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principal investigator; aeronomer; space scientist
240-228-6871
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ph.d., astrophysical, planetary and atmospheric sciences1983, university of colorado - boulder
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m.s., astrophysical, planetary and atmospheric sciences1982, university of colorado - boulder
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b.s., physics1976, santa clara university
LARRY J. PAXTON is a member of the Principal Professional Staff at the Johns Hopkins University Applied Physics Laboratory (JHU/APL) and Chief Scientist for Geospace. He is the Past President of the American Geophysical Union Space Physics and Aeronomy Section; this is the world's largest association of scientists studying space weather and space physics. Dr. Paxton is the Principal Investigator or PI on 7 instruments that have flown in space. His research interests include space science, space technology, satellite- and ground-based mission design, the implications of global climate change for the stability of nations; and innovation. He is particularly interested in new instruments that characterize the geospace environment. He has published over 300 scientific/technical papers on these subjects.He holds one patent. He earned his Ph.D in Astrophysical, Planetary, and Atmospheric Sciences from the University of Colorado in Boulder. He is an Academician member of the International Academy of Astronautics. He is also a member of the National Academies Space Studies Board. Awards include JHU/APL publication of the Year Awards in 2014, 2004, and 1992; JHU/APL Government Purpose Invention of the Year Nominee 2020, 2019, 2017, 2015, 2011, and 2010; Best Paper – 7th IAA Symposium on Small Satellites for Earth Observation 2009 NRC experience includes: National Academies Workshop on Space Weather (2020); National Research Council Meeting of Experts on the “The Role of High-Power, High Frequency-Band Transmitters in Advancing Ionospheric/Thermospheric Research” 2013; NRC Panel Member: Meeting of Experts: Towards the Use of Lower-Cost Platforms for the Acquisition of Environmental Data from Space 2011; National Academy of Sciences Solar Variability and Climate Change Panel 2011-2013; National Academy of Sciences/National Research Council Decadal Survey Panel for Heliophysics 2010-2012. Other recent relevant experience includes JHU’s Global Water Institute Board and the Executive Board of JHU’s Earth Environment Sustainability and Health Institute (2013-) as well as the NASA Heliophysics Roadmap Committee (2012-2015); NSF Aeronomy Review Panel (2013) and NSF Aeronomy Committee of Visitors; Chair of IAA Commission 4 and Small Satellite Program Committee. Member of the National Academies Space Studies Board (2016-present). He was recently selected to participate on the Heliophysics 2050 activity for NASA. He is the Principal Investigator for the Air Force DMSP program SSUSI instrument and co-PI for the NASA TIMED missions Global Ultraviolet Imager (GUVI).
Notable Awards and Leadership
| Year(s) | Description |
|---|---|
| 2017 - Present | President - American Geophysical Union Space Physics and Aeronomy |
| 2016 - Present | National Academies Space Studies Board |
| 2013 - Present | JHU Earth Environment Sustainability and Health Institute Executive Committee |
| 2015 - 2017 | Vice President - American Geophysical Union Space Physics and Aeronomy |
| 2013 - 2015 | Secretary -- American Geophysical Union Space Physics and Aeronomy |
| 2012 - 2014 | NASA Heliophysics Roadmap |
| 2012 | Letter of Commendation from Senator Barbara Mikulski for GAIA: Global Assimilation of Information for Action |
| 2011 - 2012 | NRC Heliophysics Decadal Survey |
| 2015, 2011, 2010 | APL Government Purpose Invention Award Nominee |
| 2009 | Best paper - 7th IAA Symposium on Small Satellites for Earth Observation |
| 2005 | Academician Member of the International Academy of Astronautics |
| 2014, 2004, 1992 | APL Publication Award |
Scholarly Publications
Doppler Shifted Auroral Hydrogen Lyman‐Alpha Spectra Observed by DMSP/SSUSI
Geophysical Research Letters, 2024
STEVE Events With FUV Emissions
Journal of Geophysical Research: Space Physics, 2024
Ionospheric response over Thailand from the 15 January 2022 eruption of the Hunga Tonga-Hunga Ha'apai volcano
2024
Fine‐Scale Electric Fields and Joule Heating From Observations of the Aurora
Journal of Geophysical Research: Space Physics, 2023
Mean Energy Flux, Associated Derived Height‐Integrated Conductances, and Field‐Aligned Current Magnitudes Evolve Differently During a Substorm
Journal of Geophysical Research: Space Physics, 2023
The association of cusp-aligned arcs with plasma in the magnetotail implies a closed magnetosphere
2023
Formation and Motion of Horse Collar Aurora Events
Journal of Geophysical Research: Space Physics, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)
Bulletin of the AAS, 2023
The Association of Cusp‐Aligned Arcs With Plasma in the Magnetotail Implies a Closed Magnetosphere
Journal of Geophysical Research: Space Physics, 2023
Impact of Storm‐Time Enhanced O2 Absorption on Disk Viewing N2 LBH Spectra: TIMED GUVI Observations
Geophysical Research Letters, 2023
On the Creation, Depletion, and End of Life of Polar Cap Patches
Journal of Geophysical Research: Space Physics, 2023
Transpolar Arcs: Seasonal Dependence Identified by an Automated Detection Algorithm
Journal of Geophysical Research: Space Physics, 2022
Investigating Geocoronal Absorption for Wavelength Calibration of Sounding Rockets
2022
Occurrence statistics of horse collar aurora
2022
Two different properties of ionospheric perturbations detected in the vicinity of the Korean Peninsula after the Hunga-Tonga volcanic eruption on 15 January 2022
2022
The Origin of Midlatitude Plasma Depletions Detected During the 12 February 2000 and 29 October 2003 Geomagnetic Storms
Journal of Geophysical Research: Space Physics, 2022
Lobe Reconnection and Cusp‐Aligned Auroral Arcs
Journal of Geophysical Research: Space Physics, 2022
Occurrence Statistics of Horse Collar Aurora
Journal of Geophysical Research: Space Physics, 2022
Detection of Different Properties of Ionospheric Perturbations in the Vicinity of the Korean Peninsula After the Hunga‐Tonga Volcanic Eruption on 15 January 2022
Geophysical Research Letters, 2022
Height-integrated conductance and field-aligned current magnitudes evolve differently during a substorm
2022
Large‐Scale Traveling Atmospheric and Ionospheric Disturbances Observed in GUVI With Multi‐Instrument Validations
Geophysical Research Letters, 2022
Thermospheric Conditions Associated With the Loss of 40 Starlink Satellites
Space Weather, 2022
Simultaneous Detection of Signatures of Conjugate Photoelectrons in the Ionosphere and Thermosphere
Journal of Geophysical Research: Space Physics, 2022
Formation and motion of horse collar aurora events
2022
Solar Cycle, Seasonal, and Dawn‐To‐Dusk Variations of the Hydrogen in the Upper Thermosphere
Journal of Geophysical Research: Space Physics, 2022
On the Creation, Depletion, and End of Life of Polar Cap Patches
2022
Thermospheric ionization from auroral particle precipitation observed by the SSUSI satellite instruments
2021
Global Distribution of Nighttime MSTIDs and Its Association With E Region Irregularities Seen by CHAMP Satellite
Journal of Geophysical Research: Space Physics, 2021
FTA: A Feature Tracking Empirical Model of Auroral Precipitation
Space Weather, 2021
Large‐Scale Dune Aurora Event Investigation Combining Citizen Scientists' Photographs and Spacecraft Observations
AGU Advances, 2021
Field-aligned current during an interval of $\rm B_{Y}$-dominated interplanetary-field; modeled-to-observed comparisons
2021
Impact of September 2019 Antarctic Sudden Stratospheric Warming on Mid‐Latitude Ionosphere and Thermosphere Over North America and Europe
Geophysical Research Letters, 2021
Periodic Variations in Solar Wind and Responses of the Magnetosphere and Thermosphere in March 2017
Journal of Geophysical Research: Space Physics, 2021
Transpolar arcs: Seasonal dependence identified by an automated detection algorithm
2021
Ionospheric and Thermospheric Contributions in TIMED/GUVI O 135.6 nm Radiances
Journal of Geophysical Research: Space Physics, 2021
Dual-lobe reconnection and cusp-aligned auroral arcs
2021
Field‐Aligned Current During an Interval of BY‐Dominated Interplanetary‐Field; Modeled‐to‐Observed Comparisons
Journal of Geophysical Research: Space Physics, 2021
SIHLA , a Mission of Opportunity to L1 to Map H Lyman Alpha Emissions from the Heliopause, the Interplanetary Medium, the Earth's Geocorona and Comets
2020
The Evolution of Long‐Duration Cusp Spot Emission During Lobe Reconnection With Respect to Field‐Aligned Currents
Journal of Geophysical Research: Space Physics, 2020
Magnetospheric Conditions for STEVE and SAID: Particle Injection, Substorm Surge, and Field‐Aligned Currents
Journal of Geophysical Research: Space Physics, 2020
Multiscale Observation of Two Polar Cap Arcs Occurring on Different Magnetic Field Topologies
Journal of Geophysical Research: Space Physics, 2020
Dual-lobe reconnection and horse-collar auroras
2020
Origin and Distribution of Daytime Electron Density Irregularities in the Low‐Latitude F Region
Journal of Geophysical Research: Space Physics, 2020
Impacts of Lower Thermospheric Atomic Oxygen on Thermospheric Dynamics and Composition Using the Global Ionosphere Thermosphere Model
Journal of Geophysical Research: Space Physics, 2020
Height‐Integrated Ionospheric Conductances Parameterized By Interplanetary Magnetic Field and Substorm Phase
Journal of Geophysical Research: Space Physics, 2020
Solving the Space Weather Problem: A 15+ Year Roadmap to Revolutionize Space Weather Research, Protect NASA Space Assets, and Enable Robust Operations
2020
Dual‐Lobe Reconnection and Horse‐Collar Auroras
Journal of Geophysical Research: Space Physics, 2020
Deriving Thermospheric Temperature From Observations by the Global Ultraviolet Imager on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics Satellite
Journal of Geophysical Research: Space Physics, 2019
Plasma Blobs Associated With Medium‐Scale Traveling Ionospheric Disturbances
Geophysical Research Letters, 2019
Critical Issues in Ionospheric Data Quality and Implications for Scientific Studies
Radio Science, 2019
Daytime Evolution of Equatorial Plasma Bubbles Observed by the First Republic of China Satellite
Geophysical Research Letters, 2019
Solar EUV Flux Proxy Using Multifrequency Solar Radio Flux
Space Weather, 2018
The Association of High‐Latitude Dayside Aurora With NBZ Field‐Aligned Currents
Journal of Geophysical Research: Space Physics, 2018
Interhemispheric Survey of Polar Cap Aurora
Journal of Geophysical Research: Space Physics, 2018
Introduction to NASA Living With a Star Institute Special Section on Low Earth Orbit Satellite Drag: Science and Operational Impact
Space Weather, 2018
Tropical Ionization Trough in the Ionosphere Seen by Swarm‐A Satellite
Geophysical Research Letters, 2018
Global Distribution of Nighttime Medium‐Scale Traveling Ionospheric Disturbances Seen by Swarm Satellites
Geophysical Research Letters, 2017
Revisiting Ionosphere-Thermosphere Responses to Solar Wind Driving in Superstorms of November 2003 and 2004
Journal of Geophysical Research: Space Physics, 2017
Far ultraviolet instrument technology
Journal of Geophysical Research: Space Physics, 2017
Multi‐instrument observation of simultaneous polar cap auroras on open and closed magnetic field lines
Journal of Geophysical Research: Space Physics, 2017
Transpolar arcs observed simultaneously in both hemispheres
Journal of Geophysical Research: Space Physics, 2017
Ionospheric‐thermospheric UV tomography: 3. A multisensor technique for creating full‐orbit reconstructions of atmospheric UV emission
Radio Science, 2017
Auroral Arcs and Ion Outflow
Auroral Dynamics and Space Weather, 2016
Auroral Dynamics and Space Weather
Auroral Dynamics and Space Weather, 2016
Auroral Dynamics and Space Weather Preface
Auroral Dynamics and Space Weather, 2016
Auroral Kilometric Radiation: Polarization and Spectra Observed Far from Earth
Auroral Dynamics and Space Weather, 2016
Sustaining Innovation
Infusing Innovation Into Organizations, 2016
Leading Innovation into the Future
Infusing Innovation Into Organizations, 2016
Auroral Precipitation Models and Space Weather
Auroral Dynamics and Space Weather, 2016
Dynamics of the Dayside Aurora as Viewed from the South Pole
Auroral Dynamics and Space Weather, 2016
Dynamics Related to Plasmasheet Flow Bursts as Revealed from the Aurora
Auroral Dynamics and Space Weather, 2016
Equatorial broad plasma depletions associated with the evening prereversal enhancement and plasma bubbles during the 17 March 2015 storm
Journal of Geophysical Research-Space Physics, 2016
GPS Phase Scintillation at High Latitudes during Two Geomagnetic Storms
Auroral Dynamics and Space Weather, 2016
Interhemispheric Symmetries and Asymmetries of Aurora from Ground-Based Conjugate Observations
Auroral Dynamics and Space Weather, 2016
Inverted-V Auroral Arcs and Alfven Waves
Auroral Dynamics and Space Weather, 2016
Investigations of the Many Distinct Types of Auroras
Auroral Dynamics and Space Weather, 2016
Ionospheric data assimilation and forecasting during storms
Journal of Geophysical Research-Space Physics, 2016
Imaging the near-Earth space environment
SPIE Newsroom, 2016
Isolated Proton Auroras and Pc1/EMIC Waves at Subauroral Latitudes
Auroral Dynamics and Space Weather, 2016
Magnetospheric Substorm Onset by Current Disruption Processes
Auroral Dynamics and Space Weather, 2016
Mechanisms that Produce Auroral Asymmetries in Conjugate Hemispheres
Auroral Dynamics and Space Weather, 2016
Observation and modeling of the South Atlantic Anomaly in low Earth orbit using photometric instrument data
Space Weather-the International Journal of Research and Applications, 2016
Polar cap arcs: Sun-aligned or cusp-aligned?
Journal of Atmospheric and Solar-Terrestrial Physics, 2016
Quasiperiodic Aurora: Outstanding Problems and Recent Results
Auroral Dynamics and Space Weather, 2016
Radio Absorption in Auroral Region
Auroral Dynamics and Space Weather, 2016
Reply to comment by Kil et al. on "The night when the auroral and equatorial ionospheres converged"
Journal of Geophysical Research-Space Physics, 2016
Role of Multiple Atmospheric Reflections in Formation of Electron Distribution Function in the Diffuse Aurora Region
Auroral Dynamics and Space Weather, 2016
SSUSI-Lite: Next generation far-ultraviolet sensor for characterizing geospace
Electro-Optical and Infrared Systems: Technology and Applications Xiii, 2016
Scintillation and irregularities from the nightside part of a Sun-aligned polar cap arc
Journal of Geophysical Research-Space Physics, 2016
Solar flare impact on FUV based thermospheric O/N-2 estimation
Journal of Atmospheric and Solar-Terrestrial Physics, 2016
Solar wind driving of ionosphere-thermosphere responses in three storms near St. Patrick's Day in 2012, 2013, and 2015
Journal of Geophysical Research-Space Physics, 2016
Space Weather Products and Tools Used in Auroral Monitoring and Forecasting at CCMC/SWRC
Auroral Dynamics and Space Weather, 2016
Structures in Polar Rain Auroras
Auroral Dynamics and Space Weather, 2016
Substorm Auroral Dynamics Reproduced by Advanced Global Magnetosphere-Ionosphere (M-I) Coupling Simulation
Auroral Dynamics and Space Weather, 2016
The Radar Aurora
Auroral Dynamics and Space Weather, 2016
Auroral Dynamics and Space Weather
2015
Structures in Polar Rain Auroras
Auroral Dynamics and Space Weather, 2015
Auroral Precipitation Models and Space Weather
Auroral Dynamics and Space Weather, 2015
Morphology of the postsunset vortex in the equatorial ionospheric plasma drift
Geophysical Research Letters, 2015
Explaining solar cycle effects on composition as it relates to the winter anomaly
Journal of Geophysical Research-Space Physics, 2015
Impacts of CME-induced geomagnetic storms on the midlatitude mesosphere and lower thermosphere observed by a sodium lidar and TIMED/GUVI
Geophysical Research Letters, 2015
Remote Sensing of Earth's Limb by TIMED/GUVI: Retrieval of thermospheric composition and temperature
Earth and Space Science, 2015
SSUSI-Lite: A far-ultraviolet hyper-spectral imager for space weather remote sensing
Solar Physics and Space Weather Instrumentation Vi, 2015
The August 2011 URSI World Day campaign: Initial results
Journal of Atmospheric and Solar-Terrestrial Physics, 2015
The night when the auroral and equatorial ionospheres converged
Journal of Geophysical Research-Space Physics, 2015
Equatorial broad plasma depletions associated with the enhanced fountain effect
Journal of Geophysical Research-Space Physics, 2014
Ionospheric TEC, thermospheric cooling and Sigma[O/N-2] compositional changes during the 6-17 March 2012 magnetic storm interval (CAWSES II)
Journal of Atmospheric and Solar-Terrestrial Physics, 2014
OVATION Prime-2013: Extension of auroral precipitation model to higher disturbance levels
Space Weather-the International Journal of Research and Applications, 2014
On the solar cycle variation of the winter anomaly
Journal of Geophysical Research-Space Physics, 2014
Progress toward forecasting of space weather effects on UHF SATCOM after Operation Anaconda
Space Weather-the International Journal of Research and Applications, 2014
Solar filament impact on 21 January 2005: Geospace consequences
Journal of Geophysical Research-Space Physics, 2014
Storm-time behaviors of O/N-2 and NO variations
Journal of Atmospheric and Solar-Terrestrial Physics, 2014
The zonal motion of equatorial plasma bubbles relative to the background ionosphere
Journal of Geophysical Research-Space Physics, 2014
Empirical relationship between electron precipitation and far-ultraviolet auroral emissions from DMSP observations
Journal of Geophysical Research-Space Physics, 2013
Large-scale structures in the Polar Rain
Geophysical Research Letters, 2013
Multi-Periodic Auroral and Thermospheric Variations in 2006
Terrestrial Atmospheric and Oceanic Sciences, 2013
Nightside midlatitude ionospheric arcs: TIMED/GUVI observations
Journal of Geophysical Research-Space Physics, 2013
Far Ultraviolet Remote Sensing of Venus and Mars
Venus and Mars: Atmospheres, Ionospheres, and Solar Wind Interactions, 2013
Reply to comment on "Empirical relationship between electron precipitation and far-ultraviolet auroral emissions from DMSP observations"
Journal of Geophysical Research-Space Physics, 2013
Statistical comparison of isolated and non-isolated auroral substorms
Journal of Geophysical Research-Space Physics, 2013
The effect of geomagnetic-storm-induced enhancements to ionospheric emissions on the interpretation of the TIMED/GUVI O/N-2 ratio
Journal of Geophysical Research-Space Physics, 2013
The effect of the 135.6nm emission originated from the ionosphere on the TIMED/GUVI O/N-2 ratio
Journal of Geophysical Research-Space Physics, 2013
The quiet nighttime low-latitude ionosphere as observed by TIMED/GUVI
Advances in Space Research, 2013
Daytime climatology of ionospheric NmF2 and h(m)F(2) from COSMIC data
Journal of Geophysical Research-Space Physics, 2012
Ionospheric and thermospheric variations associated with prompt penetration electric fields
Journal of Geophysical Research-Space Physics, 2012
Persistent longitudinal features in the low-latitude ionosphere
Journal of Geophysical Research-Space Physics, 2012
Reply to comment by DJ Strickland et al. on "Long-term variation in the thermosphere: TIMED/GUVI observations"
Journal of Geophysical Research-Space Physics, 2012
The Global Assimilation of Information for Action (GAIA) Initiative: Understanding the Impact of Climate Change on National Security and Public Health
Sensing Technologies For Global Health, Military Medicine, Disaster Response, and Environmental Monitoring Ii: and Biometric Technology For Human Identification Ix, 2012
A study of space shuttle plumes in the lower thermosphere
Journal of Geophysical Research-Space Physics, 2011
Causal Link of Longitudinal Plasma Density Structure to Vertical Plasma Drift and Atmospheric Tides - A Review
Aeronomy of the Earth's Atmosphere and Ionosphere, 2011
Ionospheric electron content and NmF2 from nighttime OI 135.6 nm intensity
Journal of Geophysical Research-Space Physics, 2011
Long-term variation in the thermosphere: TIMED/GUVI observations
Journal of Geophysical Research-Space Physics, 2011
Longitudinal variations of nighttime electron auroral precipitation in both the Northern and Southern hemispheres from the TIMED global ultraviolet imager
Journal of Geophysical Research-Space Physics, 2011
Nightside polar rain aurora boundary gap and its applications for magnetotail reconnection
Journal of Geophysical Research-Space Physics, 2011
O and N-2 disturbances in the F region during the 20 November 2003 storm seen from TIMED/GUVI
Journal of Geophysical Research-Space Physics, 2011
Onset conditions of bubbles and blobs: A case study on 2 March 2009
Geophysical Research Letters, 2011
Reversed two-cell convection in the Northern and Southern hemispheres during northward interplanetary magnetic field
Journal of Geophysical Research-Space Physics, 2011
Space Technology 5 multipoint observations of transpolar arc-related field-aligned currents
Journal of Geophysical Research-Space Physics, 2011
Temporal and spatial components in the storm-time ionospheric disturbances
Journal of Geophysical Research-Space Physics, 2011
The O I 135.6 nm airglow observations of the midlatitude summer nighttime anomaly by TIMED/GUVI
Journal of Geophysical Research-Space Physics, 2011
The origin of the nonmigrating tidal structure in the column number density ratio of atomic oxygen to molecular nitrogen
Geophysical Research Letters, 2011
The source of the longitudinal asymmetry in the ionospheric tidal structure
Journal of Geophysical Research-Space Physics, 2011
TIMED/GUVI observation of solar illumination effect on auroral energy deposition
Journal of Geophysical Research-Space Physics, 2011
Auroral and thermospheric response to the 9 day periodic variations in the dayside reconnection rate in 2005
Space Weather-the International Journal of Research and Applications, 2010
Can molecular diffusion explain Space Shuttle plume spreading?
Geophysical Research Letters, 2010
Canary - Ion Spectroscopy for Ionospheric Sensing
Space Missions and Technologies, 2010
Coordinated UV imaging of equatorial plasma bubbles using TIMED/GUVI and DMSP/SSUSI
Space Weather-the International Journal of Research and Applications, 2010
Global Ultraviolet Imager equatorial plasma bubble imaging and climatology, 2002-2007
Journal of Geophysical Research-Space Physics, 2010
Ionospheric response to the initial phase of geomagnetic storms: Common features
Journal of Geophysical Research-Space Physics, 2010
Is DE2 the source of the ionospheric wave number 3 longitudinal structure?
Journal of Geophysical Research-Space Physics, 2010
Near real-time assimilation in IRI of auroral peak E-region density and equatorward boundary
Advances in Space Research, 2010
Seasonal and hemispheric variations of the total auroral precipitation energy flux from TIMED/GUVI
Journal of Geophysical Research-Space Physics, 2010
Small Satellite Constellations for Measurements of the Near-Earth Space Environment
Small Satellite Missions For Earth Observation, 2010
The temporal evolution of the large equatorial plasma depletions observed during the 29-30 October 2003 storm
Journal of Atmospheric and Solar-Terrestrial Physics, 2010
Thermospheric composition variations due to nonmigrating tides and their effect on ionosphere
Geophysical Research Letters, 2010
Does the polar cap disappear under an extended strong northward IMF?
Journal of Atmospheric and Solar-Terrestrial Physics, 2009
3-D Ionospheric Electron Density Reconstructions and Radio Propagation Modeling Using DMSP/SSUSI
1st AIAA Atmospheric and Space Environments Conference, 2009
Space Archaeology and Science Fiction
Handbook of Space Engineering, Archaeology, and Heritage, 2009
Effects observed in the Latin American sector ionospheric F region during the intense geomagnetic disturbances in the early part of November 2004
Journal of Geophysical Research-Space Physics, 2009
Equatorial and low-latitude ionosphere-thermosphere system response to the space weather event of August 2005
Journal of Geophysical Research-Space Physics, 2009
Formation of a plasma depletion shell in the equatorial ionosphere
Journal of Geophysical Research-Space Physics, 2009
Global bubble distribution seen from ROCSAT-1 and its association with the evening prereversal enhancement
Journal of Geophysical Research-Space Physics, 2009
High-resolution vertical E x B drift model derived from ROCSAT-1 data
Journal of Geophysical Research-Space Physics, 2009
The 27-day modulation of the low-latitude ionosphere during a solar maximum
Journal of Geophysical Research-Space Physics, 2009
Unusual declining phase of solar cycle 23: Weak semi-annual variations of auroral hemispheric power and geomagnetic activity
Geophysical Research Letters, 2009
A Data-Model Comparative Study of Ionospheric Positive Storm Phase in the Midlatitude F Region
Midlatitude Ionospheric Dynamics and Disturbances, 2008
Abnormal vertical drifts of equatorial plasma before dawn and after sunset during the storm of 29-30 October 2003
Geophysical Research Letters, 2008
An empirical Kp-dependent global auroral model based on TIMED/GUVI FUV data
Journal of Atmospheric and Solar-Terrestrial Physics, 2008
Anomalous enhancement of ionospheric electron content in the Asian-Australian region during a geomagnetically quiet day
Journal of Geophysical Research-Space Physics, 2008
Comparison of Global Ultraviolet Imager limb and disk observations of column O/N-2 during a geomagnetic storm
Journal of Geophysical Research-Space Physics, 2008
Effects of solar activity variations on the low latitude topside nighttime ionosphere
Advances in Space Research, 2008
Evidence for significantly greater N(2) Lyman-Birge-Hopfield emission efficiencies in proton versus electron aurora based on analysis of coincident DMSP SSUSI and SSJ/5 data
Journal of Geophysical Research-Space Physics, 2008
Interplanetary shock induced ring current auroras
Journal of Geophysical Research-Space Physics, 2008
Ionosphere disturbances observed throughout Southeast Asia of the superstorm of 20-22 November 2003
Journal of Geophysical Research-Space Physics, 2008
Periodic modulations in thermospheric composition by solar wind high speed streams
Geophysical Research Letters, 2008
The role of the vertical E x B drift for the formation of the longitudinal plasma density structure in the low-latitude F region
Annales Geophysicae, 2008
Trends and visions for small satellite missions
Small Satellites For Earth Observation: Selected Contributions, 2008
Wave structures of the plasma density and vertical E x B drift in low-latitude F region
Journal of Geophysical Research-Space Physics, 2008
"Faster, better, and cheaper" at NASA: Lessons learned in managing and accepting risk
Acta Astronautica, 2007
A tomographic model for ionospheric imaging with the Global Ultraviolet Imager
Radio Science, 2007
Comparison of ionospheric measurements made by digisondes with those inferred from ultraviolet airglow
Advances in Space Research, 2007
Constraining and validating the Oct/Nov 2003 X-class EUV flare enhancements with observations of FUV dayglow and E-region electron densities
Journal of Geophysical Research-Space Physics, 2007
Longitudinal structure of the vertical E x B drift and ion density seen from ROCSAT-1
Geophysical Research Letters, 2007
Observations of a positive storm phase on September 10, 2005
Journal of Atmospheric and Solar-Terrestrial Physics, 2007
Observations of ionospheric convection from the Wallops SuperDARN radar at middle latitudes
Journal of Geophysical Research-Space Physics, 2007
Plausible effect of atmospheric tides on the equatorial ionosphere observed by the FORMOSAT-3/COSMIC: Three-dimensional electron density structures
Geophysical Research Letters, 2007
Polar rain aurora
Geophysical Research Letters, 2007
Spike-like change of the vertical E x B drift in the equatorial region during very large geomagnetic storms
Geophysical Research Letters, 2007
Summer-winter hemispheric asymmetry of the sudden increase in ionospheric total electron content and of the O/N-2 ratio: Solar activity dependence
Journal of Geophysical Research-Space Physics, 2007
An unusual nightside distortion of the auroral oval: TIMED/GUVI and IMAGE/FUV observations
Journal of Geophysical Research-Space Physics, 2006
Characteristics of the storm-induced big bubbles (SIBBs)
Journal of Geophysical Research-Space Physics, 2006
Control of equatorial ionospheric morphology by atmospheric tides
Geophysical Research Letters, 2006
Dayside convection aligned auroral arcs
Geophysical Research Letters, 2006
Effect of atmospheric tides on the morphology of the quiet time, postsunset equatorial ionospheric anomaly
Journal of Geophysical Research-Space Physics, 2006
F-region Pedersen conductivity deduced using the TIMED/GUVI limb retrievals
Annales Geophysicae, 2006
First observations of the temporal/spatial variation of the sub-auroral polarization stream from the SuperDARN Wallops HF radar
Geophysical Research Letters, 2006
Global thermosphere-ionosphere response to onset of 20 November 2003 magnetic storm
Journal of Geophysical Research-Space Physics, 2006
Managing innovative space missions: lessons from NASA
Journal of Knowledge Management, 2006
Ionospheric disturbances during the magnetic storm of 15 July 2000: Role of the fountain effect and plasma bubbles for the formation of large equatorial plasma density depletions
Journal of Geophysical Research-Space Physics, 2006
Large variations in the thermosphere and ionosphere during minor geomagnetic disturbances in April 2002 and their association with IMF B-y
Journal of Geophysical Research-Space Physics, 2006
Nightside thermospheric FUV emissions due to energetic neutral atom precipitation during magnetic superstorms
Journal of Geophysical Research-Space Physics, 2006
Nighttime F-region morphology in the low and middle latitudes seen from DMSP F15 and TIMED/GUVI
Journal of Atmospheric and Solar-Terrestrial Physics, 2006
Response of the Upper/Middle atmosphere to coronal holes and powerful high-speed solar wind streams in 2003
Recurrent Magnetic Storms: Corotating Solar Wind Streams, 2006
Tomographic imaging of equatorial plasma bubbles
Geophysical Research Letters, 2006
C and C+ in the Venusian thermosphere/ionosphere
Journal of Geophysical Research-Space Physics, 2005
Energy transport in the thermosphere during the solar storms of April 2002
Journal of Geophysical Research-Space Physics, 2005
Far-ultraviolet signature of polar cusp during southward IMF B-z observed by TIMED/Global Ultraviolet Imager and DMSP
Journal of Geophysical Research-Space Physics, 2005
First look at the 20 November 2003 superstorm with TIMED/GUVI: Comparisons with a thermospheric global circulation model
Journal of Geophysical Research-Space Physics, 2005
Large-scale variations of the low-latitude ionosphere during the October-November 2003 superstorm: Observational results
Journal of Geophysical Research-Space Physics, 2005
Method for characterization of the equatorial anomaly using image subspace analysis of Global Ultraviolet Imager data
Journal of Geophysical Research-Space Physics, 2005
Morphology of the equatorial anomaly and equatorial plasma bubbles using image subspace analysis of Global Ultraviolet Imager data
Journal of Geophysical Research-Space Physics, 2005
Nightside detached auroras due to precipitating protons/ions during intense magnetic storms
Journal of Geophysical Research-Space Physics, 2005
October 2002 30-day incoherent scatter radar experiments at Millstone Hill and Svalbard and simultaneous GUVI/TIMED observations
Geophysical Research Letters, 2005
Storm-time enhancement of mid-latitude ultraviolet emissions due to energetic neutral atom precipitation
Geophysical Research Letters, 2005
Two components of ionospheric plasma structuring at midlatitudes observed during the large magnetic storm of October 30, 2003
Geophysical Research Letters, 2005
Undulations on the equatorward edge of the diffuse proton aurora: TIMED/GUVI observations
Journal of Geophysical Research-Space Physics, 2005
Coincident equatorial bubble detection by TIMED/GUVI and ROCSAT-1
Geophysical Research Letters, 2004
STARS: STellar Absorption and Refraction Sensor
Space 2004 Conference and Exhibit, 2004
Double dayside detached auroras: TIMED/GUVI observations
Geophysical Research Letters, 2004
F-region plasma distribution seen from TIMED/GUVI and its relation to the equatorial spread F activity
Geophysical Research Letters, 2004
GUVI: A hyperspectral imager for geospace
Instruments, Science, and Methods For Geospace and Planetary Remote Sensing, 2004
Height-integrated Joule and auroral particle heating in the night side high latitude thermosphere
Geophysical Research Letters, 2004
O/N-2 changes during 1-4 October 2002 storms: IMAGE SI-13 and TIMED/GUVI observations
Journal of Geophysical Research-Space Physics, 2004
Quiet-time seasonal behavior of the thermosphere seen in the far ultraviolet dayglow
Journal of Geophysical Research-Space Physics, 2004
Retrievals of nighttime electron density from Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) mission Global Ultraviolet Imager (GUVI) measurements
Journal of Geophysical Research-Space Physics, 2004
Solar EUV irradiance variability derived from terrestrial far ultraviolet dayglow observations
Geophysical Research Letters, 2004
Thermospheric infrared radiance response to the April 2002 geomagnetic storm from SABER infrared and GUVI ultraviolet limb data
Remote Sensing of Clouds and the Atmosphere Viii, 2004
Advanced time-of-flight system-on-a-chip for remote sensing instruments
Sensors, Systems and Next-Generation Satellites Vi, 2003
Case study of the 15 July 2000 magnetic storm effects on the ionosphere-driver of the positive ionospheric storm in the winter hemisphere
Journal of Geophysical Research-Space Physics, 2003
Initial observations with the Global Ultraviolet Imager (GUVI) in the NASA TIMED satellite mission
Journal of Geophysical Research-Space Physics, 2003
Negative ionospheric storms seen by the IMAGE FUV instrument
Journal of Geophysical Research-Space Physics, 2003
The first coordinated ground- and space-based optical observations of equatorial plasma bubbles
Geophysical Research Letters, 2003
The natural thermostat of nitric oxide emission at 5.3 mu m in the thermosphere observed during the solar storms of April 2002
Geophysical Research Letters, 2003
The role of emerging technologies in imagery for disaster monitoring and disaster relief assistance
Acta Astronautica, 2003
The use of far ultraviolet remote sensing to monitor space weather
Space Weather 2000, 2003
Atmospheric remote sensing using a combined extinctive and refractive stellar occultation technique - 1. Overview and proof-of-concept observations
Journal of Geophysical Research-Atmospheres, 2002
Sudden solar wind dynamic pressure enhancements and dayside detached auroras: IMAGE and DMSP observations
Journal of Geophysical Research-Space Physics, 2002
Preface
Advances in Space Research, 2002
Ultraviolet remote sensing techniques for planetary aeronomy
Atmospheres in the Solar System, 2002
Midcourse Space Experiment/Ultraviolet and Visible Imaging and Spectrographic Imaging limb observations of combined proton/hydrogen/electron aurora
Journal of Geophysical Research-Space Physics, 2001
Middle ultraviolet imager observations of the distribution of polar mesospheric clouds
Middle Atmosphere Temporal and Spatial Structures, 2001
Model update for mesospheric/thermospheric nitric oxide
Physics and Chemistry of the Earth Part C-Solar-Terrestial and Planetary Science, 2001
On-orbit calibration of the Special Sensor Ultraviolet Scanning Imager (SSUSI) - a far-UV imaging spectrograph on DMSP F-16
Optical Spectroscopic Techniques, Remote Sensing, and Instrumentation For Atmospheric and Space Research Iv, 2001
STARS: The stellar absorption and refraction sensor
Optical Spectroscopic Techniques, Remote Sensing, and Instrumentation For Atmospheric and Space Research Iv, 2001
Validation of remote sensing products produced by the Special Sensor Ultraviolet Scanning Imager (SSUSI) - a far-UV imaging spectrograph on DMSP F16
Optical Spectroscopic Techniques, Remote Sensing, and Instrumentation For Atmospheric and Space Research Iv, 2001
Nighttime O(2) and O(3) profiles measured by MSX/UVISI using stellar occultation techniques
Atmospheric Science Across the Stratopause, 2000
Summary of the small satellites for earth observation - 2(nd) International Symposium of the International Academy of Astronautics Berlin, Germany April 12-16, 1999
Acta Astronautica, 2000
The use of small satellites in the NASA Earth Science Enterprise (ESE) Earth Observing System (EOS)
Acta Astronautica, 2000
Advancing our understanding of the atmosphere and ionosphere using remote sensing techniques
Johns Hopkins Apl Technical Digest, 1999
Altitudes of polar mesospheric clouds observed by a middle ultraviolet imager
Journal of Geophysical Research-Space Physics, 1999
Auroral imaging and space-based optical remote sensing
Johns Hopkins Apl Technical Digest, 1999
Comet Hale-Bopp (C/1995 O1) near 2.3 AU postperihelion: Southwest Ultraviolet Imaging System measurements of the H2O and dust production
Astronomical Journal, 1999
Global ultraviolet imager (GUVI): measuring composition and energy inputs for the NASA Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) mission
Optical Spectroscopic Techniques and Instrumentation For Atmospheric and Space Research Iii, 1999
Optical calibration of the Global Ultraviolet Imager (GUVI)
Ultraviolet Atmospheric and Space Remote Sensing: Methods and Instrumentation Ii, 1999
Performance of the wedge-and-strip microchannel plate detectors and electronics for the Global Ultraviolet Imager
Euv, X-Ray, and Gamma-Ray Instrumentation For Astronomy X, 1999
Polar cap optical observations of topside (> 900km) molecular nitrogen ions
Geophysical Research Letters, 1999
Astronomy on the midcourse space experiment
New Horizons From Multi-Wavelength Sky Surveys, 1998
Design and performance of the Global Ultraviolet Imager (GUVI)
Euv, X-Ray, and Gamma-Ray Instrumentation For Astronomy Ix, 1998
Nitric oxide abundance in the mesosphere lower thermosphere region: Roles of solar soft X rays, suprathermal N(S-4) atoms, and vertical transport
Journal of Geophysical Research-Space Physics, 1998
On the sodium tail of comet Hale-Bopp (C/1995 O1)
Geophysical Research Letters, 1998
Atmospheric O/N-2 ratios from photoelectron spectra
Journal of Geophysical Research-Space Physics, 1997
UV observations of extended galaxies with UVISI
Ultraviolet Universe At Low and High Redshift: Probing the Progress of Galaxy Evolution, 1997
MSX - A multiuse space experiment
Johns Hopkins Apl Technical Digest, 1996
Simulation of space-borne optical sensor data .1. Modeling capabilities with examples
Ultraviolet Atmospheric and Space Remote Sensing: Methods and Instrumentation, 1996
The 825-1110 angstrom EUV spectrum of Venus
Icarus, 1996
SATELLITE REMOTE-SENSING OF THERMOSPHERIC O/N-2 AND SOLAR EUV .1. THEORY
Journal of Geophysical Research-Space Physics, 1995
CONTINUED DEVELOPMENT OF RADIANCE MODELS AND IMAGING SOFTWARE FOR THE REDUCTION, ANALYSIS, AND VISUALIZATION OF SPACE-BASED UV IMAGING DATA
Ultraviolet Technology V, 1994
MIDCOURSE SPACE EXPERIMENT SATELLITE ULTRAVIOLET AND VISIBLE BACKGROUND PHENOMENOLOGY
Characterization and Propagation of Sources and Backgrounds, 1994
MODEL FOR GENERATING GLOBAL IMAGES OF EMISSION FROM THE THERMOSPHERE
Applied Optics, 1994
THE GLOBAL ULTRAVIOLET IMAGER (GUVI) FOR THE NASA TIMED MISSION
Optical Spectroscopic Techniques and Instrumentation For Atmospheric and Space Research, 1994
A MODEL FOR GENERATING UV IMAGES AT SATELLITE ALTITUDES
Ultraviolet Technology Iv, 1993
FUV REMOTE-SENSING OF THERMOSPHERIC COMPOSITION AND THE SOLAR EUV FLUX
Ultraviolet Technology Iv, 1993
GLOBAL ATMOSPHERIC REMOTE-SENSING
Proceedings of the Twenty-Fifth International Symposium on Remote Sensing and Global Environmental Change: Tools For Sustainable Development, Vols I and Ii, 1993
POWER SPECTRAL DENSITY ANALYSIS OF UV CLUTTER
Ultraviolet Technology Iv, 1993
SPECTROSCOPY AND IMAGING OF THE COSMIC DIFFUSE UV BACKGROUND-RADIATION
Ultraviolet Technology Iv, 1993
SSUSI - HORIZON-TO-HORIZON AND LIMB-VIEWING SPECTROGRAPHIC IMAGER FOR REMOTE-SENSING OF ENVIRONMENTAL PARAMETERS
Ultraviolet Technology Iv, 1993
TWILIGHT RAYLEIGH-SCATTERING OBSERVED FROM GROUND AND SPACE
Ultraviolet Technology Iv, 1993
ATOMIC OXYGEN IN THE MARTIAN THERMOSPHERE
Journal of Geophysical Research-Space Physics, 1992
NIGHT UV SPECTRA (1100-2900-ANGSTROM) AT MID AND LOW LATITUDE DURING A MAGNETIC STORM
Geophysical Research Letters, 1992
SPECIAL SENSOR ULTRAVIOLET SPECTROGRAPHIC IMAGER (SSUSI) - AN INSTRUMENT DESCRIPTION
Instrumentation For Planetary and Terrestrial Atmospheric Remote Sensing, 1992
ANALYSIS AND INTERPRETATION OF OBSERVATIONS OF AIRGLOW AT 297 NM IN THE VENUS THERMOSPHERE
Journal of Geophysical Research-Space Physics, 1989
ANALYSIS OF PIONEER VENUS ORBITER ULTRAVIOLET SPECTROMETER LYMAN-ALPHA DATA FROM NEAR THE SUBSOLAR REGION
Journal of Geophysical Research-Space Physics, 1988
CO+ AND N2+ IN THE VENUS IONOSPHERE
Journal of Geophysical Research-Space Physics, 1988
CORRECTION
Journal of Geophysical Research-Space Physics, 1988
<title>EUV Imaging Of The Ionosphere From Space</title>
Ultraviolet Technology II, 1988
ATOMIC-HYDROGEN AND SOLAR LYMAN-ALPHA FLUX DEDUCED FROM STP 78-1 UV OBSERVATIONS
Journal of Geophysical Research-Space Physics, 1987
THE O I 3D3D-DEGREES-2P4 P-3 TRANSITION AT 1026-A IN THE DAY AIRGLOW
Journal of Geophysical Research-Space Physics, 1987
REANALYSIS OF PIONEER ORBITER ULTRAVIOLET SPECTROMETER DATA - OI 1304 INTENSITIES AND ATOMIC OXYGEN DENSITIES
Geophysical Research Letters, 1986
PIONEER VENUS ORBITER ULTRAVIOLET SPECTROMETER LIMB OBSERVATIONS - ANALYSIS AND INTERPRETATION OF THE 166-NM AND 156-NM DATA
Journal of Geophysical Research-Space Physics, 1985
Challenges In Knowledge Management
Commerce in Space,
Challenges In Knowledge Management
Commerce in Space,