Search Results - "Groves, Keith"

On the Relationship Between the Rate of Change of Total Electron Content Index (ROTI), Irregularity Strength (CkL), and the Scintillation Index (S4) by Carrano, Charles S., Groves, Keith M., Rino, Charles L.

“…We present a new quantitative theory for the rate of change of total electron content index (ROTI) by noting its straightforward relationship to the phase…”
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A 2‐Dimensional Data Detrending Technique for Equatorial Plasma Bubble Studies Using GOLD Far Ultraviolet Observations by Pradipta, Rezy, Huang, Chaosong, Groves, Keith M.

“…We formulate a numerical data detrending technique that can be used to help reveal large‐scale equatorial plasma bubble (EPB) structures in 2‐dimensional data…”
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Storm‐Time Subauroral Ionospheric Plasma Density Irregularities and the Substorm Current Wedge by Pradipta, Rezy, Mishin, Evgeny, Groves, Keith M.

“…We report on the development of plasma density irregularities in the subauroral ionosphere over the North American sector during the 17 March 2015 Saint…”
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A Study of Post‐Sunset Spread‐F Initiation During the 2013 EVEX Campaign by Kudeki, Erhan, Reyes, Pablo, Wallace, Aaron, Ye, Bingqian, Pfaff, Robert F., Larsen, Miguel F., Groves, Keith M.

“…Equatorial Vortex Experiment (EVEX), the EVEX mission of May 2013, carried out from Roi‐Namur, Kwajalein Atoll, explored the initiation physics of equatorial…”
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Peak‐Height Distribution of Equatorial Ionospheric Plasma Bubbles: Analysis and Modeling of C/NOFS Satellite Observations by Joshi, Dev R., Groves, Keith M., Retterer, John M., Carrano, Charles. S., Roddy, Patrick A.

“…We present the first observational determination of statistical limits on the rise of equatorial plasma bubbles as a function of solar flux. We analyzed in…”
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Simulating the impacts of ionospheric scintillation on L band SAR image formation by Carrano, Charles S., Groves, Keith M., Caton, Ronald G.

“…We develop a phase screen model called the Synthetic Aperture Radar (SAR) Scintillation Simulator (SAR‐SS) for predicting the impacts of ionospheric…”
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Leveraging Geodetic GPS Receivers for Ionospheric Scintillation Science by Mrak, Sebastijan, Semeter, Joshua, Nishimura, Yukitoshi, Rodrigues, Fabiano S., Coster, Anthea J., Groves, Keith

“…We demonstrate scintillation analysis from a network of geodetic Global Positioning System (GPS) receivers which provide data at 1‐second resolution. We…”
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A Configuration Space Model for Intermediate‐Scale Ionospheric Structure by Rino, Charles, Carrano, Charles, Groves, Keith, Yokoyama, Tatsuhiro

“…Stochastic ionospheric structure is characterized by spectral density functions (SDFs), which are formally the average intensity of Fourier transformations of…”
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The High Latitude Ionospheric Response to the Major May 2024 Geomagnetic Storm: A Synoptic View by Themens, David R., Elvidge, Sean, McCaffrey, Anthony, Jayachandran, P. T., Coster, Anthea, Varney, Roger H., Galkin, Ivan, Goodwin, Lindsay V., Watson, Chris, Maguire, Sophie, Kavanagh, Andrew J., Zhang, Shun‐Rong, Goncharenko, Larisa, Bhatt, Asti, Dorrian, Gareth, Groves, Keith, Wood, Alan G., Reid, Ben

“…The high latitude ionospheric evolution of the May 10‐11, 2024, geomagnetic storm is investigated in terms of Total Electron Content and contextualized with…”
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Ground-based infrastructure for monitoring and characterizing intermediate-scale ionospheric irregularities at mid-latitudes by Mrak, Sebastijan, Coster, Anthea J., Groves, Keith, Nikoukar, Romina

“…We discuss potential science investigations at mid-latitudes enabled by a modern, space-weather-grade, ground-based Radio-Frequency network of scintillation…”
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A characterization of intermediate‐scale spread F structure from four years of high‐resolution C/NOFS satellite data by Rino, Charles L., Carrano, Charles S., Groves, Keith M., Roddy, Patrick A.

“…Power law spectra have been invoked to interpret equatorial scintillation data for decades. Published analyses of intensity and phase scintillation data…”
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The electrodynamic effects of MOSC‐like plasma clouds by Retterer, John, Groves, Keith M., Pedersen, Todd R., Caton, Ronald G.

“…The effects on the plasma/electrodynamic environment in the low‐latitude ionosphere produced by the artificial plasma clouds created in the Metal Oxide Space…”
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Empirical modeling of plasma clouds produced by the Metal Oxide Space Clouds experiment by Pedersen, Todd R., Caton, Ronald G., Miller, Daniel, Holmes, Jeffrey M., Groves, Keith M., Sutton, Eric

“…The Advanced Research Project Agency (ARPA) Long‐Range Tracking And Instrumentation Radar (ALTAIR) radar at Kwajalein Atoll was used in incoherent scatter mode…”
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A technique for inferring zonal irregularity drift from single‐station GNSS measurements of intensity (S4) and phase (σφ) scintillations by Carrano, Charles S., Groves, Keith M., Rino, Charles L., Doherty, Patricia H.

“…The zonal drift of ionospheric irregularities at low latitudes is most commonly measured by cross‐correlating observations of a scintillating satellite signal…”
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A physics‐based model for the ionization of samarium by the MOSC chemical releases in the upper atmosphere by Bernhardt, Paul A., Siefring, Carl L., Briczinski, Stanley J., Viggiano, Albert, Caton, Ronald G., Pedersen, Todd R., Holmes, Jeffrey M., Ard, Shaun, Shuman, Nicholas, Groves, Keith M.

“…Atomic samarium has been injected into the neutral atmosphere for production of electron clouds that modify the ionosphere. These electron clouds may be used…”
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Artificial ionospheric modification: The Metal Oxide Space Cloud experiment by Caton, Ronald G., Pedersen, Todd R., Groves, Keith M., Hines, Jack, Cannon, Paul S., Jackson‐Booth, Natasha, Parris, Richard T., Holmes, Jeffrey M., Su, Yi‐Jiun, Mishin, Evgeny V., Roddy, Patrick A., Viggiano, Albert A., Shuman, Nicholas S., Ard, Shaun G., Bernhardt, Paul A., Siefring, Carl L., Retterer, John, Kudeki, Erhan, Reyes, Pablo M.

“…Clouds of vaporized samarium (Sm) were released during sounding rocket flights from the Reagan Test Site, Kwajalein Atoll in May 2013 as part of the Metal…”
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Multiple phase screen modeling of ionospheric scintillation along radio occultation raypaths by Carrano, Charles S., Groves, Keith M., Caton, Ronald G., Rino, Charles L., Straus, Paul R.

“…We present the Radio Occultation Scintillation Simulator (ROSS), which uses the multiple phase screen method (MPS) to simulate the forward scatter of radio…”
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Can Numerical Simulations of Equatorial Plasma Bubble Plume Structures be Simplified for Operational and Practical Usage? by Pradipta, Rezy, Carrano, Charles S., Groves, Keith M., Doherty, Patricia H.

“…We argue the merits of having a simplified method to simulate equatorial plasma bubble (EPB) plume structures for practical usage. The capability to…”
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HF propagation results from the Metal Oxide Space Cloud (MOSC) experiment by Joshi, Dev, Groves, Keith M., McNeil, William, Carrano, Charles, Caton, Ronald G., Parris, Richard T., Pederson, Todd R., Cannon, Paul S., Angling, Matthew, Jackson‐Booth, Natasha

“…With support from the NASA sounding rocket program, the Air Force Research Laboratory launched two sounding rockets in the Kwajalein Atoll, Marshall Islands in…”
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Latitudinal and Local Time Variation of Ionospheric Turbulence Parameters during the Conjugate Point Equatorial Experiment in Brazil by Carrano, Charles S., Groves, Keith M., Valladares, Cesar E.

“…Previous authors have reported on the morphology of GPS scintillations and irregularity zonal drift during the 2002 Conjugate Point Equatorial Experiment…”
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