B Acronyms and Abbreviations
ACE
Advanced Composition Explorer
ACR
anomalous cosmic ray
AFOSR
Air Force Office of Scientific Research
AIM
atmosphere-ionosphere-magnetosphere
AMISR
Advanced Modular Incoherent Scatter Radar
ATST
Advanced Technology Solar Telescope
AU
astronomical unit (~150,000,000 km)
AURA
Associated Universities for Research in Astronomy
CEDAR
Coupling, Energetics, and Dynamics of Atmospheric Regions
CIR
corotating interaction region
CME
coronal mass ejection
COTS
commercial off-the-shelf
DOD
Department of Defense
EHR
Directorate of Education and Human Resources (NSF)
ESA
European Space Agency
EUV
extreme ultraviolet
eV
electron volt
FASR
Frequency-Agile Solar Radiotelescope
FAST
Fast Auroral Snapshot Explorer
GCR
galactic cosmic ray
GEC
Geospace Electrodynamic Connections
GEM
Geospace Environment Modeling
GEO
Directorate of Geosciences (NSF)
GOES
Geostationary Operational Environmental Satellite
GONG
Global Oscillations Network Group
GS
Geospace
IMAGE
Imager for Magnetopause-to-Aurora Global Exploration
IMF
interplanetary magnetic field
IMP-8
Interplanetary Monitoring Platform (8)
ISAS
Institute of Space and Astronautical Science (Japan)
ISM
interstellar medium; also, Interstellar Sampler Mission
ISP
In-Space Propulsion
ITAR
International Traffic in Arms Regulations
JPM
Jupiter Polar Mission
L1
Lagrangian point 1
lidar
light detection and ranging
LISM
local interstellar medium
LWS
Living With a Star (NASA)
MagCon
Magnetospheric Constellation
MDI
Michelson Doppler Imager
MEMS
microelectromechanical systems
MESSENGER
Mercury Surface, Space Environment, Geochemistry, and RangingMHD
magnetohydrodynamic
MHM
Multispacecraft Heliospheric Mission
MIDEX
Medium-Class Explorer
MMS
Magnetospheric Multiscale
MO&DA
mission operations and data analysis
MRX
Magnetic Reconnection Experiment
NASA
National Aeronautics and Space Administration
NOAA
National Oceanic and Atmospheric Administration
NRA
NASA research announcement
NRC
National Research Council
NSF
National Science Foundation
NSO
National Solar Observatory
NSWP
National Space Weather Program
ONR
Office of Naval Research
OSS
Office of Space Science (NASA)
PI
principal investigator
PIDDP
Planetary Instrument Definition and Development Program
PSBL
plasma sheet boundary layer
PVO
Pioneer Venus Orbiter
RAO
Relocatable Atmospheric Observatory
RTG
radioisotope thermoelectric generator
SAMPEX
Solar Anomalous and Magnetospheric Particle Explorer
SDO
Solar Dynamics Observatory
SEC
Sun-Earth Connection program
SEP
solar energetic particle
SHINE
Solar, Heliospheric, and Interplanetary Environment
SMEX
Small Explorer
SMI
Stereo Magnetospheric Imager
SO
Solar Orbiter
SOFIA
Stratospheric Observatory for Infrared Astronomy
SOHO
Solar and Heliospheric Observatory
SR&T
Supporting Research and Technology
SSX
Swarthmore Spheromak Experiment
STEP
Solar-Terrestrial Energy Program
STEREO
Solar Terrestrial Relations Observatory
STP
Solar Terrestrial Probes (NASA)
SWS
Solar Wind Sentinels
SXI
Solar X-ray Imager
TEC
total electron content
TIMED
Thermosphere Ionosphere Mesosphere Energetics and Dynamics
TRACE
Transition Region and Coronal Explorer
TWINS
Two Wide-Angle Imaging Neutral-Atom Spectrometers
UA
Upper Atmosphere base program
UNEX
University-Class ExplorerUV
ultraviolet