@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"
}


@mastersthesis{Beever2021a,
  author = "Z. Beever",
  title = "QUANTIFYING LOSS OF CURRENT SHEET SCATTERED ELECTRONS DURING THE SUBSTORM GROWTH PHASE",
  year =  2021 ,
  keywords = "pfisr, themis, mastersthesis",
  url = "https://hdl.handle.net/2144/42586",
  school = "Boston University"
}


@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"
}


@mastersthesis{Larson2021a,
  author = "B. Larson",
  title = "Comparative study of polar cap electron density measurements and E-CHAIM modeling",
  year =  2021 ,
  month = "Dec",
  keywords = "risrn, risrc, swarm satellites, e-chaim model, mastersthesis",
  url = "https://hdl.handle.net/10388/13751",
  school = "University of Saskatchewan"
}


@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{Ma2021a,
  author = "Y.-Z. Ma and Q.-H. Zhang and L. R. Lyons and J. Liu and Z.-Y. Xing and A. Reimer and Y. Nishimura and D. Hampton",
  title = "Is Westward Travelling Surge Driven by the Polar Cap Flow Channels?",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 8,
  keywords = "pfisr, pfrr",
  doi = "https://doi.org/10.1029/2020JA028498",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028498",
  note = "e2020JA028498 2020JA028498"
}


@article{Makarevich2021a,
  author = "R. A. Makarevich and G. Crowley and I. Azeem and C. Ngwira and V. V. Forsythe",
  title = "Auroral E-Region as a Source Region for Ionospheric Scintillation",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 5,
  month = "May",
  keywords = "pfisr",
  doi = "https://doi.org/10.1029/2021JA029212",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JA029212",
  note = "e2021JA029212 2021JA029212"
}


@article{St-Maurice2021a,
  author = "J.-P. St-Maurice and L. Goodwin",
  title = "Revisiting the Behavior of the E-Region Electron Temperature During Strong Electric Field Events at High Latitudes",
  year =  2021 ,
  journal = "Journal of Geophysical Research: Space Physics",
  volume = 126,
  number = 2,
  keywords = "risrn",
  doi = "https://doi.org/10.1029/2020JA028288",
  url = "https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028288",
  note = "2020JA028288 2020JA028288"
}


@article{Wang2021a,
  author = "Y. Wang and P. T. Jayachandran and D. R. Themens and A. M. McCaffrey and Q.-H. Zhang and S. David and R. Chadwick",
  title = "A Case Study of Polar Cap Sporadic-E Layer Associated with TEC Variations",
  year =  2021 ,
  journal = "Remote Sensing",
  volume = 13,
  number = 7,
  keywords = "risrn, polar cap, sporadic e-layer, rbo, tec variations, scintillation",
  doi = "10.3390/rs13071324",
  url = "https://www.mdpi.com/2072-4292/13/7/1324"
}


@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{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{Zou2021a,
  author = "S. Zou and J. Ren and Z. Wang and H. Sun and Y. Chen",
  title = "Impact of Storm-Enhanced Density (SED) on Ion Upflow Fluxes During Geomagnetic Storm",
  year =  2021 ,
  journal = "Frontiers in Astronomy and Space Sciences",
  volume = 8,
  keywords = "pfisr",
  doi = "10.3389/fspas.2021.746429",
  url = "https://www.frontiersin.org/articles/10.3389/fspas.2021.746429"
}