A5043177179- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Planetary Science and Exploration
- Earthquake Detection and Analysis
- Stellar, planetary, and galactic studies
- Space Science and Extraterrestrial Life
- Space Exploration and Technology
- Atomic and Subatomic Physics Research
- Geophysics and Gravity Measurements
- Laser-induced spectroscopy and plasma
- Spacecraft and Cryogenic Technologies
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Atomic and Molecular Physics
- Geophysical and Geoelectrical Methods
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Astronomy and Astrophysical Research
- Spacecraft Design and Technology
- High-pressure geophysics and materials
- Space exploration and regulation
- Space Satellite Systems and Control
Johns Hopkins University Applied Physics Laboratory
2014-2024
Johns Hopkins University
2001-2024
Allentown Public Library
2019-2023
Applied Research (United States)
2018
Applied Research Laboratory at the University of Hawai‘i
2018
Infineon Technologies (Germany)
2017-2018
Swedish Institute of Space Physics
1997-2013
Max Planck Society
2005-2012
University of California, Los Angeles
2011
Max Planck Institute for Extraterrestrial Physics
2009-2010
The Analyzer of Space Plasma and Energetic Atoms (ASPERA) on board the Mars Express spacecraft found that solar wind plasma accelerated ionospheric ions may be observed all way down to pericenter 270 kilometers above dayside planetary surface. This is very deep in ionosphere, implying direct exposure martian topside atmosphere forcing. low-altitude penetration energization due irregularities or perturbations, magnetic anomalies at Mars, both.
The Radiation Belt Storm Probes Ion Composition Experiment (RBSPICE) on the two Van Allen spacecraft is magnetosphere ring current instrument that will provide data for answering three over-arching questions Program: RBSPICE determine “how space weather creates storm-time around Earth, how supplies and supports creation of radiation belt populations,” involved in losses. a time-of-flight versus total energy measures ions over range from ∼20 keV to ∼1 MeV. also measure electrons ∼25 MeV order...
During geomagnetic storms the magnetic field of inner magnetosphere exhibits large‐scale variations over timescales from minutes to days. Being mainly controlled by motion relativistic electrons outer radiation belt can be highly susceptible its variations. This paper investigates evolution during 7 September 2002 storm. Evolution electron phase space density is calculated with use a test‐particle simulation in storm time and electric fields. The results show that intensification ring...
The Magnetospheric Imaging Instrument (MIMI) onboard the Cassini spacecraft observed saturnian magnetosphere from January 2004 until Saturn orbit insertion (SOI) on 1 July 2004. MIMI sensors frequent energetic particle activity in interplanetary space for several months before SOI. When imaging sensor was switched to its neutral atom (ENA) operating mode 20 February 2004, at approximately 10(3) times Saturn's radius RS (0.43 astronomical units), a weak but persistent signal magnetosphere....
Both heliophysics and planetary physics seek to understand the complex nature of solar wind's interaction with system obstacles like Earth's magnetosphere, ionospheres Venus Mars, comets. Studies this objective are frequently conducted help single or multipoint in situ electromagnetic field particle observations, guided by predictions both local global numerical simulations, placed context observations from far extreme ultraviolet (FUV, EUV), hard X-ray, energetic neutral atom imagers (ENA)....
The idea of an "Outer solar system probe: to be aimed away from the Sun in plane ecliptic" dates a report "Simpson Committee" Space Science Board National Academy Sciences March 1960. After many studies and name changes, what is now known as "Interstellar Probe" has matured concept for making new discoveries that can made no other way, by going places yet explored. central technical question always been propulsion with "near-future" capabilities taken backdrop defining mission requirements....
Abstract The NASA New Horizons Venetia Burney Student Dust Counter (SDC) measures dust particle impacts along the spacecraft’s flight path for grains with mass ≥10 −12 g, mapping out their spatial density distribution. We present latest SDC density, size distribution, and flux measurements through 55 au compare them to numerical model predictions. Kuiper Belt objects (KBOs) are thought be dominant source of interplanetary particles in outer solar system due both collisions between KBOs...
The Magnetospheric Imaging Instrument (MIMI) Ion and Neutral Camera (INCA) on the Cassini spacecraft has recorded abrupt increases in energetic neutral atom flux coming from general direction of Saturn's magnetotail. These bursts ion activity tail are well correlated with enhancements Saturn kilometric radiation. Given similarities between these events substorm Earth, including their dependence interplanetary conditions, we conclude that Earth‐like substorms occur within magnetosphere.
Measurements from the Cassini Magnetospheric Imaging Instrument (MIMI) beginning in July 2004 reveal that sudden planetward injections of energetic ions (5–200 keV) and electrons (20–200 over confined regions azimuth are pervasive events Saturn's magnetosphere radial range 3.8 to 11.2 Saturn radii (R S ). is thus similar both Earth Jupiter pervasiveness such injections. At with Cassini, unlike Galileo, effects large gradients global azimuthal rotational flow pattern often dominates...
Auroras are caused by accelerated charged particles precipitating along magnetic field lines into a planetary atmosphere, the auroral brightness being roughly proportional to particle energy flux. The Analyzer of Space Plasma and Energetic Atoms experiment on Mars Express spacecraft has made detailed study acceleration processes nightside Mars. We observed electrons ions in deep high-altitude region that map geographically interface/cleft regions associated with martian crustal magnetization...
We examine the 18 April 2002 sawtooth event. find that strong magnetic field dipolarizations observed in association with each tooth are not global occurrence but rather confined to nightside. In addition, we flux increases globally dispersionless. Instead, is associated a nonglobal, wider‐than‐usual, dispersionless injection region consistent high Kp versions of standard boundary model (which places entire nightside segment geosynchronous orbit tailward for values above about 5). also...
We report sample results on Saturn magnetospheric energetic ion spectral shapes using measurements obtained from the Magnetospheric Imaging Instrument (MIMI) suite onboard Cassini. The intensities are measured by Charge Energy Mass Spectrometer (CHEMS) that covers energy range of 3 to 236 keV/e, Low Measurements System (LEMMS) covering 0.024 < E 18 MeV, and Ion Neutral Camera (INCA) provides in mode at ∼5.5 >220 keV for protons. data used cover several passes period 1 July 2004 10...
From the 27th to 28th January 2009, Cassini spacecraft remotely acquired combined observations of Saturns southern aurorae at radio, ultraviolet and infrared wavelengths, while monitoring ion injections in middle magnetosphere from energetic neutral atoms. Simultaneous measurements included sampling a full planetary rotation, relevant timescale investigate auroral emissions driven by processes internal magnetosphere. In addition, this interval coincidently matched powerful substorm-like...
During the course of its evolution, our Sun and protective magnetic bubble have plowed through dramatically different interstellar environments throughout galaxy. The vast range conditions plasma, gas, dust high-energy cosmic rays on this "solar journey" helped shape solar system that we live in. Today, bubble, or Heliosphere, is likely about to enter a completely new regime space will, yet again, change entire heliospheric interaction how it shields us from environment. Interstellar Probe...
The local time distribution of the ring current in 27–119 keV range during several geomagnetic storm main phases have been investigated. data was obtained by high energy neutral atom (HENA) imager onboard IMAGE. Global proton distributions are derived from observed energetic (ENA) images using a linear inversion technique. During storms with low IMF B y peak is around 01 MLT. For can rotate to dawn. rotation angle depends on solar wind velocity and interplanetary magnetic field (IMF) , but...