| AA |
Associate Administrator |
| AAAC |
Astronomy and Astrophysics Advisory Committee |
| ACE |
Advanced Composition Explorer |
| AGs |
assessment groups |
| AIM |
Aeronomy of Ice in the Mesosphere |
| AirMOSS |
Airborne Microwave Observatory of Subcanopy and Subsurface |
| ALMA |
Atacama Large Millimeter Array |
| ARTEMIS |
Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon’s Interaction with the Sun |
| AST |
NSF Astronomical Sciences Division |
| ASTER |
Advanced Spaceborne Thermal Emission and Reflection Radiometer |
| Astro2000 |
2000 astronomy decadal survey: Astronomy and Astrophysics in the New Millennium |
| Astro2010 |
2010 astronomy and astrophysics decadal survey: New Worlds, New Horizons in Astronomy and Astrophysics |
| ATTREX |
Airborne Tropical Tropopause Experiment |
| CAA |
Committee on Astronomy and Astrophysics |
| CALIPSO |
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations |
| CAPTEM |
Curation and Analysis Planning Team for Extraterrestrial Materials |
| CARVE |
Carbon in Arctic Reservoirs Vulnerability Experiment |
| CATE |
cost and technical evaluation |
| CEOS |
Committee on Earth Observing Systems |
| CGRO |
Compton Gamma Ray Observatory |
| CINDI |
Coupled Ion-Neutral Dynamics Investigation |
| CoBRA |
Complexity Based Risk Assessment |
| ConX |
Constellation-X Observatory |
| COPAG |
Cosmic Origins Program Analysis Group |
| COSPAR |
Committee on Space Research |
| CSA |
Canadian Space Agency |
| CYGNSS |
Cyclone Global Navigation Satellite System |
| DISCOVER-AQ |
Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality |
| DKIST |
Daniel K. Inouye Solar Telescope |
| DOE |
Department of Energy |
| DOI |
Department of the Interior |
| DRIVE |
Diversify, Realize, Integrate, Venture, Educate |
| DSN |
Deep Space Network |
| Earth2007 |
2007 Earth science and applications from space decadal survey: Earth Science and Applications from Space: National Imperatives for the Next Decade and Beyond |
| EO-1 |
Earth Observing-1 |
| EOS |
Earth Observing System |
| ESA |
European Space Agency |
| EXIST |
Energetic X-ray Survey Telescope |
| FACA |
Federal Advisory Committee Act |
| FY |
fiscal year |
| G-MOWG |
Geospace Management Operations Working Group |
| GMT |
Giant Magellan Telescope |
| GOLD |
Global-Scale Observations of the Limb and Disk |
| GP-B |
Gravity Probe-B |
| GPM |
Global Precipitation Measurement |
| GRACE |
Gravity Recovery and Climate Experiment |
| GRACE FO |
Gravity Recovery and Climate Experiment Follow On |
| GSMT |
Giant Segmented Mirror Telescope |
| Helio2013 |
2013 solar and space physics decadal survey: Solar and Space Physics: A Science for a Technological Society |
| HEOMD |
NASA Human Exploration and Operations Mission Directorate |
| HS-3 |
Hurricane and Severe Storm Sentinel |
| HST |
Hubble Space Telescope |
| IBEX |
Interstellar Boundary Explorer |
| ICESat-2 |
Ice, Cloud, and Land Elevation Satellite-2 |
| ICON |
Ionospheric Connection Explorer |
| IIP |
Instrument Incubator Program |
| IRIS |
Interface Region Imaging Spectrograph |
| ISG |
infrastructure study group |
| ISSI |
International Space Station Institute |
| IXO |
International X-ray Observatory |
| JAXA |
Japan Aerospace Exploration Agency |
| JEO |
Jupiter Europa Orbiter |
| JUICE |
Jupiter Icy Moon Explorer |
| JWST |
James Webb Space Telescope |
| LADEE |
Lunar Atmosphere and Dust Environment Explorer |
| LEAG |
Lunar Exploration Analysis Group |
| LISA |
Laser Interferometer Space Antenna |
| LRO |
Lunar Reconnaissance Orbiter |
| LSST |
Large Synoptic Survey Telescope |
| LWS |
Living With a Star |
| LWS-MOWG |
Living With a Star Management Operations Working Group |
| MAVEN |
Mars Atmosphere and Volatile EvolutioN Mission |
| MAX-C |
Mars Astrobiology Explorer-Cacher |
| MEPAG |
Mars Exploration Program Analysis Group |
| MER |
Mars Exploration Rover (Spirit and Opportunity) |
| MESSENGER |
MErcury Surface, Space ENvironment, GEochemistry, and Ranging |
| MGN |
Magellan (Venus Radar Mapper) |
| MMS |
Magnetospheric Multiscale Mission |
| MO |
Mars Observer |
| MOO |
Mission of Opportunity |
| MOWG |
management operations working group |
| MREFC |
NSF Major Research Equipment and Facilities Construction |
| MRI |
Major Research Instrumentation |
| MRO |
Mars Reconnaissance Orbiter |
| MSL |
Mars Science Laboratory |
| MSR |
Mars Sample Return |
| NAC |
NASA Advisory Council |
| NAFCOM |
NASA/Air Force Cost Model |
| NASA |
National Aeronautics and Space Administration |
| NEO |
Near-Earth Object |
| NF4 |
New Frontiers 4 |
| NF5 |
New Frontiers 5 |
| NICER |
Neutron Star Interior Composition Explorer |
| NOAA |
National Oceanic and Atmospheric Administration |
| NPOESS |
National Polar-Orbiting Operational Environmental Satellite System |
| NRC |
National Research Council |
| NSF |
National Science Foundation |
| NuSTAR |
Nuclear Spectroscopic Telescope Array |
| OCO-2 |
Orbiting Carbon Observatory-2 |
| OMB |
Office of Management and Budget |
| OPAG |
Outer Planets Analysis Group |
| OSIRIS-REx |
Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer |
| OSTM |
Ocean Surface Topography Mission |
| OSTP |
Office of Science and Technology Policy |
| PDR |
preliminary design review |
| PDS |
Planetary Data System |
| PI |
principal investigator |
| Planetary2011 |
2011 planetary science decadal survey: Vision and Voyages for Planetary Science in the Decade 2013-2022 |
| PPP |
program prioritization panel |
| PSD |
NASA Planetary Science Division |
| QuikSCAT |
Quick Scatterometer |
| R&A |
research and analysis activities |
| RFI |
request for information |
| RHESSI |
Reuven Ramaty High Energy Solar Spectroscopic Imager |
| ROSES |
research opportunities in space and Earth sciences |
| SAFIR |
Single Aperture Far-InfraRed observatory |
| SAGE III |
Stratospheric Aerosol and Gas Experiment |
| SBAG |
Small Bodies Analysis Group |
| SDO |
Solar Dynamics Observatory |
| SFP |
science frontier panel |
| SH-MOWG |
Solar-Heliosphere Management Operations Working Group |
| SIM |
Space Interferometry Mission; originally proposed in the 1990 astronomy decadal survey as AIM: Astronomical Interferometry Mission |
| SMAP |
Soil Moisture Active-Passive |
| SMD |
NASA Science Mission Directorate |
| SOC |
Spacecraft Operations Centre |
| SOFIA |
Stratospheric Observatory for Infrared Astronomy |
| SOHO |
Solar and Heliospheric Observatory |
| SORCE |
Solar Radiation and Climate Experiment |
| SPP |
Solar Probe Plus |
| SRA |
supporting research and analysis |
| SSB |
Space Studies Board |
| STEREO |
Solar Terrestrial Relations Observatory |
| STMD |
NASA Space Technology Mission Directorate |
| STP |
Solar Terrestrial Probe |
| Suomi NPP |
Suomi National Polar-orbiting Partnership |
| SWOT |
Surface Water Ocean Topography Mission |
| TEMPO |
Tropospheric Emissions: Monitoring of Pollution |
| TESS |
Transiting Exoplanet Survey Satellite |
| THEMIS |
Time History of Events and Macroscale Interactions during Substorms |
| TIMED |
Thermosphere Ionosphere Mesosphere Energetics and Dynamics |
| TMT |
Thirty Meter Telescope |
| TOPEX/POSEIDON |
Topography Experiment/Poseidon |
| TPF |
Terrestrial Planet Finder |
| TRMM |
Tropical Rainfall Measuring Mission |
| TWINS |
Two Wide-Angle Imaging Neutral-Atom Spectrometers |
| UARS |
Upper Atmosphere Research Satellite |
| USGS |
U.S. Geological Survey |
| VEXAG |
Venus Exploration Analysis Group |
| VGR |
Voyager |
| VLA |
Very Large Array |
| VLBA |
Very Long Baseline Array |
| WBS |
work breakdown structure |
| WFIRST |
Wide-Field Infrared Survey Telescope |
| XMM-Newton |
X-ray Multi-Mirror Mission Newton |
