A
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AA
|
Associate Administrator
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AAAC
|
Astronomy and Astrophysics Advisory Committee
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ACE
|
Advanced Composition Explorer
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ACT
|
Advanced Component Technology
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AFTA
|
Astrophysics Focused Telescope Assets
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AIM
|
Aeronomy of Ice in the Mesosphere
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AIST
|
Advanced Information Systems Technologies
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AMSU-A
|
Advanced Microwave Sounding Unit-A
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AO
|
Announcement of Opportunity
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|
APRA
|
Astrophysics Research and Analysis
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ARSET
|
Applied Remote SEnsing Training
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ARTEMIS
|
Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon’s Interaction with the Sun probes
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ASAG
|
Applied Sciences Advisory Group
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ASCENDS
|
Active Sensing of CO2 over Nights, Days and Seasons
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ATI
|
Advanced Technology Initiatives
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ATTREX
|
Airborne Tropical Tropopause Experiment
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AU
|
Astronomical Unit
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AVHRR
|
Advanced Very High Resolution Radiometer
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B
|
There is no content for this letter.
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C
|
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CALIPSO
|
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations
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CARVE
|
Carbon in Arctic Reservoirs Vulnerability Experiment
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CASI
|
Climate Adaptation Science Investigators
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CATS
|
Cloud-Aerosol Transport System
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CBP
|
Capacity Building Program
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CCAP
|
NASA’s 2010 Climate-Centric Architecture Plan
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CCMC
|
Community Coordinated Modeling Center
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CENRS
|
Committee on Environment, Natural Resources, and Sustainability
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CERES
|
Cloud and the Earth’s Radiant Energy System
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CIF
|
Center Innovation Fund
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CINDI
|
Coupled Ion-Neutral Dynamics Investigations
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CLARREO
|
Climate Absolute Radiance and Refractivity Observatory
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CNES
|
Centre National d’Etudes Spatiale (French Space Agency)
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CO2
|
Carbon dioxide
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CoSTEM
|
Committee on Science Technology, Engineering and Math Education
|
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CRaTER
|
LRO Cosmic Ray Telescope for the Effects of Radiation instrument
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CREAM
|
Cosmic Ray Energetics and Mass
|
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CSA
|
Canadian Space Agency
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CSLI
|
CubeSat Launch Initiative
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CYGNSS
|
Cyclone Global Navigation Satellite System
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D
|
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DAAC
|
Distributed Active Archive Centers
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DISCOVER-AQ
|
Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality
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DLR
|
Deutsches Zentrum für Luft- und Raumfahrt (national aeronautics and space research center of the Federal Republic of Germany)
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DOD
|
Department of Defense
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DOE
|
Department of Energy
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DRIVE
|
Diversify, Realize, Integrate, Venture, Educate
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DS
|
Decadal Survey
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DSCOVR
|
Deep Space Climate Observatory
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DWSS
|
Defense Weather Satellite System
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E
|
|
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E/PO
|
Education and Public Outreach
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EAR
|
Export Administration Regulations
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EDLS
|
Entry, Descent, Landing System
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ELV
|
Expendable Launch Vehicle
|
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EM
|
Exploration Mission
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EO-1
|
Earth Observing–1
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EOPM
|
End of Prime Mission
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EOS
|
Earth Observing System
|
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EOSDIS
|
EOS Data and Information System
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EPA
|
Environmental Protection Agency
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ESA
|
European Space Agency
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ESD
|
Earth Science Division
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ESM
|
Earth Systematic Missions
|
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ESSP
|
Earth System Science Pathfinder
|
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ESTO
|
Earth Science Technology Office
|
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EUMETSAT
|
European Organisation for the Exploitation of Meteorological Satellites
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EVI
|
Earth Venture Instrument
|
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EVM
|
Earth Venture Mission
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EVS
|
Earth Venture Suborbital
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F
|
|
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FAA
|
Federal Aviation Administration
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FM
|
Foundation Mission
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FO
|
Follow-on
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FY
|
Fiscal Year
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G
|
|
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GACM
|
Global Atmospheric Composition Mission
|
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GAO
|
Government Accountability Office
|
|
GCIS
|
Global Change Information System
|
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GCOM-W1
|
Global Change Observation Mission – Water satellite, also known as the SHIZUKU (JAXA)
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GEMS
|
Gravity and Extreme Magnetism Small Explorer
|
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GEO
|
Geostationary orbit
|
|
GEO-CAPE
|
Geostationary Coastal and Air Pollution Events
|
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GEOS
|
Goddard Earth Observing System
|
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GOES
|
Geostationary Operational Environmental Satellite
|
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GOLD
|
Global-scale Observations of the Limb and Disk
|
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GOMI
|
Gulf of Mexico Initiative
|
|
GPM
|
Global Precipitation Measurement
|
|
GPS
|
Global Positioning System
|
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GRACE
|
Gravity Recovery and Climate Experiment
|
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GRACE FO
|
Gravity Recovery and Climate Experiment Follow-on
|
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GRAIL
|
Gravity Recovery and Interior Laboratory
|
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GRB
|
Gamma-ray burst
|
H
|
|
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HEOMD
|
Human Exploration and Operations Mission Directorate (NASA)
|
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H-GCR
|
Heliophysics-Grand Challenges Research
|
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H-GI
|
Heliophysics-Guest Investigator
|
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HICO
|
Hyperspectral Imager for the Coastal Ocean
|
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HS3
|
Hurricane and Severe Storm Sentinel
|
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HSO
|
Heliophysics System Observatory
|
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HST
|
Hubble Space Telescope
|
|
HTIDeS
|
Heliophysics Technology and Instrument Development for Science
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I
|
|
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IBEX
|
Interstellar Boundary Explorer
|
|
ICEsat-2
|
Ice, Clouds and land Elevation Satellite-2
|
|
ICON
|
Ionospheric Connection
|
|
IIP
|
Instrument Incubator Program
|
|
IR
|
Infrared
|
|
IRIS
|
Interface Region Imaging Spectrograph
|
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ISERV
|
ISS SERVIR Environmental Research and Visualization System
|
|
ISS
|
International Space Station
|
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ITAR
|
International Traffic in Arms Regulations
|
|
IXO
|
International X-ray Observation
|
J
|
|
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JASD
|
Joint Agency Satellite Division
|
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JASON
|
Joint Altimetry Satellite Oceanography Network
|
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JAXA
|
Japanese Space Agency (Japan Aerospace Exploration Agency)
|
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JPSS
|
Joint Polar Satellite System
|
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JUICE
|
Jupiter Icy Moons Explorer (ESA)
|
K
|
|
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KDP
|
Key Decision Point
|
L
|
|
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L1
|
Lagrange point 1
|
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LADEE
|
Lunar Atmosphere and Dust Environment Explorer
|
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LCAS
|
Low-Cost Access to Space
|
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LCC
|
life cycle cost
|
|
LDCM
|
Landsat Data Continuity Mission
|
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LEO
|
Low Earth Orbit
|
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LIS
|
Lightning Imaging Sensor
|
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LISA
|
Laser Interferometer Space Antenna
|
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LIST
|
Lidar Surface Topography
|
|
LMSSC
|
Lockheed Martin Space Systems Company
|
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LRD
|
Launch Readiness Date
|
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LRO
|
Lunar Reconnaissance Orbiter
|
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LWS
|
Living With a Star
|
M
|
|
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MatISSE
|
Maturation of Instruments for Solar System Exploration
|
|
MAVEN
|
Mars Atmosphere and Volatile Evolution
|
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MAX-C
|
Mars Astrobiology Explorer-Cacher
|
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MEP
|
Mars Exploration Program
|
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MESSENGER
|
Mercury Surface, Space Environment, Geochemistry and Ranging
|
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MetOp
|
Meteorological Operational
|
|
MMS
|
Magnetospheric Multiscale
|
|
MOMA
|
Mars Organic Molecule Analyzer
|
|
MOMA-MS
|
Mars Organic Molecule Analyzer Mass Spectrometer
|
|
MRO
|
Mars Reconnaissance Orbiter
|
|
MSL
|
Mars Science Laboratory
|
N
|
|
|
N/A
|
Not applicable
|
|
NAC
|
NASA Advisory Council
|
|
NAI
|
NASA Astrobiology Institute
|
|
NASA
|
National Aeronautics and Space Administration
|
|
NEO
|
Near-Earth Object
|
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NEOWISE
|
Near-Earth Object Wide-field Infrared Survey Explorer
|
|
NESSF
|
NASA Earth and Space Science Fellowship
|
|
NET
|
No earlier than
|
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NEX
|
NASA Earth Exchange
|
|
NIAC
|
NASA Innovative Advanced Concepts
|
|
NICER
|
Neutron Star Interior Composition Explorer
|
|
NI-SAR
|
NASA-India Space Research Organization Synthetic Aperture Radar
|
|
NLT
|
No later than
|
|
NOAA
|
National Oceanic and Atmospheric Administration
|
|
NPOESS
|
National Polar-orbiting Operational Environmental Satellite System
|
|
NPP
|
National Polar-Orbiting Partnership
|
|
NRA
|
NASA Research Announcement
|
|
NRC
|
National Research Council
|
|
NRO
|
National Reconnaissance Office
|
|
NSF
|
National Science Foundation
|
|
NSTC
|
National Science and Technology Council
|
|
NuSTAR
|
Nuclear Spectroscopic Telescope Array
|
O
|
|
|
OCE
|
Office of the Chief Engineer
|
|
OCO
|
Orbiting Carbon Observatory
|
|
OCT
|
Office of the Chief Technologist
|
|
OMPS
|
Ozone Mapper and Profiler Suite
|
|
ORS-3
|
Operationally Responsive Space-3
|
|
OSC
|
Orbital Sciences Corporation
|
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OSIRIS-REx
|
Origins, Spectral Interpretation, Resource Identification, Security Regolith Explorer
|
|
OSTM
|
Ocean Surface Topography Mission
|
P
|
|
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PACE
|
Pre-Aerosol, Cloud, ocean Ecosystem
|
|
PATH
|
Precipitation and All-weather Temperature and Humidity
|
|
PDS
|
Planetary Data System
|
|
PI
|
Principal Investigator
|
|
PICASSO
|
Planetary Instrument Concepts for the Advancements of Solar System Observations
|
|
POES
|
Polar-orbiting Operational Environmental Satellites
|
Q
|
There is no content for this letter.
|
R
|
|
|
R&A
|
Research and analysis
|
|
RapidScat
|
Rapid Scatterometer
|
|
RBI
|
Radiation Budget Investment
|
|
RBSP
|
Radiation Belt Storm Probes
|
|
REDDI
|
Research, Development, Demonstration, and Infusion
|
|
RHESSI
|
Reuven Ramaty High Energy Solar Spectroscope Imager
|
|
ROSES
|
Research Opportunities in the Space and Earth Sciences
|
|
RPP
|
Reimbursable Projects Program
|
|
RPS
|
Radioisotope Power System
|
S
|
|
|
SAGE
|
Stratospheric Aerosol and Gas Experiment
|
|
SAR
|
Synthetic Aperture Radar
|
|
SARA
|
Service and Advice for Research and Analyses
|
|
SAT
|
Strategic Astrophysics Technology
|
|
SBIR
|
Small Business Innovative Research
|
|
SCLP
|
Snow and Cold Land Processes
|
|
SDO
|
Solar Dynamics Observatory
|
|
SDT
|
Science Definition Team
|
|
SEM
|
Space Environment Monitor
|
|
SEPOF
|
Science Education and Public Outreach Forum
|
|
SET
|
Space Environment Testbed
|
|
SEXTANT
|
Station Explorer for X-ray Timing and Navigation
|
|
SI
|
International System of Units
|
|
SLS
|
Space Launch System
|
|
SMAP
|
Soil Moisture Active/Passive
|
|
SMD
|
Science Mission Directorate
|
|
SOC
|
Solar Orbiter Collaboration
|
|
SOFIA
|
Stratospheric Observatory For Infrared Astronomy
|
|
SOHO
|
Solar and Heliospheric Observatory
|
|
SORCE
|
Solar Radiation and Climate Experiment
|
|
SpaceX
|
Space Explorations Technology Corporation
|
|
SPICA
|
Space Infrared Telescope for Cosmology and Astrophysics
|
|
SPP
|
Solar Probe Plus
|
|
SSERVI
|
Solar System Exploration Research Virtual Institute
|
|
STEM
|
Science, Technology, Engineering and Mathematics
|
|
STEREO
|
Solar Terrestrial Relations Observatory
|
|
STMD
|
Space Technology Mission Directorate
|
|
STP
|
Solar Terrestrial Probes
|
|
STRG
|
Space Technology Research Grants
|
|
STTR
|
Small Business Technology Transfer
|
|
Suomi NPP
|
Suomi National Polar-orbiting Partnership
|
|
SWOT
|
Surface Water and Ocean Topography
|
T
|
|
|
TBD
|
To be determined
|
|
TCTE
|
TSI (Total Solar Irradiance) Calibration Transfer Experiment
|
|
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
|
|
TIROS
|
Television Infrared Observation Satellite
|
|
TRL
|
Technology Readiness Level
|
|
TRMM
|
Tropical Rainfall Measuring Mission
|
|
TSI
|
Total Solar Irradiance
|
|
TSIS
|
Total Solar Irradiance Sensor
|
|
TWINS
|
Two Wide-angle Imaging Neutral Atom Spectrometers
|
U
|
|
|
U.S.
|
United States
|
|
UHF
|
Ultra-High Frequency
|
|
ULA
|
United Launch Alliance
|
|
ULDB
|
Ultra Long Duration Balloon
|
|
UN
|
United Nations
|
|
USAF
|
United States Air Force
|
|
USAID
|
United States Agency for International Development
|
|
USDA
|
United States Department of Agriculture
|
|
USGCRP
|
United States Global Change Research Program
|
|
USGS
|
United States Geological survey
|
|
UV
|
ultraviolet
|
V
|
There is no content for this letter.
|
W
|
|
|
Webb
|
James Webb Space Telescope
|
|
WFIRST
|
Wide-Field Infrared Survey Telescope
|
|
WISE
|
Wide-field Infrared Survey Explorer
|
X
|
|
|
XMM
|
X-ray Multi-Mirror Mission
|
Y
|
There is no content for this letter.
|
Z
|
There is no content for this letter.
|
