M. Lessard
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View article: Model data comparison of the Alfvénic momentum transfer in the Kinetic-Scale Energy and Momentum Transport experiment (KiNET-X)
Model data comparison of the Alfvénic momentum transfer in the Kinetic-Scale Energy and Momentum Transport experiment (KiNET-X) Open
The Kinetic-Scale Energy and Momentum Transport Experiment was an ionospheric barium release active plasma experiment designed to investigate the non-ideal momentum coupling between the injected ion cloud and the ambient plasma. It is the …
View article: Variation of the Altitude of Auroral Emission During a Substorm Cycle: Stereoscopic Optical Observations During the LAMP Rocket Experiment
Variation of the Altitude of Auroral Emission During a Substorm Cycle: Stereoscopic Optical Observations During the LAMP Rocket Experiment Open
We estimated the altitude of aurora by combining data from all‐sky cameras at multiple places which were obtained during the LAMP sounding rocket experiment in Alaska on 5 March 2022. During the launch window of the rocket, three high‐spee…
View article: Improved Energy Resolution Measurements of Electron Precipitation Observed During an IPDP‐Type EMIC Event
Improved Energy Resolution Measurements of Electron Precipitation Observed During an IPDP‐Type EMIC Event Open
High energy resolution DEMETER satellite observations from the Instrument for the Detection of Particle (IDP) are analyzed during an electromagnetic ion cyclotron (EMIC)‐induced electron precipitation event. Analysis of an Interval Pulsati…
View article: Simultaneous Precipitation of Sub‐Relativistic Electron Microburst and Pulsating Aurora Electrons
Simultaneous Precipitation of Sub‐Relativistic Electron Microburst and Pulsating Aurora Electrons Open
We have identified for the first time an energy‐time dispersion of precipitating electron flux in a pulsating aurora patch, ranging from 6.7 to 580 keV, through simultaneous in‐situ observations of sub‐relativistic electrons of microburst …
View article: Interhemispheric Observations of ULF Waves Caused by Foreshock Transients Under Quiet Solar Wind Conditions
Interhemispheric Observations of ULF Waves Caused by Foreshock Transients Under Quiet Solar Wind Conditions Open
Foreshock transient (FT) events are frequently observed phenomena that are generated by discontinuities in the solar wind. These transient events are known to trigger global‐scale magnetic field perturbations (e.g., ULF waves). We report a…
View article: Interhemispheric asymmetries of neutral upwelling and ion upflow
Interhemispheric asymmetries of neutral upwelling and ion upflow Open
This work addresses interhemispheric differences in cusp-related neutral density enhancements. The focus is on enhancements that are driven by Poleward Moving Auroral Forms (PMAF), which provide a repetitive sequence of soft electron preci…
View article: Recommendations on Funding Mission Operations and Historical Datasets
Recommendations on Funding Mission Operations and Historical Datasets Open
Whitepaper #367 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research; infrastructure/workforce/other programmatic. Additional topics: planetary magnetospheres; research tools and infrastru…
View article: Circuit: A Mission to Unlock the Secrets of Earth’s Global Current System
Circuit: A Mission to Unlock the Secrets of Earth’s Global Current System Open
Whitepaper #439 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: planetary ionospheres / upper atmospheres; space-based missions/projects; system science.
View article: Simultaneous Precipitation of Sub-Relativistic Electron Microburst and Pulsating Aurora Electrons
Simultaneous Precipitation of Sub-Relativistic Electron Microburst and Pulsating Aurora Electrons Open
We have identified for the first time an energy-time dispersion of precipitating electron flux in a pulsating aurora patch, ranging from 6.7 keV to 580 keV, through simultaneous in-situ observations of sub-relativistic electrons of microbu…
View article: Modeling the Effects of Drift Shell Splitting in Two Case Studies of Simultaneous Observations of Substorm‐Driven Pi1B and IPDP‐Type EMIC Waves
Modeling the Effects of Drift Shell Splitting in Two Case Studies of Simultaneous Observations of Substorm‐Driven Pi1B and IPDP‐Type EMIC Waves Open
Intervals of pulsations of diminishing periods (IPDPs) are a subtype of electromagnetic ion cyclotron (EMIC) waves that can be triggered by substorm onset. Pi1B waves are ultralow frequency (ULF) broadband bursts that are well correlated w…
View article: Observations of ion upflow and 630.0 nm emission during pulsating aurora
Observations of ion upflow and 630.0 nm emission during pulsating aurora Open
In this study, we report observations made by filtered (557.7 and 630.0 nm) All-Sky Imagers located at Poker Flat, Alaska alongside Poker Flat Incoherent Scatter Radar data for an event observed on 5 February 2017. Together, the data indic…
View article: Statistical Study of EMIC Wave Propagation Using Space‐Ground Conjugate Observations
Statistical Study of EMIC Wave Propagation Using Space‐Ground Conjugate Observations Open
In the present study, we explore the observational characteristics of Electromagnetic Ion Cyclotron (EMIC) wave propagation from the source region to the ground. We use magnetometers aboard Geostationary Operational Environment Satellite (…
View article: Observations of sunlit N <sub>2</sub> <sup>+</sup> aurora at high altitudes during the RENU2 flight
Observations of sunlit N <sub>2</sub> <sup>+</sup> aurora at high altitudes during the RENU2 flight Open
We present measurements of sunlit aurora during the launch of the Rocket Experiment for Neutral Upwelling 2 (RENU2) on the 13 December 2015, 07:34 UTC. The in situ auroral conditions coincide with those of sunlit aurora and were characteri…
View article: Magnetic Conjugacy of Pc1 Waves and Isolated Proton Precipitation at Subauroral Latitudes: Importance of Ionosphere as Intensity Modulation Region
Magnetic Conjugacy of Pc1 Waves and Isolated Proton Precipitation at Subauroral Latitudes: Importance of Ionosphere as Intensity Modulation Region Open
Pc1 geomagnetic pulsations, equivalent to electromagnetic ion cyclotron waves in the magnetosphere, display a specific amplitude modulation, though the region of the modulation remains an open issue. To classify whether the amplitude modul…
View article: Observations of Particle Loss due to Injection‐Associated Electromagnetic Ion Cyclotron Waves
Observations of Particle Loss due to Injection‐Associated Electromagnetic Ion Cyclotron Waves Open
We report on observations of electromagnetic ion cyclotron (EMIC) waves and their interactions with injected ring current particles and high energy radiation belt electrons. The magnetic field experiment aboard the twin Van Allen Probes sp…
View article: Observations of sunlit N <sub>2</sub> <sup>+</sup> aurora at high altitudes during the RENU2 flight
Observations of sunlit N <sub>2</sub> <sup>+</sup> aurora at high altitudes during the RENU2 flight Open
We present measurements of sunlit aurora during the launch of the Rocket Experiment for Neutral Upwelling 2 (RENU2) on the 13th of December 2015 at 07:34 UT. The in situ auroral conditions coincide with those of sunlit aurora, and were cha…
View article: Comparison of Multiple and Logistic Regression Analyses of Relativistic Electron Flux Enhancement at Geosynchronous Orbit Following Storms
Comparison of Multiple and Logistic Regression Analyses of Relativistic Electron Flux Enhancement at Geosynchronous Orbit Following Storms Open
Many factors influence relativistic outer radiation belt electron fluxes, such as waves in the ultralow frequency (ULF) Pc5, very low frequency (VLF), and electromagnetic ion cyclotron (EMIC) frequency bands, seed electron flux, Dst distur…
View article: Low-noise permalloy ring cores for fluxgate magnetometers
Low-noise permalloy ring cores for fluxgate magnetometers Open
Fluxgate magnetometers are important tools for geophysics and space physics, providing high-precision magnetic field measurements. Fluxgate magnetometer noise performance is typically limited by a ferromagnetic element that is periodically…
View article: Generation of EMIC Waves and Effects on Particle Precipitation During a Solar Wind Pressure Intensification With <i>B</i><sub><i>z</i></sub>>0
Generation of EMIC Waves and Effects on Particle Precipitation During a Solar Wind Pressure Intensification With <i>B</i><sub><i>z</i></sub>>0 Open
During geomagnetic storms, some fraction of the solar wind energy is coupled via reconnection at the dayside magnetopause, a process that requires a southward interplanetary magnetic field B z . Through a complex sequence of events, some o…
View article: Rocket Investigation of Current Closure in the Ionosphere (RICCI): A novel application of CubeSats from a sounding rocket platform
Rocket Investigation of Current Closure in the Ionosphere (RICCI): A novel application of CubeSats from a sounding rocket platform Open
The Rocket Investigation of Current Closure in the Ionosphere (RICCI) sounding rocket mission concept will use the novel deployment of multiple CubeSats as miniature sub-payloads to obtain the first direct in-situ measurement of ionospheri…
View article: Transient Ionospheric Upflow Driven by Poleward Moving Auroral forms Observed During the Rocket Experiment for Neutral Upwelling 2 (RENU2) Campaign
Transient Ionospheric Upflow Driven by Poleward Moving Auroral forms Observed During the Rocket Experiment for Neutral Upwelling 2 (RENU2) Campaign Open
This study examines cumulative effects of a series of poleward moving auroral forms on ion upflow and downflow. These effects are investigated using an ionospheric model with inputs derived from the Rocket Experiment for Neutral Upwelling …
View article: Low-Noise Permalloy Ring-Cores for Fluxgate Magnetometers
Low-Noise Permalloy Ring-Cores for Fluxgate Magnetometers Open
Fluxgate magnetometers are important tools for geophysics and space physics providing high precision magnetic field measurements. Fluxgate magnetometer noise performance is typically limited by a ferromagnetic element that is periodically …
View article: Overview of the Rocket Experiment for Neutral Upwelling Sounding Rocket 2 (RENU2)
Overview of the Rocket Experiment for Neutral Upwelling Sounding Rocket 2 (RENU2) Open
The Rocket Experiment for Neutral Upwelling 2 (RENU2) rocket was launched on 13 December 2015 at 07:34 UT. The payload transited the cusp region during a neutral upwelling event, supported by a comprehensive set of onboard and ground‐based…
View article: MMS, Van Allen Probes, GOES 13, and Ground‐Based Magnetometer Observations of EMIC Wave Events Before, During, and After a Modest Interplanetary Shock
MMS, Van Allen Probes, GOES 13, and Ground‐Based Magnetometer Observations of EMIC Wave Events Before, During, and After a Modest Interplanetary Shock Open
The stimulation of electromagnetic ion cyclotron (EMIC) waves by a magnetospheric compression is perhaps the closest thing to a controlled experiment that is currently possible in magnetospheric physics, in that one prominent factor that c…
View article: EMIC Wave Events During the Four GEM QARBM Challenge Intervals
EMIC Wave Events During the Four GEM QARBM Challenge Intervals Open
This paper presents observations of electromagnetic ion cyclotron (EMIC) waves from multiple data sources during the four Geospace Environment Modeling challenge events in 2013 selected by the Geospace Environment Modeling Quantitative Ass…
View article: A Distributed Lag Autoregressive Model of Geostationary Relativistic Electron Fluxes: Comparing the Influences of Waves, Seed and Source Electrons, and Solar Wind Inputs
A Distributed Lag Autoregressive Model of Geostationary Relativistic Electron Fluxes: Comparing the Influences of Waves, Seed and Source Electrons, and Solar Wind Inputs Open
Relativistic electron flux at geosynchronous orbit depends on enhancement and loss processes driven by ultralow frequency (ULF) Pc5, chorus, and electromagnetic ion cyclotron (EMIC) waves, seed electron flux, magnetosphere compression, the…
View article: Comparison of Relativistic Microburst Activity Seen by SAMPEX With Ground‐Based Wave Measurements at Halley, Antarctica
Comparison of Relativistic Microburst Activity Seen by SAMPEX With Ground‐Based Wave Measurements at Halley, Antarctica Open
Relativistic electron microbursts are a known radiation belt particle precipitation phenomenon; however, experimental evidence of their drivers in space have just begun to be observed. Recent modeling efforts have shown that two different …
View article: Conjugate observations of electromagnetic ion cyclotron waves associated with traveling convection vortex events
Conjugate observations of electromagnetic ion cyclotron waves associated with traveling convection vortex events Open
We report on simultaneous observations of electromagnetic ion cyclotron (EMIC) waves associated with traveling convection vortex (TCV) events caused by transient solar wind dynamic pressure ( P d ) impulse events. The Time History of Event…