The United States shall 

“Lead an innovative and sustainable program of exploration with 

commercial and international partners to enable human expansion across 

the solar system and to bring back to Earth new knowledge and 

opportunities. Beginning with missions beyond low-Earth orbit, the United 

States will lead the return of humans to the Moon for long-term exploration 

and utilization, followed by human missions to Mars and other 

destinations.”

- Presidential Space Policy Directive 1

NASA is

Ø Enabling U.S. Global Leadership: Our scientific, technological, 

aeronautics and space exploration efforts are uniquely visible 

expressions of American leadership

Ø Extending Human Presence Deeper into Space Starting with the Moon 

for Long-term Exploration and Utilization

Ø Expanding Human Knowledge Through New Scientific Discoveries

Ø Addressing National Challenges that Catalyze Economic Growth

Ø Improving Capabilities and Operations

NASA and American Leadership

1
2019 Budget Highlights

Ø Provides $19.9B, including $10.5B to lead an 

innovative and sustainable campaign of 

exploration and lead the return of humans to 

the Moon for long-term exploration and 

utilization followed by human missions to 

Mars and other destinations.

Ø Refocuses existing NASA activities towards 

exploration, by redirecting funding to 

innovative new programs and providing 

additional funding to support new public-

private initiatives.

Ø Conducts uncrewed SLS/Orion first flight in 

2020, leading to Americans around the Moon 

in 2023. This will be the first human mission 

to the moon since Apollo 17 in 1972, and will 

establish U.S. leadership in cislunar space.

2
Highlights (continued)

Ø Serves as a catalyst for growth of a vibrant 

American commercial space industry expanding 

commercial partnerships to strengthen U.S. 

leadership in space. 

Ø Achieves early Human Exploration milestone by 

establishing a Lunar Orbital Platform-Gateway in 

cislunar space; launching a power and propulsion 

space tug in 2022.

Ø Develops a series of progressively more capable 

robotic lunar missions to the surface of the moon 

using innovative acquisition approaches while 

meeting national exploration and scientific 

objectives.

Ø Begins transition to commercialization of low 

Earth orbit and ends direct federal government 

support of the International Space Station in 

2025.

Ø Begins a new $150M program to encourage 

development of new commercial Low Earth orbital 

platforms and capabilities for use by the private 

sector and NASA

3
Highlights (continued)

Ø Continues robotic exploration of the Solar 

System including funding for the next Mars 

rover launch in 2020, funding to explore 

possibilities of returning geological samples 

from Mars and a Europa Clipper mission to fly 

repeatedly by Jupiter’s icy ocean moon Europa.

Ø Enables our wide-ranging science work on 

many fronts, which continues to lead the world 

in its size, scope, and scientific output. 

Ø Supports a focused Earth science program; no 

funding for missions proposed for termination in 

FY18 budget (PACE, OCO-3, CLARREO 

Pathfinder, DSCOVR, and RBI).

Ø Continues exploring the universe with launch of 

James Webb Space Telescope.

Ø Cancels WFIRST due to its significant cost and 

higher priorities within NASA. Increases funding 

for competed astrophysics missions and 

research. 

4
Highlights (continued)

Ø Focuses and integrates space technology 

investments to enable new robotic and human 

exploration capabilities and missions and 

contribute to economic development and growth 

by enabling innovative systems and services 

supporting the emerging space economy. 

Ø Fully funds a supersonic X-plane and increases 

hypersonics research funding. Maintains robust 

investment in air traffic management 

improvements that will safely increase air traffic 

capacity, reduce flight delays, and enable safe, 

robust UAS integration. 

Ø Redirects Office of Education funding to new 

initiatives supporting NASA’s core mission of 

exploration. 

Ø Strengthens cybersecurity capabilities, 

safeguarding critical systems and data, and

continues to support improved overall 

management of IT. 

5
Anticipated Accomplishments 

in FY 2019

Exploration	Systems	

Continues	systems	

integration	in	

preparation	for	Ascent	

Abort	test	in	April	2019	

and	EM-1	launch.

Advanced	Exploration	Systems

Power	propulsion	element	

requirements	studies,	acquisition	

planning,	and	partnership	approaches.	

Ground	testing	of	full	size	prototype	

cislunar habitats.

James	Webb	Space	Telescope

Completes	assembly	and	

testing,	ships	to	French	Guiana,	

and	launches	between	March	

and	June	of	2019.

Other	Science

Use	of	emerging	commercial	lunar	

lander	capabilities	to	deliver	payloads	to	

surface	of	the	Moon.	Selects	next	New	

Frontiers	mission,	Heliophysics	Small	

Explorer,	Astrophysics	Medium	Explorer	

and	suite	of	Earth	Venture	Suborbital-3	

investigations.

Exploration	R&T

Launches	3	payloads	demonstrating	laser	

comm,	green	propellant,	and	precision	

navigation.	Delivers	MOXIE,	MEDA,	MEDLI2,	

and	TRN	to	Mars	2020	mission. 6

Commercial	

Crew

Completes	

developmental	

milestones	and	

plans	for	post	

certification	

missions	to	

begin	in	2019.

Supersonic	X-Plane

Completes	a	critical	design	

review	for	the	Low	Boom	

Flight	Demonstrator
FY 2019 Budget Request ($M)

FY 2017 reflects funding amounts specified in Public Law 115-31, Consolidated Appropriations Act, 2017. Table does not reflect emergency supplemental funds also 

appropriated in FY 2017, totaling $184 million.

FY 2018 reflects Continuing Resolution funding as enacted under Public Law 115-56, as amended.. 

7

2017 2018 2019 2020 2021 2022 2023

$19,653.3 $19,519.8 $19,892.2 $19,592.2 $19,592.2 $19,592.2 $19,592.2

$4,184.0 $4,222.6 $4,558.8 $4,859.1 $4,764.5 $4,752.5 $4,769.8

$3,929.0 $3,669.8 $3,790.5 $3,820.2 $3,707.5 $3,845.6

$97.8 $889.0 $1,068.6 $944.3 $1,045.0 $924.1

$157.2 $0.0 $0.0 $0.0 $0.0 $0.0

$826.5 $820.8 $1,002.7 $912.7 $912.7 $912.7 $912.7

$4,942.5 $4,850.1 $4,624.6 $4,273.7 $4,393.3 $4,430.3 $4,438.0

$1,450.9 $1,462.2 $1,453.2 $1,471.2 $1,466.2 $1,451.2

$2,589.0 $2,108.7 $1,829.1 $1,858.9 $1,829.2 $1,807.3

$902.6 $903.7 $841.4 $888.2 $934.9 $954.6

$0.0 $150.0 $150.0 $175.0 $200.0 $225.0

$5,762.2 $5,725.8 $5,895.0 $5,859.9 $5,841.1 $5,822.4 $5,803.6

$1,907.7 $1,784.2 $1,784.2 $1,784.2 $1,784.2 $1,784.2

$1,827.5 $2,234.7 $2,199.6 $2,180.8 $2,162.1 $2,143.3

$1,352.3 $1,185.4 $1,185.4 $1,185.4 $1,185.4 $1,185.4

$674.7 $690.7 $690.7 $690.7 $690.7 $690.7

$656.0 $655.5 $633.9 $608.9 $608.9 $608.9 $608.9

$100.0 $99.3 $0.0 $0.0 $0.0 $0.0 $0.0

$2,768.6 $2,749.8 $2,749.7 $2,744.8 $2,738.6 $2,732.3 $2,726.1

$1,986.5 $1,949.6 $1,945.4 $1,939.8 $1,934.1 $1,928.5

$782.1 $800.1 $799.4 $798.8 $798.2 $797.6

$375.6 $358.3 $388.2 $293.8 $293.8 $293.8 $293.8

$305.4 $305.3 $210.9 $210.9 $210.9 $210.9

$70.2 $82.9 $82.9 $82.9 $82.9 $82.9

$37.9 $37.6 $39.3 $39.3 $39.3 $39.3 $39.3

$19,653.3 $19,519.8 $19,892.2 $19,592.2 $19,592.2 $19,592.2 $19,592.2

Environmental Compliance and Restoration

Inspector General

NASA TOTAL

Safety, Security, and Mission Services

Center Management and Operations

Agency Management and Operations

Construction & Envrmtl Compl Restoration

Construction of Facilities

Heliophysics

Aeronautics

Education

Commercial LEO Development 

Science

Earth Science

Planetary Science

Astrophysics

LEO and Spaceflight Operations

International Space Station 

Space Transportation

Space and Flight Support (SFS)

Deep Space Exploration Systems

Exploration Systems Development

Advanced Exploration Systems

Exploration Research and Development

Exploration Research and Technology

Notional

Budget Authority ($ in millions)

NASA TOTAL

Fiscal Year
NASA Mission Launches

(Fiscal Years 2018 – 2023)

8
9

The Lunar Exploration Campaign
10

The Lunar Exploration Campaign

*	*	Timeline	 Timeline	 to	be	developed	during	FY	 to	be	developed	during	FY	 2019 2019
11

Ø Prioritize human exploration and related activities

Ø Expand Exploration by 

Ø Providing funding to start transition of low Earth orbit human space flight 

operations to commercial partners 

Ø Pursuing a Cislunar strategy that establishes U.S. preeminence to, 

around, and on the Moon, including commercial partnerships and 

innovative approaches, to achieve human and science exploration goals

Exploration Campaign

*Elements	of	Science	includes	funding	for	the	new	Lunar	Exploration	and	Discovery	program	and	technology	development	and	studies related	

to	future	exploration-related	Mars	missions.	

Enacted CR Request

2017 2018 2019 2020 2021 2022 2023

$4,184.0 $4,222.6 $4,558.8 $4,859.1 $4,764.5 $4,752.5 $4,769.8

$826.5 $820.8 $1,002.7 $912.7 $912.7 $912.7 $912.7

$4,942.5 $4,850.1 $4,624.6 $4,273.7 $4,393.3 $4,430.3 $4,438.0

$45.5 $22.4 $44.8 $0.0 $0.0 $0.0 $0.0

$39.0 $36.0 $268.0 $268.0 $268.0 $268.0 $268.0

EXPLORATION CAMPAIGN TOTAL $10,037.5 $9,951.9 $10,498.9 $10,313.5 $10,338.5 $10,363.5 $10,388.5

Exploration Campaign CoF

Elements of Science

LEO and Spaceflight Operations

Fiscal Year

Notional

Budget Authority ($ in millions)

Deep Space Exploration Systems

Exploration Research and Technology
Deep Space Exploration Systems:

Exploration Systems Development

ØProvides funding for SLS, Orion and EGS to 

prepare for Exploration Mission (EM-1), the first 

pairing of Orion, with cubesat secondary 

payloads and SLS and EM-2, the first crewed 

mission. 

ØEnables humans back to the vicinity of the 

Moon in 2023.

ØProvides for mating of Orion’s major 

components (Launch Abort System, Orion 

Crew Module, and Service Module) and 

delivering to Ground Operations for final 

preparation and stacking at KSC.

ØBegins final assembly of the components for 

EM-1 by integrating the Interim Cryogenic 

Propulsion Stage (ICPS), Launch Vehicle Stage 

Adapter (LVSA) and Boosters including the 

Solid Rocket Motor Segments. 

ØValidates all EGS software and hardware.

Outyears	are	notional

($M) 2019 2020 2021 2022 2023

ESD $3,670 $3,791 $3,820 $3,708 $3,846

12
Deep Space Exploration Systems:

Advanced Exploration Systems

ØLeads Exploration Campaign with new cislunar 

capabilities utilizing innovative public-private 

partnerships. 

ØPioneers new human spaceflight systems 

development , including habitation capabilities and 

systems, crew mobility systems, vehicle systems, 

autonomous systems, and robotic precursors for 

future human missions beyond low Earth orbit.

ØEstablishes a Lunar Orbital Platform (LOP) -

Gateway by the early 2020s. 

ØSupports launch of the Power and Propulsion 

Element on a commercial launch vehicle as the 

first component of the LOP - Gateway.

ØMoves Human Research Program to Exploration 

Research and Technology to better align with 

research portfolio.

Outyears	are	notional

($M) 2019 2020 2021 2022 2023

AES $889 $1,069 $944 $1,045 $924

13
Exploration Research and Technology

Ø Focuses investments in research and technologies applicable 

to deep-space exploration, prioritizing environmental control 

and life support; power and propulsion; advanced materials; 

communications; navigation and avionics, robotic assembly 

and manufacturing; entry, descent and landing; autonomous 

systems and enabling humans to live and work in the space.

Ø Delivers flight hardware for demonstration of in-situ resource 

utilization, and entry, descent and landing technologies for the 

Mars 2020 mission.

Ø Begins fabrication of flight hardware for high-powered solar 

electric propulsion system that will enable efficient in-orbit 

transfer and accommodate increasing power demands for 

satellites.

14

Outyears	are	notional

($M) 2019 2020 2021 2022 2023

Exp. R&T $1,003 $913 $913 $913 $913

Ø Completes Laser Communications Relay Demonstration mission payload to support 2019 launch readiness.

Ø Funds public-private partnerships to flight demonstrate robotic in-space manufacturing technologies used to 

build large structures in a space environment.

Ø Delivers 2 CubeSats selected via NEXTStep Phase One, and 3 robotic precursor technologies missions, and 2 

Pathfinder Technology flight Demonstrator missions.

Ø Continues cutting edge research on the effects of spaceflight to the human body using the ISS and supports 

Deep Space Exploration habitat design and development to ensure crew health and performance. 

Ø Continues pilot opportunities to accelerate small businesses ability to advance the commercial aerospace 

sector and NASA missions through the SBIR/STTR programs.
LEO and Spaceflight Operations:

International Space Station

Ø Proposes to end direct U.S. financial support for 

ISS in 2025, with a seamless transition to the use 

of future commercial capabilities.

Outyears	are	notional

Ø Continues ISS Focus Areas:

– Enable long-duration human deep space exploration via 

research and technology demonstrations

– Enable development and advancement of a commercial 

marketplace in low Earth orbit

– Return benefits to humanity on Earth through spacebased research and technology development

– Maintain U.S. global leadership of space exploration 

Ø Through use of the National Laboratory, supports 

above focus areas, expands the number of 

researchers and companies using ISS, and enables 

new public-private partnerships.

($M) 2019 2020 2021 2022 2023

ISS $1,462 $1,453 $1,471 $1,466 $1,451

15
LEO and Spaceflight Operations:

Space Transportation 

ØContinues NASA’s partnership with U.S. commercial 

space industry to regain capability to send 

astronauts into space safely, reliably, and affordably 

from American soil by 2019.

ØAssures U.S. crew and cargo transportation to the 

ISS, bolsters American leadership, and ends our 

dependence on Russian spaceflight capabilities for 

crew transportation.

ØEnables continued research and technology 

development on ISS by providing stable crew and 

cargo flight plan.

ØStimulates growth of the space transportation 

industry available to all potential customers, 

strengthening America’s space industrial base.

Outyears	are	notional

($M) 2019 2020 2021 2022 2023

Space	Transport $2,109 $1,829 $1,859 $1,829 $1,807

16
LEO and Spaceflight Operations:

Space and Flight Support

Ø Continues mission critical space communications and navigation services to 

customer missions, including human, science, and commercial crew and cargo 

missions. 

Outyears	are	notional

Ø Begins planning for the transition of the Space 

Network communications network to commercial 

partnerships and services.

Ø Supports readiness and crew health for all NASA 

human space flight endeavors.

Ø Provides safe, reliable, and cost-effective launch 

services for NASA payloads in FY 2019 and launch 

vehicle acquisition and advisory services to over 40 

NASA scientific spacecraft missions in various phases 

of development.

Ø Continues certification of new commercial launch 

vehicles.

Ø Provides NASA’s rocket testing capability to meet US 

rocket testing requirements and provides valuable 

propulsion data for EM-1 and EM-2.

($M) 2019 2020 2021 2022 2023

SFS $904 $841 $888 $935 $955

17
LEO and Spaceflight Operations:

Commercial LEO Development

18

($M) 2019 2020 2021 2022 2023

CLD $150 $150 $175 $200 $225

Ø Assists commercial space industry to 

develop a sustained commercial low 

earth orbit presence.

Ø Initiates planning to transition low Earth 

orbit human space flight operations to 

commercial partners.

Ø Encourages commercial development of 

platforms and capabilities for use by the 

private sector and NASA to enable a 

seamless transition from ISS.

Ø Increases efforts to facilitate developing a 

commercial space economy in LEO. 
Science: Earth Science

ØLaunches GRACE Follow-On, ICESat-2, ECOSTRESS, 

and GEDI. 

ØSupports formulation and development of Landsat-9, 

NISAR, SWOT, TEMPO, OMPS-L, Sentinel-6, and TSIS-2.

ØSelects Earth Venture Suborbital-3 investigations from the 

AOs released in 2016 and 2017. 

ØReleases AOs for Earth Venture Mission (EVM)-3, and 

Earth Venture Instrument (EVI)-6. 

($M) 2019 2020 2021 2022 2023

Earth	Science $1,784 $1,784 $1,784 $1,784 $1,784

Outyears	are	notional

Ø Operates 19 additional missions, and the Airborne Science project.

Ø Invests in CubeSats/SmallSats that can achieve entirely new science at lower 

cost.

Ø Plans to engage stakeholders in order to incorporate new Earth Science Decadal 

Survey recommendations into the Earth Science portfolio

Ø Proposes to terminate PACE, OCO-3, CLARREO Pathfinder, and DSCOVR. 

Following a detailed review in Jan. 2018, RBI has been cancelled and is not 

funded in this Budget. 19
Science: Planetary Science

Ø Creates a robotic Lunar Discovery and Exploration program, that supports commercial 

partnerships and innovative approaches to achieving human and science exploration 

goals. 

Ø Continues development of Mars 2020 and Europa Clipper.

Ø Establishes a Planetary Defense program, including the Double Asteroid Redirection 

Test (DART) and Near-Earth Object Observations.

Ø Studies a potential Mars Sample Return mission incorporating commercial 

partnerships. 

Ø Formulates the Lucy and Psyche missions.

Ø Selects the next New Frontiers mission.

Ø Invests in CubeSats/SmallSats that can achieve 

entirely new science at lower cost.

Ø Operates 10 Planetary missions. 

§ OSIRIS-REx will map asteroid Bennu.

§ New Horizons will fly by its Kuiper belt target.

Outyears	are	notional

Dawn	Image	of	Ceres	on	January	13,	2015

($M) 2019 2020 2021 2022 2023

Planetary	Science $2,235 $2,200 $2,181 $2,162 $2,143

20
Science: Astrophysics

Ø Supports the TESS exoplanet mission following launch by June 2018.

Ø Formulates or develops, IXPE, GUSTO, XARM, Euclid, and a new MIDEX mission to be 

selected in FY 2019.

Ø Operates ten missions and the balloon project.

Ø Invests in CubeSats/SmallSats that can achieve entirely new science at lower cost.

Ø All Astrophysics missions beyond prime operations (including SOFIA) will be subject to senior 

review in 2019.

Outyears	are	notional

($M) 2019 2020 2021 2022 2023

Astrophysics $1,185 $1,185 $1,185 $1,185 $1,185

21

Ø Launches the James Webb Space 

Telescope. 

Ø Moves Webb into the Cosmic Origins 

Program within the Astrophysics 

Account.

Ø Terminates WFIRST due to its significant 

cost and higher priorities elsewhere 

within NASA. Increases funding for 

future competed missions and research.
Science: Heliophysics

Ø Continues support of Parker Solar Probe, Ionospheric Connection Explorer 

(ICON), readying for launch in FY 2018 and recently launched Global-scale 

Observations of the Limb and Disk (GOLD).

Ø Continues Solar Orbiter Collaboration (SOC) partnership with ESA.

Ø Includes a $3 million increase for collaborating with other agencies to improve 

space weather observation and forecasting capabilities. 

Ø Invests in CubeSats/SmallSats that can achieve entirely new science at lower 

cost.

Ø Supports the Sounding Rockets 

and CubeSat projects.

Ø Operates 17 additional missions.

Outyears	are	notional

($M) 2019 2020 2021 2022 2023

Heliophysics $691 $691 $691 $691 $691

22
23

($M) 2019 2020 2021 2022 2023

Aeronautics $634 $609 $609 $609 $609

Ø Completes a critical design review of the Low 

Boom Flight Demonstrator X-Plane that will 

demonstrate quiet overland supersonic flight, 

which enables a new market for U.S. industry.

Ø Increases funding for hypersonic fundamental 

research which will enhance development of tools 

and methods to more efficiently design future 

hypersonic vehicles

Ø Continues to develop and mature key promising 

subsonic aircraft technologies that dramatically 

reduce fuel consumption, noise, and emissions.

Ø Advances electric propulsion systems by flight testing an all electric aircraft, the X-57.

Ø Develops and tests key technologies that will integrate UAS operations in the National Air 

Space, as well as realize safe, low-altitude operations of small UAS.

Ø Demonstrates new air traffic management tools that integrate aircraft arrival, departure, 

and airport surface operations to reduce flight delays and increase air traffic capacity and 

safety.

Ø Completes the Advanced Composites project which will deliver a variety of computational 

tools and guidance that will significantly reduce the time needed to develop and certify new 

Aeronautics
Education

Ø Proposes to terminate NASA’s Office of Education, including its 

portfolio of grants and cooperative agreements and redirects funds to 

NASA’s core mission of exploration. NASA headquarters will continue 

to be accountable for strategic direction and coordination of the 

agency’s STEM engagement efforts.

Ø Continues internships, fellowships, and outreach activities funded 

outside the Office of Education. 

Ø SMD’s Science Activation program will continue to focus on delivering 

SMD content to learners of all ages through cooperative agreement 

awards.

24
Safety, Security, and Mission Services 

and Construction 

Ø Safety, Security, and Mission Services

• Funds ongoing operations of NASA Centers and major component 

facilities to achieve a safe, healthy, and environmentally responsible 

workplace.

• Provides independent technical and safety oversight of NASA 

missions and operations.

• Ensures core services are ready and available for performing 

mission roles and responsibilities by optimizing acquisition, human 

capital management, budget management, and facilities 

management to maintain a minimum set of capabilities.

• Provides strategic IT investments to improve security, reduce costs, 

and increase efficiency by modernizing systems, increasing 

automation, and delivering affordable enterprise-wide solution.

($M) 2019 2020 2021 2022 2023

SSMS $2,750 $2,745 $2,739 $2,732 $2,726

Construction	&	ECR $388 $294 $294 $294 $294

Outyears	are	notional

• Strengthens cybersecurity capabilities by safeguarding critical systems and data plus continues to support improved 

overall management of IT.

Ø Construction and Environmental Compliance and Restoration

• Funds repair, revitalization, demolition, and recapitalization projects that reduce the Agency’s footprint and provide 

efficient, modernized facilities.

• Invests in energy savings projects to reduce utility usage and costs. 

• Constructs new or modified facilities to conduct NASA’s program missions.

• Manages NASA’s environmental clean-up responsibilities. 25
26
Organizational and Budget Alignment

27

NASA will restructure the Agency to align with the Administration’s 

Exploration Campaign focus. NASA will assess options and be prepared for 

implementation at the start of FY 2019. 

NASA is proposing several budget structure changes to align with its 

Exploration focus and reorient space technology to serve exploration needs:

Ø Exploration account is renamed Deep Space Exploration Systems

Ø Exploration Research and Development Theme goes away and is 

replaced by Advanced Exploration Systems Theme

Ø ER&D content is dispersed to: AES (habitats, Lunar Orbiting platform - gateway) and 

ER&T account (some of AES and HRP)

Ø Space Technology account plus HRP and elements of AES is merged 

into the new Exploration Research and Technology account

Ø Space Operations account is renamed LEO and Space Flight 

Operations with same content plus new Commercial LEO development 

theme.
Acronyms

• AES: Advanced Exploration Systems

• CRS: Cargo Resupply Services

• DART: Double Asteroid Redirection Test

• DSAC: Deep Space Atomic Clock

• DSG: Deep Space Gateway

• ECOSTRESS: Ecosystem Spaceborne Thermal Radiometer 

Experiment on Space Station

• EGS: Exploration Ground Systems

• EVI: Earth Venture Instrument

• EVM: Earth Venture Mission

• EVS: Earth Venture Sub-Orbital solicitation

• GEDI: Global Ecosystem Dynamics Investigation

• GeoCarb: Geostationary Carbon Cycle Observatory

• GOES: Geostationary Operational Environmental Satellite

• GOLD: Global Scale Observations of the Limb and Disk

• GPIM: Green Propellant Infusion Mission

• GRACE-FO: Gravity Recovery and Climate Experiment –

Follow-On

• GUSTO: Galactic/extragalactic ULDB Spectroscopic 

Terahertz Observatory

• ICESat: Ice Cloud and Land Elevation Satellite

• ICON: Ionospheric Connection Explorer

• ICPS: Interim Cryogenic Propulsion Stage

• ISS: International Space Station

• IXPE: Imaging X-ray Polarimetry Explorer

• JPSS: Joint Polar Satellite System

• JUICE: Jupiter Icy Moons Explorer

• JWST: James Webb Space Telescope

• LBFD: Low-Boom Flight Demonstration

• LCRD: Laser Communications Relay Demonstration

• LEO: Low-Earth Orbit

• LVSA: Launch Vehicle Stage Adapter

• LWS: Living With a Star

• MAIA: Multi-Angle Imager for Aerosols

• MEDA: Mars Environmental Dynamics Analyzer

• MEDLI2: Mars Entry, Descent, and Landing Instrumentation 2

• MetOp – Meteorological Operational Satellite

• MoO: Missions-of-Opportunity

• MOXIE: Mars Oxygen In-Situ Resource Utilization Experiment

• NextSTEP: Next Space Technologies for Exploration Partnership

• NISAR: NASA-ISRO Synthetic Aperture Radar

• OMPS: Ozone Mapping Profiler Suite

• OSIRIS-Rex: Origins, Spectral Interpretation, Resource 

Identification, Security, Regolith Explorer

• PSP: Parker Solar Probe

• SBIR: Small Business Innovation Research

• SLS: Space Launch System

• SMD: Science Mission Directorate

• SMEX: Small Explorer class

• SOC: Solar Orbiter Collaboration

• STEM: Science, Technology, Engineering and Mathematics

• STP: Solar Terrestrial Probes

• STTR: Small business Technology Transfer

• SWOT: Surface Water and Ocean Topography

• TDM: Technology Demonstration Mission

• TEMPO: Tropospheric Emissions Monitoring of Pollution

• TESS: Transiting Exoplanet Survey Satellite

• TRN: Terrain Relative Navigation

• TROPICS: Time-Resolved Observations of Precipitation structure 

and storm Intensity with a Constellation of Smallsats

• TSIS: Total and Spectral Solar Irradiance Sensor

• UAS: Unmanned Aircraft Systems

• XARM: X-ray Astronomy Recovery Mission

• WFIRST: Wide Field Infra Red Survey telescope (AFTA: 

Astrophysics Focused Telescope Assets)

28