miceli, and S. Powell. Auroral ionospheric F region density cavity formation and evolution: MICA campaign results. J. Geophys. Res., volume 119, pages 3162-3178,  2014 .

S. Zou, M. B. Moldwin, A. J. Ridley, M. J. Nicolls, A. J. Coster, E. G. Thomas, and J. M. Ruohoniemi. On the generation/decay of the storm-enhanced density plumes: Role of the convection flow and field-aligned ion flow. J. Geophys. Res.,  2014 .

H. Akbari, J. L. Semeter, M. J. Nicolls, M. Broughton, and J. W. LaBelle. On the localization of auroral Langmuir turbulence in thin layers. J. Geophys. Res., volume 118, pages 3576-3583,  2013 .

C. Anderson, M. J. Kosch, M. J. Nicolls, and M. Conde. Ion-neutral coupling in Earth's thermosphere, estimated from concurrent radar and optical observations over Alaska. J. Atmos. Solar-Terr. Phys., pages 313-324,  2013 .

H. Bahcivan, M. J. Nicolls, and G. Perry. Comparison of SuperDARN irregularity drift measurements and F-region ion velocities from the Resolute Bay ISR. J. Atmos. Solar-Terr. Phys., pages 325-331,  2013 .

H. Bahcivan, S. Chen, and R. Cosgrove. Comparison of ionospheric drift and magnetic deflections on the ground. J. Atmos. Solar-Terr. Phys., pages 332-335,  2013 .

T. W. Butler. SPATIAL STATISTICS AND ANALYSIS OF EARTH'S IONOSPHERE. Ph.D. Thesis, Boston University,  2013 .

C. T. Fallen and B. J. Watkins. Diurnal and seasonal variation of electron heat flux measured with the Poker Flat Incoherent-Scatter Radar. J. Geophys. Res., volume 118, issue 8, pages 5327-5332,  2013 .

L. Goodwin. F-region Dusk Ion Temperature Spikes at the Equatorward Edge of the High Latitude Convection Region. Master's Thesis, University of Saskatchewan,  2013 .

R. A. Makarevich, A. V. Koustov, and M. J. Nicolls. Poker Flat Incoherent Scatter Radar observations of anomalous electron heating in the E-region. Ann. Geophys., volume 31, pages 1163-1176,  2013 .

R. A. Makarevich and M. J. Nicolls. Statistical comparison of TEC derived from GPS and ISR observations at high latitudes. Radio Sci., volume 48, pages 441-452,  2013 .

R. Michell and M. Samara. Observability of NEIALs with the Sondrestrom and Poker Flat incoherent scatter radars. J. Atmos. Solar-Terr. Phys., pages 299-307,  2013 .

G. W. Perry, J.-P. St.-Maurice, and K. Hosokawa. The interconnection between cross-polar cap convection and the luminosity of polar cap patches. J. Geophys. Res., volume 118, issue 1, pages 7306-7315,  2013 .

L. A. Rooker, M. C. Lee, R. Pradipta, and B. J. Watkins. Generation and detection of whistler wave induced space plasma turbulence at Gakona, Alaska. Physica Scripta, volume 155,  2013 .

M. Samara and R. Michell. Optical and radar observations of small-scale polar cap auroral structures. J. Atmos. Solar-Terr. Phys., pages 308-312,  2013 .

E. Sergeev, S. Grach, A. Shindin, E. Mishin, P. Bernhardt, S. Briczinski, B. Isham, M. Broughton, J. LaBelle, and B. Watkins. Artificial Ionospheric Layers during Pump Frequency Stepping Near the 4th Gyroharmonic at HAARP. Phys. Rev. Lett., volume 110, issue 6,  2013 .

T. Valentic, J. Buonocore, M. Cousins, C. Heinselman, J. Jorgensen, J. Kelly, M. Malone, M. Nicolls, and A. van Eyken. AMISR: The Advanced Modular Incoherent Scatter Radar. 2013 IEEE International Symposium on Phased Array Systems and Technology,  2013 .

J. Yee and S. Close. Plasma turbulence of nonspecular trail plasmas as measured by a high-power large-aperture radar. J. Geophys. Res., volume 118, issue 24, pages 13449-13462,  2013 .

S. Zou, A. Ridley, M. Moldwin, M. Nicolls, A. Coster, and M. Ruohoniemi. Multi-instrument Observations of Storm Enhanced Density (SED) during Oct. 24-25 2011 Storm: Implications for SED Formation Processes. J. Geophys. Res., volume 118, pages 7798-7809,  2013 .

S. Zou, M. B. Moldwin, M. J. Nicolls, A. J. Ridley, A. J. Coster, E. Yizengaw, L. R. Lyons, and E. F. Donovan. Electrodynamics of the high-latitude trough: its relationship with convection flows and field-aligned currents. J. Geophys. Res., volume 118, pages 2565-2572,  2013 .

H. Akbari, J. L. Semeter, H. Dahlgren, M. Diaz, M. Zettergren, A. Strømme, M. J. Nicolls, and C. Heinselman. Anomalous ISR echoes preceding auroral breakup: Evidence for strong Langmuir turbulence. Geophys. Res. Lett., volume 39,  2012 .

H. Bahcivan and J. W. Cutler. Radio Aurora Explorer: Mission science and radar system. Radio Sci., volume 47,  2012 .

H. Bahcivan, J. W. Cutler, M. Bennett, B. Kempke, J. C. Springmann, J. Buonocore, M. Nicolls, and R. Doe. First measurements of radar coherent scatter by the Radio Aurora Explorer CubeSat. Geophys. Res. Lett., volume 39,  2012 .

J. K. Burchill, J. H. Clemmons, D. J. Knudsen, M. Larsen, M. J. Nicolls, R. F. Pfaff, D. Rowland, and L. Sangalli. High-latitude E region ionosphere-thermosphere coupling: A comparative study using in situ and incoherent scatter radar observations. J. Geophys. Res., volume 117,  2012 .

H. Dahlgren, G. W. Perry, J. L. Semeter, J.-P. St.-Maurice, K. Hosokawa, M. J. Nicolls, M. Greffen, K. Shiokawa, and C. Heinselman. Space-time variability of polar cap patches: Direct evidence for internal plasma structuring. J. Geophys. Res., volume 117,  2012 .

H. Dahlgren, J. L. Semeter, K. Hosokawa, M. J. Nicolls, T. W. Butler, M. G. Johnsen, K. Shiokawa, and C. Heinselman. Direct three-dimensional imaging of polar ionospheric structures with the Resolute Bay Incoherent Scatter Radar. Geophys. Res. Lett., volume 39,  2012 .

J. T. Fentzke, V. Hsu, C. G. M. Brum, I. Strelnikova, M. Rapp, and M. Nicolls. D region meteoric smoke and neutral temperature retrieval using the poker flat incoherent scatter radar. Geophys. Res. Lett., volume 39, issue 21,  2012 .

D. Hysell, R. Miceli, J. Munk, D. Hampton, C. Heinselman, M. Nicolls, S. Powell, K. Lynch, and M. Lessard. Comparing VHF coherent scatter from the radar aurora with incoherent scatter and all-sky auroral imagery. J. Geophys. Res., volume 117,  2012 .

P. T. Jayachandran, K. Hosokawa, K. Shiokawa, Y. Otsuka, C. Watson, S. C. Mushini, J. W. Macdougall, P. Prikryl, R. Chadwick, and T. D. Kelly. GPS total electron content variations associated with poleward moving Sun-aligned arcs. J. Geophys. Res., volume 117,  2012 .

A. V. Koustov, K. Hosokawa, N. Nishitani, K. Shiokawa, and H. Liu. Signatures of moving polar cap arcs in the F-region PolarDARN echoes. Ann. Geophys., volume 30, issue 3, pages 441-455,  2012 .

T. B. Leyser, F. Waldemarsson, and S. C. Buchert. Plasma angular momentum effects and twisted incoherent scatter radar beams. Radio Sci., volume 47, issue 5,  2012 .

K. A. Lynch, D. Hampton, M. Mella, B. Zhang, H. Dahlgren, M. Disbrow, P. M. Kintner, M. Lessard, E. Lundberg, and H. C. Stenbaek-Nielsen. Structure and dynamics of the nightside poleward boundary: Sounding rocket and ground-based observations of auroral electron precipitation in a rayed curtain. J. Geophys. Res., volume 117,  2012 .

M. J. Nicolls, S. L. Vadas, J. W. Meriwether, M. G. Conde, and D. Hampton. The phases and amplitudes of gravity waves propagating and dissipating in the thermosphere: Application to measurements over Alaska. J. Geophys. Res., volume 117,  2012 .

M. J. Nicolls, D. C. Fritts, D. Janches, and C. J. Heinselman. Momentum flux determination using the multi-beam Poker Flat Incoherent Scatter Radar. Ann. Geophys., volume 30, issue 6, pages 945-962,  2012 .

T. Nishiyama, T. Sakanoi, Y. Miyoshi, R. Kataoka, D. L. Hampton, Y. Katoh, K. Asamura, and S. Okano. Fine scale structures of pulsating auroras in the early recovery phase of substorm using ground-based EMCCD camera. J. Geophys. Res., volume 117,  2012 .

D. R. Themens, P. T. Jayachandran, R. B. Langley, J. W. Macdougall, and M. J. Nicolls. Determining receiver biases in GPS-derived total electron content in the auroral oval and polar cap region using ionosonde measurements. GPS Solutions,  2012 .

S. L. Vadas and M. J. Nicolls. The phases and amplitudes of gravity waves propagating and dissipating in the thermosphere: Theory. J. Geophys. Res., volume 117,  2012 .

R. Volz and S. Close. Inverse filtering of radar signals using compressed sensing with application to meteors. Radio Sci., volume 47,  2012 .

Y.-M. Cho, G. G. Shepherd, M. G. Shepherd, W. K. Hocking, N. J. Mitchell, and Y. I. Won. A study of temperature and meridional wind relationships at high northern latitudes. J. Atmos. Solar-Terr. Phys., volume 73, issue 9, pages 936-943,  2011 .

T. W. Garner, R. B. Harris, J. A. York, C. S. Herbster, C. F. I. Minter, and D. L. Hampton. An auroral scintillation observation using precise, collocated GPS receivers. Radio Sci., volume 46, issue 1,  2011 .

W. K. Hocking and G. K. Kumar. Long term behaviour of the MLT quasi-7-day wave at two radar-sites at northern polar latitudes. J. Atmos. Solar-Terr. Phys., volume 73, pages 1616-1628,  2011 .

K. Hosokawa, J. I. Moen, K. Shiokawa, and Y. Otsuka. Decay of polar cap patch. J. Geophys. Res., volume 116,  2011 .

K. Hosokawa, J. I. Moen, K. Shiokawa, and Y. Otsuka. Motion of polar cap arcs. J. Geophys. Res., volume 116,  2011 .

J. Liang, E. Spanswick, M. J. Nicolls, E. F. Donovan, D. Lummerzheim, and W. W. Liu. Multi-instrument observations of soft electron precipitation and its association with magnetospheric flows. J. Geophys. Res., volume 116,  2011 .

L. R. Lyons, Y. Nishimura, H.-J. Kim, E. Donovan, V. Angelopoulos, G. Sofko, M. Nicolls, C. Heinselman, J. M. Ruohoniemi, and N. Nishitani. Possible connection of polar cap flows to pre- and post-substorm onset PBIs and streamers. J. Geophys. Res., volume 116,  2011 .

M. R. Mella, K. A. Lynch, D. L. Hampton, H. Dahlgren, P. M. Kintner, M. Lessard, D. Lummerzheim, E. T. Lundberg, M. J. Nicolls, and H. C. Stenbaek-Nielsen. Sounding rocket study of two sequential auroral poleward boundary intensifications. J. Geophys. Res., volume 116,  2011 .

T. Pedersen, M. McCarrick, B. Reinisch, B. Watkins, R. Hamel, and V. Paznukhov. Production of artificial ionospheric layers by frequency sweeping near the 2nd gyroharmonic. Ann. Geophys., volume 29, issue 1, pages 47-51,  2011 .

J. J. Sojka, M. Nicolls, A. van Eyken, C. Heinselman, and D. Bilitza. 24/7 Solar minimum polar cap and auroral ion temperature observations. Advances in Space Research, volume 48,  2011 .

N. Swarnalingam, W. K. Hocking, and J. R. Drummond. Long-term aspect-sensitivity measurements of polar mesosphere summer echoes (PMSE) at Resolute Bay using a 51.5 MHz VHF radar. J. Atmos. Solar-Terr. Phys., volume 73, issue 9, pages 957-964,  2011 .

R. H. Varney, M. C. Kelley, M. J. Nicolls, C. J. Heinselman, and R. L. Collins. The electron density dependence of polar mesospheric summer echoes. J Atmos Sol-Terr Phy, volume 73,  2011 .

S. Zou, M. B. Moldwin, A. Coster, L. R. Lyons, and M. J. Nicolls. GPS TEC observations of dynamics of the mid-latitude trough during substorms. Geophys. Res. Lett., volume 38,  2011 .

H. Bahcivan, R. Tsunoda, M. J. Nicolls, and C. J. Heinselman. Initial ionospheric observations made by the new Resolute incoherent scatter radar and comparison to solar wind IMF. Geophys. Res. Lett., volume 37,  2010 .

T. W. Butler, J. Semeter, C. J. Heinselman, and M. J. Nicolls. Imaging F region drifts using monostatic phased-array incoherent scatter radar. Radio Sci., volume 45,  2010 .

J. A. Cohen, R. Pradipta, L. M. Burton, A. Labno, M. C. Lee, B. J. Watkins, C. Fallen, S. P. Kuo, W. J. Burke, D. Mabius, and B. Z. See. Generation of ionospheric ducts by the HAARP HF heater. Physica Scripta, volume 142,  2010 .

M. G. Conde and M. J. Nicolls. Thermospheric temperatures above Poker Flat, Alaska, during the stratospheric warming event of January and February 2009. J. Geophys. Res., volume 115,  2010 .

R. Cosgrove, M. Nicolls, H. Dahlgren, S. Ranjan, E. Sanchez, and R. Doe. Radar detection of a localized 1.4 Hz pulsation in auroral plasma, simultaneous with pulsating optical emissions, during a substorm. Ann Geophys, volume 28,  2010 .

K. Hosokawa, J.-P. St.-Maurice, G. J. Sofko, K. Shiokawa, Y. Otsuka, and T. Ogawa. Reorganization of polar cap patches through shears in the background plasma convection. J. Geophys. Res., volume 115,  2010 .

K. Hosokawa, T. Tsugawa, K. Shiokawa, Y. Otsuka, N. Nishitani, T. Ogawa, and M. R. Hairston. Dynamic temporal evolution of polar cap tongue of ionization during magnetic storm. J. Geophys. Res., volume 115,  2010 .

M. C. Kelley, M. J. Nicolls, R. H. Varney, R. L. Collins, R. Doe, J. M. C. Plane, J. Thayer, M. Taylor, B. Thurairajah, and K. Mizutani. Radar, lidar, and optical observations in the polar summer mesosphere shortly after a space shuttle launch. J. Geophys. Res., volume 115,  2010 .

G. K. Kumar and W. K. Hocking. Climatology of northern polar latitude MLT dynamics: mean winds and tides. Ann. Geophys., volume 28, issue 1, pages 1859-1876,  2010 .

L. R. Lyons, Y. Nishimura, Y. Shi, S. Zou, H.-J. Kim, V. Angelopoulos, C. Heinselman, M. J. Nicolls, and K.-H. Fornacon. Substorm triggering by new plasma intrusion: Incoherent-scatter radar observations. J. Geophys. Res., volume 115,  2010 .

R. G. Michell and M. Samara. High-resolution observations of naturally enhanced ion acoustic lines and accompanying auroral fine structures. J. Geophys. Res., volume 115,  2010 .

R. G. Michell. Simultaneous optical and radar measurements of meteors using the Poker Flat Incoherent Scatter Radar. J Atmos Sol-Terr Phy, volume 72,  2010 .

M. J. Nicolls, R. H. Varney, S. L. Vadas, P. A. Stamus, C. J. Heinselman, R. B. Cosgrove, and M. C. Kelley. Influence of an inertia-gravity wave on mesospheric dynamics: A case study with the Poker Flat Incoherent Scatter Radar. J. Geophys. Res., volume 115,  2010 .

Y. Nishimura, L. R. Lyons, S. Zou, X. Xing, V. Angelopoulos, S. B. Mende, J. W. Bonnell, D. Larson, U. Auster, T. Hori, N. Nishitani, K. Hosokawa, G. Sofko, M. Nicolls, and C. Heinselman. Preonset time sequence of auroral substorms: Coordinated observations by all-sky imagers, satellites, and radars. J. Geophys. Res., volume 115,  2010 .

M. Samara and R. G. Michell. Ground-based observations of diffuse auroral frequencies in the context of whistler mode chorus. J. Geophys. Res., volume 115,  2010 .

J. Semeter, T. W. Butler, M. Zettergren, C. J. Heinselman, and M. J. Nicolls. Composite imaging of auroral forms and convective flows during a substorm cycle. J. Geophys. Res., volume 115,  2010 .

J. J. Sparks, D. Janches, M. J. Nicolls, and C. Heinselman. Determination of physical and radiant meteor properties using PFISR interferometry measurements of head echoes. J Atmos Sol-Terr Phy, volume 72,  2010 .

S.-R. Zhang, J. M. Holt, A. P. van Eyken, C. Heinselman, and M. McCready. IPY observations of ionospheric yearly variations from high- to middle-latitude incoherent scatter radars. J. Geophys. Res., volume 115,  2010 .

S. Zou, M. B. Moldwin, L. R. Lyons, Y. Nishimura, M. Hirahara, T. Sakanoi, K. Asamura, M. J. Nicolls, Y. Miyashita, S. B. Mende, and C. J. Heinselman. Identification of substorm onset location and preonset sequence using Reimei, THEMIS GBO, PFISR, and Geotail. J. Geophys. Res., volume 115,  2010 .

H. Bahcivan, M. C. Kelley, and J. W. Cutler. Radar and rocket comparison of UHF radar scattering from auroral electrojet irregularities: Implications for a nanosatellite radar. J. Geophys. Res., volume 114,  2009 .

J. L. Chau, F. R. Galindo, C. J. Heinselman, and M. J. Nicolls. Meteor-head echo observations using an antenna compression approach with the 450 MHz Poker Flat Incoherent Scatter Radar. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 636-643,  2009 .

J. T. Fentzke, D. Janches, and J. J. Sparks. Latitudinal and seasonal variability of the micrometeor input function: A study using model predictions and observations from Arecibo and PFISR. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 653-661,  2009 .

B. Gustavsson, R. Newsome, T. B. Leyser, M. J. Kosch, L. Norin, M. McCarrick, T. Pedersen, and B. J. Watkins. First observations of X-mode suppression of O-mode HF enhancements at 6300 A . Geophys. Res. Lett., volume 36,  2009 .

K. Hosokawa, K. Shiokawa, Y. Otsuka, T. Ogawa, J.-P. St.-Maurice, G. J. Sofko, and D. A. Andre. Relationship between polar cap patches and field-aligned irregularities as observed with an all-sky airglow imager at Resolute Bay and the PolarDARN radar at Rankin Inlet. J. Geophys. Res., volume 114,  2009 .

K. Hosokawa, T. Tsugawa, K. Shiokawa, Y. Otsuka, T. Ogawa, and M. R. Hairston. Unusually elongated, bright airglow plume in the polar cap F region: Is it a tongue of ionization? Geophys. Res. Lett., volume 36, issue 7,  2009 .

K. Hosokawa, T. Kashimoto, S. Suzuki, K. Shiokawa, Y. Otsuka, and T. Ogawa. Motion of polar cap patches: A statistical study with all-sky airglow imager at Resolute Bay, Canada. J. Geophys. Res., volume 114,  2009 .

D. L. Hysell, G. Michhue, M. J. Nicolls, C. J. Heinselman, and M. F. Larsen. Assessing auroral electric field variance with coherent and incoherent scatter radar. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 697-707,  2009 .

D. Janches, D. C. Fritts, M. J. Nicolls, and C. J. Heinselman. Observations of D-region structure and atmospheric tides with PFISR during active aurora. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 688-696,  2009 .

P. T. Jayachandran, K. Hosokawa, J. W. Macdougall, S. Mushini, R. B. Langley, and K. Shiokawa. GPS total electron content variations associated with a polar cap arc. J. Geophys. Res., volume 114,  2009 .

S. L. Jones, M. R. Lessard, P. A. Fernandes, D. Lummerzheim, J. L. Semeter, C. J. Heinselman, K. A. Lynch, R. G. Michell, P. M. Kintner, H. C. Stenbaek-Nielsen, and K. Asamura. PFISR and ROPA observations of pulsating aurora. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 708-716,  2009 .

J. D. Kelly and C. J. Heinselman. Initial results from Poker Flat Incoherent Scatter Radar (PFISR). J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 635,  2009 .

M. J. Kosch, B. Gustavsson, C. Heinselman, T. Pedersen, M. T. Rietveld, J. Spaleta, A. Wong, W. Wang, C. Mutiso, B. Bristow, and J. Hughes. First incoherent scatter radar observations of ionospheric heating on the second electron gyro-harmonic. J. Atmos Solar-Terr. Phys., volume 71, issue 1, pages 1959-1966,  2009 .

D. J. Livneh, I. Seker, F. T. Djuth, and J. D. Mathews. Omnipresent vertically coherent fluctuations in the ionosphere with a possible worldwide-midlatitude extent. J. Geophys. Res., volume 114,  2009 .

L. R. Lyons, S. Zou, C. J. Heinselman, M. J. Nicolls, and P. C. Anderson. Poker flat radar observations of the magnetosphere-ionosphere coupling electrodynamics of the earthward penetrating plasma sheet following convection enhancements. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 717-728,  2009 .

L. R. Lyons, H.-J. Kim, X. Xing, S. Zou, D.-Y. Lee, C. Heinselman, M. J. Nicolls, V. Angelopoulos, D. Larson, J. McFadden, A. Runov, and K.-H. Fornacon. Evidence that solar wind fluctuations substantially affect global convection and substorm occurrence. J. Geophys. Res., volume 114,  2009 .

R. G. Michell, K. A. Lynch, C. J. Heinselman, and H. C. Stenbaek-Nielsen. High time resolution PFISR and optical observations of naturally enhanced ion acoustic lines. Ann. Geophys., volume 27, issue 4, pages 1457-1467,  2009 .

M. J. Nicolls, M. C. Kelley, R. H. Varney, and C. J. Heinselman. Spectral observations of polar mesospheric summer echoes at 33 cm (450 MHz) with the Poker Flat Incoherent Scatter Radar. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 662-674,  2009 .

E. Nossa, D. L. Hysell, C. T. Fallen, and B. J. Watkins. Radar observations of artificial E-region field-aligned irregularities. Ann. Geophys., volume 27, issue 7, pages 2699-2710,  2009 .

P. G. Richards, M. J. Nicolls, C. J. Heinselman, J. J. Sojka, J. M. Holt, and R. R. Meier. Measured and modeled ionospheric densities, temperatures, and winds during the international polar year. J. Geophys. Res., volume 114,  2009 .

A. Roy, S. J. Briczinski, J. F. Doherty, and J. D. Mathews. Genetic-Algorithm-Based Parameter Estimation Technique for Fragmenting Radar Meteor Head Echoes. IEEE Geoscience and Remote Sensing Letters, volume 6, pages 363-367,  2009 .

L. Sangalli. SOUNDING ROCKET PROBING OF THE IONOSPHERIC COLLISIONAL TRANSITION REGION. Ph.D. Thesis, University of Calgary,  2009 .

L. Sangalli, D. J. Knudsen, M. F. Larsen, T. Zhan, R. F. Pfaff, and D. Rowland. Rocket-based measurements of ion velocity, neutral wind, and electric field in the collisional transition region of the auroral ionosphere. J. Geophys. Res., volume 114,  2009 .

J. Semeter, T. Butler, C. Heinselman, M. Nicolls, J. Kelly, and D. Hampton. Volumetric imaging of the auroral ionosphere: Initial results from PFISR. J. Atmos Solar-Terr. Phys., volume 71, issue 6, pages 738-743,  2009 .

J. J. Sojka, M. J. Nicolls, C. J. Heinselman, and J. D. Kelly. The PFISR IPY observations of ionospheric climate and weather. J. Atmos. Solar-Terr. Phys., volume 71, issue 6, pages 771-785,  2009 .

J. J. Sojka, R. L. McPherron, A. P. van Eyken, M. J. Nicolls, C. J. Heinselman, and J. D. Kelly. Observations of ionospheric heating during the passage of solar coronal hole fast streams. Geophys. Res. Lett., volume 36, issue 1,  2009 .

J. J. Sparks, D. Janches, M. J. Nicolls, and C. J. Heinselman. Seasonal and diurnal variability of the meteor flux at high latitudes observed using PFISR. J. Atmos. Solar-Terr. Phys., volume 71, issue 6, pages 644-652,  2009 .

J. J. Sparks and D. Janches. Correction to “Latitudinal dependence of the variability of the micrometeor altitude distribution”. Geophys. Res. Lett., volume 36, issue 1,  2009 .

J. J. Sparks and D. Janches. Latitudinal dependence of the variability of the micrometeor altitude distribution. Geophys. Res. Lett., volume 36,  2009 .

S. Suzuki, K. Shiokawa, K. Hosokawa, K. Nakamura, and W. K. Hocking. Statistical characteristics of polar cap mesospheric gravity waves observed by an all-sky airglow imager at Resolute Bay, Canada. J. Geophys. Res., volume 114,  2009 .

N. Swarnalingam, W. K. Hocking, W. Singer, and R. Latteck. Calibrated measurements of PMSE strengths at three different locations observed with SKiYMET radars and narrow beam VHF radars. J. Atmos. Solar-Terr. Phys., volume 71, issue 1, pages 1807-1813,  2009 .

N. Swarnalingam, W. K. Hocking, and P. S. Argall. Radar efficiency and the calculation of decade-long PMSE backscatter cross-section for the Resolute Bay VHF radar. Ann. Geophys., volume 27, issue 4, pages 1643-1656,  2009 .

M. J. Taylor, Y. Zhao, P.-D. Pautet, M. J. Nicolls, R. L. Collins, J. Barker-Tvedtnes, C. D. Burton, B. Thurairajah, J. Reimuller, R. H. Varney, C. J. Heinselman, and K. Mizutani. Coordinated optical and radar image measurements of noctilucent clouds and polar mesospheric summer echoes. J. Atmos. Solar-Terr. Phys., volume 71, issue 6, pages 675-687,  2009 .

S. L. Vadas and M. J. Nicolls. Temporal evolution of neutral, thermospheric winds and plasma response using PFISR measurements of gravity waves. J. Atmos. Solar-Terr. Phys., volume 71, issue 6, pages 744-770,  2009 .

R. H. Varney, M. J. Nicolls, C. J. Heinselman, and M. C. Kelley. Observations of polar mesospheric summer echoes using PFISR during the summer of 2007. J. Atmos. Solar-Terr. Phys., volume 71, issue 3, pages 470-476,  2009 .

S. Zou, L. R. Lyons, M. J. Nicolls, C. J. Heinselman, and S. B. Mende. Nightside ionospheric electrodynamics associated with substorms: PFISR and THEMIS ASI observations. J. Geophys. Res., volume 114,  2009 .

S. Zou, L. R. Lyons, M. J. Nicolls, and C. J. Heinselman. PFISR observations of strong azimuthal flow bursts in the ionosphere and their relation to nightside aurora. J. Atmos. Solar-Terr. Phys., volume 71, issue 6, pages 729-737,  2009 .

A. Belova, S. Kirkwood, D. Murtagh, N. Mitchell, W. Singer, and W. Hocking. Five-day planetary waves in the middle atmosphere from Odin satellite data and ground-based instruments in Northern Hemisphere summer 2003, 2004, 2005 and 2007. Ann. Geophys., volume 26, issue 1, pages 3557-3570,  2008 .

L. M. Burton, J. A. Cohen, R. Pradipta, A. Labno, M. C. Lee, O. Batishchev, D. L. Rokusek, S. P. Kuo, B. J. Watkins, and S. Oyama. Excitation and diagnosis of cascading Langmuir waves in ionospheric plasmas at Gakona, Alaska. Physica Scripta, volume 132,  2008 .

B. Gustavsson, M. Kosch, A. Wong, T. Pedersen, C. Heinselman, C. Mutiso, B. Bristow, J. Hughes, and W. Wang. First estimates of volume distribution of HF-pump enhanced emissions at 6300 and 5577 Å: a comparison between observations and theory. Ann. Geophys., volume 26, issue 1, pages 3999-4012,  2008 .

C. J. Heinselman and M. J. Nicolls. A Bayesian approach to electric field and E-region neutral wind estimation with the Poker Flat Advanced Modular Incoherent Scatter Radar. Radio Sci., volume 43, issue 5,  2008 .

D. L. Hysell, G. Michhue, M. F. Larsen, R. Pfaff, M. Nicolls, C. Heinselman, and H. Bahcivan. Imaging radar observations of Farley Buneman waves during the JOULE II experiment. Ann. Geophys., volume 26, issue 7, pages 1837-1850,  2008 .

L. M. Kagan, R. S. Kissack, M. C. Kelley, and R. Cuevas. Unexpected rapid decrease in phase velocity of submeter Farley-Buneman waves with altitude. Geophys. Res. Lett., volume 35, issue 3,  2008 .

M. C. Kelley, R. A. Cuevas, and D. L. Hysell. Radar scatter from equatorial electrojet waves: An explanation for the constancy of the Type I Doppler shift with zenith angle. Geophys. Res. Lett., volume 35,  2008 .

R. Latteck, W. Singer, R. J. Morris, W. K. Hocking, D. J. Murphy, D. A. Holdsworth, and N. Swarnalingam. Similarities and differences in polar mesosphere summer echoes observed in the Arctic and Antarctica. Ann. Geophys., volume 26, issue 9, pages 2795-2806,  2008 .

J. D. Mathews, S. J. Briczinski, D. D. Meisel, and C. J. Heinselman. Radio and Meteor Science Outcomes From Comparisons of Meteor Radar Observations at AMISR Poker Flat, Sondrestrom, and Arecibo. Earth Moon Planet, volume 102, pages 365-372,  2008 .

R. G. Michell, K. A. Lynch, C. J. Heinselman, and H. C. Stenbaek-Nielsen. PFISR nightside observations of naturally enhanced ion acoustic lines, and their relation to boundary auroral features. Ann. Geophys., volume 26, issue 1, pages 3623-3639,  2008 .

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