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Found 7 entries in the Bibliography.
Showing entries from 1 through 7
Parker Solar Probe Encounters the Leg of a Coronal Mass Ejection at 14 Solar Radii
We use Parker Solar Probe (PSP) observations to report the first direct measurements of the particle and field environments while crossing the leg of a coronal mass ejection (CME) very close to the Sun (\raisebox-0.5ex\textasciitilde14 Rs). An analysis that combines imaging from 1 au and PSP with a CME model, predicts an encounter time and duration that correspond to an unusual, complete dropout in low-energy solar energetic ions from H-Fe, observed by the Integrated Science Investigation of the Sun (IS\ensuremath\odotIS). T ...
McComas, D.~J.; Sharma, T.; Christian, E.~R.; Cohen, C.~M.~S.; Desai, M.~I.; Hill, M.~E.; Khoo, L.~Y.; Matthaeus, W.~H.; Mitchell, D.~G.; Pecora, F.; Rankin, J.~S.; Schwadron, N.~A.; Szalay, J.~R.; Shen, M.~M.; Braga, C.~R.; Mostafavi, P.~S.; Bale, S.~D.;
Published by: \apj Published on: feb
YEAR: 2023   DOI: 10.3847/1538-4357/acab5e
Parker Data Used; Solar coronal mass ejections; interplanetary magnetic fields; Interplanetary medium; Interplanetary particle acceleration; Solar energetic particles; Solar wind; Solar coronal heating; Solar magnetic flux emergence; 310; 824; 825; 826; 1491; 1534; 1989; 2000
Small-scale solar jet formation and their associated waves and instabilities
Studies on small-scale jets formation, propagation, evolution, and role, such as type I and II spicules, mottles, and fibrils in the lower solar atmosphere s energetic balance, have progressed tremendously thanks to the combination of detailed observations and sophisticated mathematical modelling. This review provides a survey of the current understanding of jets, their formation in the solar lower atmosphere, and their evolution from observational, numerical, and theoretical perspectives. First, we review some results to d ...
Skirvin, Samuel; Verth, Gary; es, Jos\; Shelyag, Sergiy; Sharma, Rahul; an, Francisco; Ballai, Istvan; Scullion, Eamon; Silva, Suzana; Fedun, Viktor;
Published by: Advances in Space Research Published on: feb
YEAR: 2023   DOI: 10.1016/j.asr.2022.05.033
Solar jets; MHD waves; instabilities; Astrophysics - Solar and Stellar Astrophysics
Nonlinear Interaction of a 3D Kinetic Alfv\ en Wave with a Null Point and Turbulence Generation in the Solar Corona
In the present paper, we have studied nonlinear kinetic Alfv\ en waves (KAWs) in the vicinity of a null point. We have considered the nonlinearity due to ponderomotive effects associated with KAWs in the solar corona. A 3D model equation representing the dynamics of KAWs is developed in this null point scenario. Using numerical methods, we have solved the model equation for solar coronal parameters. The pseudospectral method and the finite difference method have been applied to tackle spatial integration and temporal evaluat ...
Patel, G.; Pathak, N.; Uma, R.; Sharma, R.~P.;
Published by: \solphys Published on: nov
YEAR: 2022   DOI: 10.1007/s11207-022-02083-5
Parker Data Used; Solar corona heating-Sun: corona- turbulence; Wave; Null points
The active region source of a type III radio storm observed by Parker Solar Probe during encounter 2
Context. We investigated the source of a type III radio burst storm during encounter 2 of NASA s Parker Solar Probe (PSP) mission.
Harra, L.; Brooks, D.; Bale, S.; Mandrini, C.; Barczynski, K.; Sharma, R.; Badman, S.; Domínguez, Vargas; Pulupa, M.;
Published by: Astronomy and Astrophysics Published on: 06/2021
YEAR: 2021   DOI: 10.1051/0004-6361/202039514
Sun: corona; Solar wind; Sun: radio radiation; Sun: abundances; Sun: atmosphere; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics; Parker Data Used
The radio frequency telecommunications system for the NASA Europa clipper mission
The NASA Europa Clipper mission, a partnership between the California Institute of Technology Jet Propulsion Laboratory (JPL) and the Johns Hopkins University Applied Physics Laboratory (APL), is currently in Phase B and scheduled for launch in 2022. A Jupiter orbiter, it will perform repeated flybys of the moon, Europa, to assess the icy moon’s structure and habitability. The spacecraft’s dual X/Ka-band radio frequency telecommunications subsystem has five primary functions: Provide spacecraft command capability ...
Srinivasan, Dipak; Angert, Matthew; Ballarotto, Mihaela; Berman, Simmie; Bray, Matthew; Garvey, Robert; Hahne, Devin; Haskins, Chris; Porter, Jamie; Schulze, Ron; Scott, Chris; Sharma, Avinash; Sheldon, Colin;
Published by: Proceedings of the International Astronautical Congress, IAC Published on:
Data handling; Earth (planet); Microwave antennas; NASA; Orbits; Propulsion; Radio navigation; Radio waves; Space flight; Telecommunication; Traveling wave tubes; Parker Engineering
Development of a flight qualified ka-band multi-chip module for the solar probe plus mission
The Johns Hopkins University Applied Physics Lab (JHU/APL) has developed a flight qualified, hermetically sealed, I/Q modulator Ka-band Multi-chip Module (MCM). Prototypes of this device have been developed over the years, but Solar Probe Plus (SPP) will be the first mission to use a flight qualified version of the MCM. This MCM enables a first for a deep-space mission: primary science data downlink with simultaneous data and navigation over Ka-band. SPP will also be the first JHU/APL mission to use Ka-band for downlink. The ...
Matlin, Daniel; Sharma, Avinash; Angert, Matthew; Cheng, Sheng; Lehtonen, John;
Published by: IEEE Aerospace Conference Proceedings Published on:
Commercial off-the-shelf; Electronic equipment testing; Gallium arsenide; III-V semiconductors; Interplanetary flight; Monolithic microwave integrated circuits; NASA; Probes; Parker Engineering
Antenna scattering measurements using a scaled 3-D printed spacecraft model
A method to measure an antenna s performance when mounted to an electrically large and complex-shaped spacecraft is described. In the past, either time-intensive numerical simulations or antenna range measurements of an expensive full-scale model of the spacecraft were used to determine the antenna s performance. An alternative method fabricated a reduced-size scaled spacecraft model using 3-D printing processes. The antenna is also reduced in size by the same scale factor as the spacecraft, but the frequency of operation is ...
Sharma, Avinash; Hahne, Devin; Stilwell, Robert; Malouf, Perry;
Published by: 2016 IEEE Antennas and Propagation Society International Symposium, APSURSI 2016 - Proceedings Published on: