D. W. Curtis
A5107352854- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Nuclear Physics and Applications
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Mass Spectrometry Techniques and Applications
- Spacecraft Design and Technology
- Stellar, planetary, and galactic studies
- Solar Radiation and Photovoltaics
- Laser-induced spectroscopy and plasma
- Spacecraft and Cryogenic Technologies
- Atmospheric Ozone and Climate
- Superconducting and THz Device Technology
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
- Gamma-ray bursts and supernovae
- Distributed and Parallel Computing Systems
- Non-Invasive Vital Sign Monitoring
- Radio Astronomy Observations and Technology
- Ion-surface interactions and analysis
- Astronomy and Astrophysical Research
- solar cell performance optimization
- Analytical chemistry methods development
University of California, Berkeley
2007-2024
University of California System
2008-2021
Massachusetts Institute of Technology
2007-2012
Super Stars Literacy
1997-2001
Goddard Space Flight Center
1998
University of Arizona
1998
Space Research Institute
1998
University of Graz
1998
Berkeley College
1989
Centre National d'Études Spatiales
1987
Abstract. On board the four Cluster spacecraft, Ion Spectrometry (CIS) experiment measures full, three-dimensional ion distribution of major magnetospheric ions (H+, He+, He++, and O+) from thermal energies to about 40 keV/e. The consists two different instruments: a COmposition DIstribution Function analyser (CIS1/CODIF), giving mass per charge composition with medium (22.5°) angular resolution, Hot Analyser (CIS2/HIA), which does not offer resolution but has better (5.6°) that is adequate...
The magnetometer and electron reflectometer investigation (MAG/ER) on the Mars Global Surveyor spacecraft has obtained magnetic field plasma observations throughout near-Mars environment, from beyond influence of to just above surface (at an altitude ∼100 kilometers). solar wind interaction with is in many ways similar that at Venus active comet, is, primarily ionospheric-atmospheric interaction. No significant planetary global scale been detected date (<2 × 10 21 Gauss–cubic centimeter),...
The Solar Wind Electrons Alphas and Protons (SWEAP) Investigation on Probe Plus is a four sensor instrument suite that provides complete measurements of the electrons ionized helium hydrogen constitute bulk solar wind coronal plasma. SWEAP consists Cup (SPC) Analyzers (SPAN). SPC Faraday looks directly at Sun measures ion electron fluxes flow angles as function energy. SPAN an electrostatic analyzer (ESA) ram side SPP (SPAN-A) ESA anti-ram (SPAN-B). SPAN-A has time flight section enables it...
Abstract The Solar Probe ANalyzer for Ions (SPAN-I) onboard NASA’s Parker spacecraft is an electrostatic analyzer with time-of-flight capabilities that measures the ion composition and three-dimensional distribution function of thermal corona solar-wind plasma. SPAN-I energy per charge ions in solar wind from 2 eV to 30 keV a field view 247.°5 × 120° while simultaneously separating H + He ++ develop 3D velocity functions individual species. These observations, combined reduced measured by...
The IMPACT (In situ Measurements of Particles And CME Transients) investigation on the STEREO mission was designed and developed to provide multipoint solar wind suprathermal electron, interplanetary magnetic field, energetic particle information required unravel nature coronal mass ejections their heliospheric consequences. consists seven individual sensors which are packaged into a boom suite, SEP suite. This review summarizes science objectives IMPACT, instruments that comprise...
The magnetometer and electron reflectometer experiment on the Lunar Prospector spacecraft has obtained maps of lunar crustal magnetic fields observed interaction between solar wind regions strong at high selenographic latitude (30 degreesS to 80 degreesS) low ( approximately 100 kilometers) altitude. Electron reflection antipodal Imbrium Serenitatis impact basins, extending latitude, show that fill most zones those basins. This finding provides further evidence for hypothesis basin-forming...
Abstract Switchbacks (rotations of the magnetic field) are observed on Parker Solar Probe . Their evolution, content, and plasma effects studied in this paper. The solar wind does not receive a net acceleration from switchbacks that it encountered upstream observation point. typical switchback rotation angle increased with radial distance. Significant Poynting fluxes existed inside, but outside, switchbacks, dependence flux amplitude location is explained quantitatively as being proportional...
The Mars Observer magnetic fields investigation will provide fast vector measurements of the Martian field over a wide dynamic range. fundamental objectives this are (1) to establish nature Mars, (2) develop appropriate models for its representation, which take into account internal sources magnetism and effects interaction with solar wind, (3) map crustal remanent resolution consistent orbit altitude ground track separation. basic instrumentation complement implemented mission is...
Monitoring vital signs and locations of certain classes ambulatory patients can be useful in overcrowded emergency departments at disaster scenes, both on-site during transportation. To useful, such monitoring needs to portable low cost, have minimal adverse impact on personnel, e.g., by not raising an excessive number alarms. The SMART (Scalable Medical Alert Response Technology) system integrates wireless patient (ECG, SpO(2)), geo-positioning, signal processing, targeted alerting, a...
Electrostatic analyzers of different designs have been used since the earliest days space age, beginning with very solar wind measurements made by Mariner 2 en route to Venus in 1962. The Parker Solar Probe (PSP) mission, NASA's first dedicated mission study innermost reaches heliosphere, makes its thermal plasma using a suite instruments called Wind Electrons, Alphas, and Protons (SWEAP) investigation. SWEAP's electron Analyzer (SPAN-E) are pair top-hat electrostatic on PSP that capable...
In situ measurements of the composition and spatial distribution heavy thermal positive ions in coma comet Halley were made with heavy-ion analyzer RPA2-PICCA aboard Giotto spacecraft. Above 50 atomic mass units an ordered series peaks centered at 61, 75, 91, 105 observed. Each peak appears to be composed three or more closely spaced masses. The abundances decrease dissociation rates increase smoothly increasing mass. These observations suggest presence chain molecules that are enriched...