@article{Lundquist2026a,
  author = "M. T. Lundquist and R. H. Varney",
  title = "A Statistical Survey of F2 Layer Peak Properties in the Polar Cap Ionosphere Observed by RISR-N",
  year =  2026 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 131,
  number = 1,
  month = "Jan",
  keywords = "ionosphere, polar cap, incoherent scatter radar, f region, patches, risrn",
  doi = "https://doi.org/10.1029/2025JA034676",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2025JA034676",
  note = "e2025JA034676 2025JA034676"
}


@article{Mesquita2025a,
  author = "R. Mesquita and S. R. Kaeppler and R. Varney and A. Reimer and R. F. Pfaff and J. Craven and M. Conde and I. Azeem and P. Dandenault",
  title = "Quantifying Meridional Advection in the Auroral E-Region For a Range of Geomagnetic Activity Levels",
  year =  2025 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 130,
  number = 2,
  month = "Jan",
  keywords = "thermospheric winds, advective acceleration, e-region forcing, auroral forcing, sounding rockets, neutral wind advection, pfisr",
  doi = "https://doi.org/10.1029/2024JA032952",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2024JA032952",
  note = "e2024JA032952 2024JA032952"
}


@article{Themens2024a,
  author = "D. R. Themens and S. Elvidge and A. McCaffrey and P. T. Jayachandran and A. Coster and R. H. Varney and I. Galkin and L. V. Goodwin and C. Watson and S. Maguire and A. J. Kavanagh and S.-R. Zhang and L. Goncharenko and A. Bhatt and G. Dorrian and K. Groves and A. G. Wood and B. Reid",
  title = "The High Latitude Ionospheric Response to the Major May 2024 Geomagnetic Storm: A Synoptic View",
  year =  2024 ,
  journal = "Geophysical Research Letters",
  volume = 51,
  number = 19,
  month = "Sep",
  keywords = "may 2024 geomagnetic storm, ionosphere, gnss, high latitudes, superstorm, polar cap, pfisr",
  doi = "https://doi.org/10.1029/2024GL111677",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2024GL111677",
  note = "e2024GL111677 2024GL111677"
}


@article{Zhang2024a,
  author = "Y. Zhang and R. H. Varney",
  title = "A Statistical Survey of E-Region Anomalous Electron Heating Using Poker Flat Incoherent Scatter Radar Observations",
  year =  2024 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 129,
  number = 9,
  month = "Aug",
  keywords = "pfisr, farley buneman instability, anomalous electron heating, e-region ionosphere, incoherent scatter radar",
  doi = "https://doi.org/10.1029/2023JA032360",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2023JA032360"
}


@article{Kaeppler2023a,
  author = "S. Kaeppler and D. G. Markowski and A. M. Pepper and R. Troyer and A. N. Jaynes and R. H. Varney and D. Hampton",
  title = "Data-driven empirical conductance relations during auroral precipitation using incoherent scatter radar and all sky imagers",
  year =  2023 ,
  journal = "Journal of Geophysical Research: Space Physics",
  month = "Sep",
  keywords = "aurora, conductance, conductivity, precipitation, pfisr",
  doi = "https://doi.org/10.1029/2023JA031764"
}


@article{Madera2023a,
  author = "D. J. Madera and R. A. Marshall and S. Elschot and S. Kaeppler and P. Reyes and R. H. Varney and A. B. Crew",
  title = "Time-Dependent Inversion of Energetic Electron Precipitation Spectra From Ground-Based Incoherent Scatter Radar Measurements",
  year =  2023 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 128,
  number = 5,
  keywords = "pfisr, d-region",
  doi = "https://doi.org/10.1029/2022JA031000",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022JA031000",
  note = "e2022JA031000 2022JA031000"
}


@article{Godbole2022a,
  author = "N. H. Godbole and M. R. Lessard and D. R. Kenward and B. A. Fritz and R. H. Varney and R. G. Michell and D. Hampton",
  title = "Observations of ion upflow and 630.0 nm emission during pulsating aurora",
  year =  2022 ,
  journal = "Frontiers in Physics",
  volume = 10,
  keywords = "pfisr",
  doi = "10.3389/fphy.2022.997229",
  url = "https://www.frontiersin.org/articles/10.3389/fphy.2022.997229"
}


@article{Meng2022a,
  author = "X. Meng and D. S. Ozturk and O. P. Verkhoglyadova and R. H. Varney and A. S. Reimer and J. L. Semeter and S. R. Kaeppler and W. Zhan",
  title = "Energy Deposition by Mesoscale High-Latitude Electric Fields Into the Thermosphere During the 26 October 2019 Geomagnetic Storm",
  year =  2022 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 127,
  number = 12,
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2022JA030716",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022JA030716",
  note = "e2022JA030716 2022JA030716"
}


@article{Ma2022a,
  author = "Q. Ma and W. Xu and E. R. Sanchez and R. A. Marshall and J. Bortnik and P. M. Reyes and R. H. Varney and S. R. Kaeppler and Y. Miyoshi and A. Matsuoka and Y. Kasahara and S. Matsuda and F. Tsuchiya and A. Kumamoto and S. Kasahara and S. Yokota and K. Keika and T. Hori and T. Mitani and S. Nakamura and Y. Kazama and S.-Y. Wang and C.-W. Jun and I. Shinohara and S. W.-Y. Tam",
  title = "Analysis of Electron Precipitation and Ionospheric Density Enhancements Due To Hiss Using Incoherent Scatter Radar and Arase Observations",
  year =  2022 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 127,
  number = 8,
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2022JA030545",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022JA030545",
  note = "e2022JA030545 2022JA030545"
}


@article{Sanchez2022a,
  author = "E. R. Sanchez and Q. Ma and W. Xu and R. A. Marshall and J. Bortnik and P. Reyes and R. Varney and S. Kaeppler",
  title = "A Test of Energetic Particle Precipitation Models Using Simultaneous Incoherent Scatter Radar and Van Allen Probes Observations",
  year =  2022 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 127,
  number = 8,
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2021JA030179",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JA030179",
  note = "e2021JA030179 2021JA030179"
}


@article{Wang2022a,
  author = "Y. Wang and D. R. Themens and C. Wang and Y.-Z. Ma and A. Reimer and R. Varney and R. Gilies and Z.-Y. Xing and Q.-H. Zhang and P. T. Jayachandran",
  title = "Simultaneous Observations of a Polar Cap Sporadic-E Layer by Twin Incoherent Scatter Radars at Resolute",
  year =  2022 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 127,
  number = 6,
  keywords = "risrn, risrc",
  doi = "https://doi.org/10.1029/2022JA030366",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022JA030366",
  note = "e2022JA030366 2022JA030366"
}


@article{Zhan2021b,
  author = "W. Zhan and S. R. Kaeppler and M. F. Larsen and A. Reimer and R. Varney",
  title = "An Investigation of Auroral E Region Energy Exchange Using Poker Flat Incoherent Scatter Radar Observations During Fall Equinox Conditions",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 10,
  month = "Nov",
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2021JA029371",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JA029371",
  note = "e2021JA029371 2021JA029371"
}


@article{Lamarche2021a,
  author = "L. J. Lamarche and R. H. Varney and A. S. Reimer",
  title = "Ion Heating in the Polar Cap Under Northwards IMF Bz",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 11,
  month = "Oct",
  keywords = "risrn",
  doi = "https://doi.org/10.1029/2021JA029155",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JA029155",
  note = "e2021JA029155 2021JA029155"
}


@article{Aa2021a,
  author = "E. Aa and S.-R. Zhang and P. J. Erickson and A. J. Coster and L. P. Goncharenko and R. H. Varney and R. Eastes",
  title = "Salient Midlatitude Ionosphere-Thermosphere Disturbances Associated With SAPS During a Minor but Geo-Effective Storm at Deep Solar Minimum",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 7,
  month = "Jun",
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2021JA029509",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JA029509",
  note = "e2021JA029509 2021JA029509"
}


@article{Zhan2021a,
  author = "W. Zhan and S. R. Kaeppler and A. Reimer and R. Varney",
  title = "Seasonal and Solar Cycle Dependence of Energy Transfer Rates in the Auroral E-Region",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 12,
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2021JA029719",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JA029719",
  note = "e2021JA029719 2021JA029719"
}


@article{Zou2021b,
  author = "Y. Zou and L. Lyons and M. Conde and R. Varney and V. Angelopoulos and S. Mende",
  title = "Effects of Substorms on High-Latitude Upper Thermospheric Winds",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 1,
  keywords = "pfisr, pfrr",
  doi = "https://doi.org/10.1029/2020JA028193",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028193"
}


@article{Lyons2021a,
  author = "L. R. Lyons and J. Liu and Y. Nishimura and C.-P. Wang and A. S. Reimer and W. A. Bristow and D. L. Hampton and X. Shi and R. H. Varney and E. F. Donovan",
  title = "Radar Observations of Flows Leading to Longitudinal Expansion of Substorm Onset over Alaska",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  keywords = "pfisr, pfrr",
  doi = "https://doi.org/10.1029/2020JA028148",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028148"
}


@article{Ren2020a,
  author = "J. Ren and S. Zou and J. Lu and N. Giertych and Y. Chen and R. H. Varney and A. S. Reimer",
  title = "Statistical Study of Ion Upflow and Downflow Observed by PFISR",
  year =  2020 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 125,
  number = 10,
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2020JA028179",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028179"
}


@article{Wang2020a,
  author = "B. Wang and Y. Nishimura and M. Hartinger and N. Sivadas and L. L. Lyons and R. H. Varney and V. Angelopoulos",
  title = "Ionospheric Modulation by Storm Time Pc5 ULF Pulsations and the Structure Detected by PFISR-THEMIS Conjunction",
  year =  2020 ,
  journal = "Geophysical Research Letters",
  volume = 47,
  number = 16,
  keywords = "pfisr",
  doi = "10.1029/2020GL089060",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020GL089060"
}


@article{Fraunberger2020a,
  author = "M. Fraunberger and K. A. Lynch and R. Clayton and T. M. Roberts and D. Hysell and M. Lessard and A. Reimer and R. Varney",
  title = "Auroral ionospheric plasma flow extraction using subsonic retarding potential analyzers",
  year =  2020 ,
  journal = "Review of Scientific Instruments",
  volume = 91,
  number = 9,
  keywords = "pfisr, pfrr",
  doi = "10.1063/1.5144498",
  url = "https://doi.org/10.1063/1.5144498"
}


@article{Nishimura2020a,
  author = "Y. Nishimura and L. R. Lyons and C. Gabrielse and N. Sivadas and E. F. Donovan and R. H. Varney and V. Angelopoulos and J. M. Weygand and M. G. Conde and S. R. Zhang",
  title = "Extreme Magnetosphere-Ionosphere-Thermosphere Responses to the 5 April 2010 Supersubstorm",
  year =  2020 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 125,
  number = 4,
  keywords = "pfisr, pfrr",
  doi = "10.1029/2019JA027654",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JA027654",
  note = "e2019JA027654 2019JA027654"
}


@article{Lamarche2020a,
  author = "L. J. Lamarche and R. H. Varney and C. L. Siefring",
  title = "Analysis of Plasma Irregularities on a Range of Scintillation-Scales Using the Resolute Bay Incoherent Scatter Radars",
  year =  2020 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 125,
  number = 3,
  keywords = "risrn, risrc, rbo",
  doi = "10.1029/2019JA027112",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JA027112",
  note = "e2019JA027112 10.1029/2019JA027112"
}


@article{Ozturk2020a,
  author = "D. S. Ozturk and X. Meng and O. P. Verkhoglyadova and R. H. Varney and A. S. Reimer and J. L. Semeter",
  title = "A New Framework to Incorporate High-Latitude Input for Mesoscale Electrodynamics",
  year =  2020 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 125,
  number = 1,
  keywords = "pfisr",
  doi = "10.1029/2019JA027562",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JA027562",
  note = "e2019JA027562 10.1029/2019JA027562"
}


@inbook{Kaeppler2020a,
  author = "S. R. Kaeppler and E. Sanchez and R. H. Varney and R. J. Irvin and R. A. Marshall and J. Bortnik and A. S. Reimer and P. M. Reyes",
  title = "Chapter 6 - Incoherent scatter radar observations of 10–100keV precipitation: review and outlook",
  year =  2020 ,
  booktitle = "The Dynamic Loss of Earth's Radiation Belts",
  publisher = "Elsevier",
  keywords = "pfisr",
  doi = "https://doi.org/10.1016/B978-0-12-813371-2.00006-8",
  url = "http://www.sciencedirect.com/science/article/pii/B9780128133712000068"
}


@article{Wu2019a,
  author = "Q. Wu and D. Knipp and J. Liu and W. Wang and R. Varney and R. Gillies and P. Erickson and M. Greffen and A. Reimer and I. Häggström and G. Jee and Y.-S. Kwak",
  title = "HIWIND Observation of Summer Season Polar Cap Thermospheric Winds",
  year =  2019 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 124,
  number = 11,
  month = "Oct",
  keywords = "risrc",
  doi = "10.1029/2019JA027258",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JA027258"
}


@article{Clayton2019a,
  author = "R. Clayton and K. Lynch and M. Zettergren and M. Burleigh and M. Conde and G. Grubbs and D. Hampton and D. Hysell and M. Lessard and R. Michell and A. Reimer and T. M. Roberts and M. Samara and R. Varney",
  title = "Two-Dimensional Maps of In Situ Ionospheric Plasma Flow Data Near Auroral Arcs Using Auroral Imagery",
  year =  2019 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 124,
  number = 4,
  month = "Apr",
  keywords = "pfisr",
  doi = "10.1029/2018JA026440",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018JA026440"
}


@article{Themens2019a,
  author = "D. R. Themens and P. Jayachandran and A. M. McCaffrey and B. Reid and R. H. Varney",
  title = "A Bottomside Parameterization for the Empirical Canadian High Arctic Ionospheric Model",
  year =  2019 ,
  journal = "Radio Science",
  volume = 54,
  number = 5,
  month = "Apr",
  keywords = "pfisr, risrn",
  doi = "10.1029/2018RS006748",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018RS006748"
}


@article{Gillies2018a,
  author = "R. G. Gillies and G. W. Perry and A. V. Koustov and R. H. Varney and A. S. Reimer and E. Spanswick and J.-P. St.-Maurice and E. Donovan",
  title = "Large-scale comparison of polar cap ionospheric velocities measured by RISR-C, RISR-N, and SuperDARN",
  year =  2018 ,
  journal = "Journal of Geophysical Research: Radio Science",
  publisher = "American Geophysical Union",
  volume = 53,
  keywords = "risrn, risrc",
  doi = "10.1029/2017RS006435"
}


@article{Ren2018a,
  author = "J. Ren and S. Zou and R. G. Gillies and E. Donovan and R. H. Varney",
  title = "Statistical characteristics of polar cap patches observed by RISR‐C",
  year =  2018 ,
  journal = "Journal of Geophysical Research: Space Physics",
  publisher = "American Geophysical Union",
  volume = 123,
  keywords = "risrc",
  doi = "10.1029/2018JA025621"
}


@article{Zou2018a,
  author = "Y. Zou and Y. Nishimura and L. Lyons and M. Conde and R. Varney and V. Angelopoulos and S. Mende",
  title = "Mesoscale F region neutral winds associated with quasi‐steady and transient nightside auroral forms",
  year =  2018 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 123,
  keywords = "pfisr, pfrr",
  doi = "10.1029/2018JA025457"
}


@article{Triplett2018a,
  author = "C. C. Triplett and J. Li and R. L. Collins and G. A. Lehmacher and A. Barjatya and D. C. Fritts and B. Strelnikov and F.-J. Luebken and B. Thurairajah and V. L. Harvey and D. L. Hampton and R. H. Varney",
  title = "Observations of Reduced Turbulence and Wave Activity in the Arctic Middle Atmosphere Following the January 2015 Sudden Stratospheric Warming",
  year =  2018 ,
  journal = "Journal of Geophysical Research: Atmospheres",
  publisher = "American Geophysical Union",
  volume = 123,
  keywords = "pfisr, pfrr",
  doi = "10.1029/2018JD028788"
}


@article{Liang2018a,
  author = "J. Liang and E. Donovan and A. Reimer and D. Hampton and S. Zou and R. Varney",
  title = "Ionospheric electron heating associated with pulsating auroras: Joint optical and PFISR observations",
  year =  2018 ,
  journal = "Journal of Geophysical Research: Space Physics",
  publisher = "American Geophysical Union",
  volume = 123,
  pages = "4430-4456",
  keywords = "pfisr, pfrr",
  doi = "10.1029/2017JA025138",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2017JA025138"
}


@article{Themens2018b,
  author = "D. R. Themens and P. Jayachandran and R. H. Varney",
  title = "Examining the use of the NeQuick bottomside and topside parameterizations at high latitudes",
  year =  2018 ,
  journal = "Advances in Space Research",
  publisher = "American Geophysical Union",
  volume = 61,
  number = 1,
  pages = "287-294",
  keywords = "pfisr, risrn",
  doi = "10.1016/j.asr.2017.09.037",
  url = "https://www.sciencedirect.com/science/article/pii/S0273117717307044"
}


@article{Themens2018a,
  author = "D. R. Themens and P. T. Jayachandran and D. Bilitza and P. J. Erickson and I. Haggstrom and M. V. Lyashenko and B. Reid and R. H. Varney and L. Pustovalova",
  title = "Topside electron density representations for middle and high latitudes: A topside parameterization for E-CHAIM based on the NeQuick",
  year =  2018 ,
  journal = "Journal of Geophysical Research: Space Physics",
  publisher = "American Geophysical Union",
  volume = 123,
  keywords = "pfisr, risrn",
  doi = "10.1002/2017JA024817"
}


@article{Mrak2018a,
  author = "S. Mrak and J. Semeter and M. Hirsch and G. Starr and D. Hampton and R. H. Varney and A. S. Reimer and J. Swoboda and P. J. Erickson and F. Lind and A. J. Coster and V. Pankratius",
  title = "Field-aligned GPS scintillation: Multisensor data fusion",
  year =  2018 ,
  journal = "Journal of Geophysical Research: Space Physics",
  publisher = "American Geophysical Union",
  volume = 123,
  pages = "974-992",
  keywords = "pfrr, pfisr",
  doi = "10.1002/2017JA024557"
}


@article{Zou2017b,
  author = "S. Zou and D. Ozturk and R. Varney and A. Reimer",
  title = "Effects of sudden commencement on the ionosphere: PFISR observations and global MHD simulation",
  year =  2017 ,
  journal = "Geophys. Res. Lett.",
  number = 44,
  keywords = "pfisr, pfrr",
  doi = "10.1002/2017GL072678",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL072678"
}


@article{Wu2017a,
  author = "Q. Wu and G. Jee and C. Lee and J.-H. Kim and Y. H. Kim and W. Ward and R. H. Varney",
  title = "First simultaneous multistation observations of the polar cap thermospheric winds",
  year =  2017 ,
  journal = "J. Geophys. Res. Space Physics",
  publisher = "American Geophysical Union",
  volume = 122,
  keywords = "risrn, rbo",
  doi = "10.1002/2016JA023560",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JA023560"
}


@article{Shen2016a,
  author = "Y. Shen and D. J. Knudsen and J. K. Burchill and A. Howarth and A. Yau and R. J. Redmon and D. M. Miles and R. H. Varney and M. J. Nicolls",
  title = "Strong ambipolar-driven ion upflow within the cleft ion fountain during low geomagnetic activity",
  year =  2016 ,
  journal = "J. Geophys. Res. Space Physics",
  number = 121,
  keywords = "risrn",
  doi = "10.1002/2016JA022532",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JA022532"
}


@article{Koustov2016a,
  author = "A. V. Koustov and D. B. Lavoie and R. H. Varney",
  title = "On the consistency of the SuperDARN radar velocity and E×B plasma drift",
  year =  2016 ,
  journal = "Radio Science",
  publisher = "American Geophysical Union",
  number = 51,
  keywords = "risrn",
  doi = "10.1002/2016RS006134",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016RS006134"
}


@article{Hickey2015a,
  author = "D. A. Hickey and C. R. Martinis and F. S. Rodrigues and R. H. Varney and M. A. Milla and M. J. Nicolls and A. Strømme and J. F. Arratia",
  title = "Concurrent observations at the magnetic equator of small-scale irregularities and large-scale depletions associated with equatorial spread F",
  year =  2015 ,
  journal = "J. Geophys. Res.",
  volume = 120,
  pages = "10883-10896",
  keywords = "amisr, jro-14",
  doi = "10.1002/2015JA021991"
}


@article{Rodrigues.2015a,
  author = "F. S. Rodrigues. and M. J. Nicolls and M. A. Milla and J. M. Smith and R. H. Varney and A. Strømme and C. Martinis and J. F. Arratia",
  title = "AMISR-14: Observations of equatorial spread F",
  year =  2015 ,
  journal = "Geophys. Res. Lett.",
  volume = 42,
  pages = "5100-5108",
  keywords = "amisr, jro-14",
  doi = "10.1002/2015GL064574"
}


@article{Varney2014a,
  author = "R. H. Varney and S. C. Solomon and M. J. Nicolls",
  title = "Heating of the sunlit polar cap ionosphere by reflected photoelectrons",
  year =  2014 ,
  journal = "J. Geophys. Res.",
  volume = 119,
  pages = "8660-8684",
  keywords = "amisr, risrn",
  doi = "10.1002/2013JA019378"
}


@article{Varney2011a,
  author = "R. H. Varney and M. C. Kelley and M. J. Nicolls and C. J. Heinselman and R. L. Collins",
  title = "The electron density dependence of polar mesospheric summer echoes",
  year =  2011 ,
  journal = "J Atmos Sol-Terr Phy",
  volume = 73,
  keywords = "amisr, pfisr",
  doi = "10.1016/j.jastp.2010.07.020"
}


@article{Kelley2010a,
  author = "M. C. Kelley and M. J. Nicolls and R. H. Varney and R. L. Collins and R. Doe and J. M. C. Plane and J. Thayer and M. Taylor and B. Thurairajah and K. Mizutani",
  title = "Radar, lidar, and optical observations in the polar summer mesosphere shortly after a space shuttle launch",
  year =  2010 ,
  journal = "J. Geophys. Res.",
  volume = 115,
  keywords = "amisr, pfisr, pfrr, sondrestrom",
  doi = "10.1029/2009JA014938"
}


@article{Nicolls2010a,
  author = "M. J. Nicolls and R. H. Varney and S. L. Vadas and P. A. Stamus and C. J. Heinselman and R. B. Cosgrove and M. C. Kelley",
  title = "Influence of an inertia-gravity wave on mesospheric dynamics: A case study with the Poker Flat Incoherent Scatter Radar",
  year =  2010 ,
  journal = "J. Geophys. Res.",
  volume = 115,
  keywords = "amisr, pfisr",
  doi = "10.1029/2010JD014042"
}


@article{Varney2009a,
  author = "R. H. Varney and M. J. Nicolls and C. J. Heinselman and M. C. Kelley",
  title = "Observations of polar mesospheric summer echoes using PFISR during the summer of 2007",
  year =  2009 ,
  journal = "J. Atmos. Solar-Terr. Phys.",
  volume = 71,
  number = 3,
  pages = "470-476",
  keywords = "amisr, pfisr",
  doi = "10.1016/j.jastp.2009.01.002"
}


@article{Taylor2009a,
  author = "M. J. Taylor and Y. Zhao and P.-D. Pautet and M. J. Nicolls and R. L. Collins and J. Barker-Tvedtnes and C. D. Burton and B. Thurairajah and J. Reimuller and R. H. Varney and C. J. Heinselman and K. Mizutani",
  title = "Coordinated optical and radar image measurements of noctilucent clouds and polar mesospheric summer echoes",
  year =  2009 ,
  journal = "J. Atmos. Solar-Terr. Phys.",
  volume = 71,
  number = 6,
  pages = "675-687",
  keywords = "amisr, pfisr, pfrr",
  doi = "10.1016/j.jastp.2008.12.005"
}


@article{Nicolls2009a,
  author = "M. J. Nicolls and M. C. Kelley and R. H. Varney and C. J. Heinselman",
  title = "Spectral observations of polar mesospheric summer echoes at 33 cm (450 MHz) with the Poker Flat Incoherent Scatter Radar",
  year =  2009 ,
  journal = "J. Atmos Solar-Terr. Phys.",
  volume = 71,
  number = 6,
  pages = "662-674",
  keywords = "amisr, pfisr",
  doi = "10.1016/j.jastp.2008.04.019"
}