selected publications

• conference proceeding

  • Middle-Latitude Ionospheric Irregularities and Scintillation during Geomagnetic Storms.  1657-1663. 2016
  • A case study comparing citizen science aurora data with global auroral boundaries derived from satellite imagery and empirical models.  Journal of Atmospheric and Solar: Terrestrial Physics. 274-282. 2016
  • Customers and Requirements for Ionosphere Products and Services.  Geophysical Monograph. 299-307. 2011
  • Comparing Estimates of the Mg II Index at Solar Minimum from 1961 through 1981 with the Observed Mg II Index from 1978 to Present.  315-+. 2009
  • Report on GOES SXI/XRS calibration effort - art. no. 66890J.  Proceedings of SPIE. J6890-J6890. 2007
  • Solar extreme ultraviolet irradiance observations from GOES: Design characteristics and initial performance.  Proceedings of SPIE. 2007
  • Solar cycle effects on thermospheric density and satellite drag.  Advances in the Astronautical Sciences. 1193-1208. 1999

• journal article

  • The GOES-R EUVS model for EUV irradiance variability.  Journal of Space Weather and Space Climate. 2019
  • An Improved Lyman-Alpha Composite.  Earth and Space Science. 2263-2272. 2019
  • A Revised Magnesium II Core-to-Wing Ratio From SORCE SOLSTICE.  Earth and Space Science. 2106-2114. 2019
  • Quantifying the Sources of Ionosphere Day-To-Day Variability.  Journal of Geophysical Research: Space Physics. 9682-9696. 2018
  • Solar Ultraviolet Irradiance Observations of the Solar Flares During the intense September 2017 Storm Period.  Space Weather. 1470-1487. 2018
  • The Reported Durations of GOES Soft X-Ray Flares in Different Solar Cycles.  Space Weather. 660-666. 2018
  • New Solar Irradiance Measurements from the Miniature X-Ray Solar Spectrometer Cubesat.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 2017
  • Using citizen science reports to define the equatorial extent of auroral visibility.  Space Weather. 198-209. 2016
  • Solar Spectral Proxy Irradiance from GOES (SSPRING): a model for solar EUV irradiance.  Journal of Space Weather and Space Climate. 2016
  • Comparison of Magnesium II core-to-wing ratio observations during solar minimum 23/24.  Journal of Space Weather and Space Climate. 2014
  • Identification and replacement of proton-contaminated real-time ACE solar wind measurements.  Space Weather. 434-440. 2013
  • Evaluation of OVATION Prime as a forecast model for visible aurorae.  Space Weather. 2012
  • Extreme Ultraviolet Variability Experiment (EVE) on the Solar Dynamics Observatory (SDO): Overview of Science Objectives, Instrument Design, Data Products, and Model Developments.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 115-143. 2012
  • Some Characteristics of the Ionospheric Behavior During the Solar Cycle 23-24 Minimum.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 439-456. 2011
  • Did the January 2009 sudden stratospheric warming cool or warm the thermosphere?.  Geophysical Research Letters. 2011
  • Causes of low thermospheric density during the 2007-2009 solar minimum.  Journal of Geophysical Research: Space Physics. 2011
  • Early Observations by the GOES-13 Solar Extreme Ultraviolet Sensor (EUVS).  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 71-115. 2010
  • A new method for studying the thermospheric density variability derived from CHAMP/STAR accelerometer data for magnetically active conditions.  Annales Geophysicae: atmospheres, hydrospheres and space sciences. 1949-1958. 2007
  • The October 28, 2003 extreme EUV solar flare and resultant extreme ionospheric effects: Comparison to other Halloween events and the Bastille Day event.  Geophysical Research Letters. 2005
  • A composite Mg II index spanning from 1978 to 2003.  Space Weather. 2004
  • Calibration of an extreme-ultraviolet transmission grating spectrometer with synchrotron radiation.  Applied Optics. 1623-1630. 2001
  • The MgII Index: A proxy for solar EUV.  Geophysical Research Letters. 1343-1346. 2001
  • The SOLAR2000 empirical solar irradiance model and forecast tool.  Journal of Atmospheric and Solar: Terrestrial Physics. 1233-1250. 2000