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By NASA
5 Min Read NASA Langley’s Legacy of Landing
The first image of the Moon taken by the cameras on the Lunar Orbiter in 1966. Credits: NASA Landing safely on the surface of another planetary body, like the Moon or Mars, is one of the most important milestones of any given space mission. From the very beginning, NASA’s Langley Research Center has been at the heart of the entry, descent and landing (EDL) research that enables our exploration. Today, NASA Langley’s legacy of landing continues at the forefront of present day lunar missions and as NASA prepares for future travel to more distant worlds.
Project Mercury: 1958
Project Mercury was the United States’ first human-in-space program, led by NASA’s Space Task Group located at NASA Langley. There were five major programs of study and experimentation.
An airdrop study that helped us understand the characteristics of the Mercury capsule as it returned to Earth. A group of study focused on the escape systems, ultimately becoming known as the launch abort system. Exhaustive wind-tunnel studies of the blunt-nosed capsule design and its aerodynamic stability at various altitudes and speeds and angles of reentry, all with a focus on making the capsule safe and stable. A study on the problem of landing impact, resulting in the development of absorption systems that minimized the shock of impact to the capsule’s pilot. Studies into the use of drogue parachutes and their characteristics at high altitudes and speeds, ensuring that they would be able to stabilize and slow the capsule’s descent for a safe landing. All of this research went on to inform the subsequent Gemini and Apollo programs. All of this research went on to inform the subsequent Gemini and Apollo programs.
Apollo Program: 1962
In 1961, President John F. Kennedy committed to putting Americans on the surface of the Moon and shortly after that historic declaration, NASA’s Apollo program was born. In the years that followed, the original team of NASA astronauts completed their basic training at NASA Langley’s Lunar Landing Research Facility (LLRF). When Apollo 11 successfully landed the first humans on the Moon in 1969, NASA Langley had played a pivotal role in the monumental success.
Lunar Orbiter: 1966
The Lunar Orbiter missions launched with the purpose of mapping the lunar surface and identifying potential landing sites ahead of the Apollo landings. From 1966 to 1967, the five successful Lunar Orbiter missions, led and managed by Langley Research Center, resulted in 99% of the moon photographed and a suitable site selected for the upcoming human landings.
Viking: 1976
After the success of Apollo, NASA set its sights further across the solar system to Mars. Two Viking missions aimed to successfully place landers on the Red Planet and capture high resolution images of the Martian surfaces, assisting in the search for life. Langley Research Center was chosen to lead this inaugural Mars mission and went on to play key roles in the missions to Mars that followed.
HIAD: 2009 – Present
Successful landings on Mars led to more ambitious dreams of landing larger payloads, including those that could support future human exploration. In order to land those payloads safely, a new style of heat shield would be needed. Hypersonic Inflatable Aerodynamic Decelerator (HIAD) technology was positioned as an answer to the payload problem, enabling missions to use inflatable heat shields to slow down and protect a payload as it enters a planet’s atmosphere at hypersonic speeds.
IRVE – 2009-2012
Two successful Inflatable Reentry Vehicle Experiments (IRVE) proved the capability of inflatable heat shield technology and opened the door for larger iterations.
LOFTID – 2022
The Low Earth Orbit Flight Test of an Inflatable Decelerator (LOFTID) followed in the footsteps of its predecessor IRVE with a larger aeroshell that could be deployed to a scale much larger than the shroud. The 2022 successful test of this technology further proved the capability of HIAD technology.
MEDLI 1 and 2: 2012 & 2020
As a part of the Mars Science Laboratory (MSL) mission, NASA Langley’s Mars Entry, Descent and Landing Instrument (MEDLI) was designed to gather data from the MSL entry vehicle’s heatshield during its entry and descent to the surface of Mars. MEDLI2 expanded on that groundbreaking data during the Mars 2020 mission which safely landed the Perseverance rover after successfully entering the planet’s arid atmosphere, and enabling improvements on the design for future entry systems.
Curiosity Rover
Curiosity was the largest and most capable rover ever sent to Mars when it launched in 2011. Leading up the mission, Langley engineers performed millions of simulations of the entry, descent and landing phase — or the so-called “Seven Minutes of Terror” — that determines success or failure. Curiosity continues to look for signs that Mars once was – or still is – a habitable place for life as we know it.
CLPS: 2023 – Present
The Commercial Lunar Payload Services initiative takes the Artemis mission further by working with commercial partners to advance the technology needed to return humans to the Moon and enable humanity to explore Mars.
NDL
Navigation Doppler Lidar (NDL) technology, developed at Langley Research Center, uses lasers to assist spacecraft in identifying safe locations to land. In 2024, NDL flew on the Intuitive Machines’ uncrewed Nova-C lander, with its laser instruments designed to measure velocity and altitude to within a few feet. While NASA planetary landers have traditionally relied on radar and used radio waves, NDL technology has proven more accurate and less heavy, both major benefits for cost and space savings as we continue to pursue planetary missions.
SCALPSS
Like Lunar Orbiter and the Viking missions before it, Stereo Cameras for Lunar Plume Surface Studies (SCALPSS) set out to better understand the surface of another celestial body. These cameras affixed to the bottom of a lunar lander focus on the interaction between the lander’s rocket plumes and the lunar surface. The SCALPSS 1.1 instrument captured first-of-its-kind imagery as the engine plumes of Firefly’s Blue Ghost lander reached the Moon’s surface. These images will serve as key pieces of data as trips to the Moon increase in the coming years.
About the Author
Angelique Herring
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Last Updated Apr 03, 2025 EditorAngelique HerringContactJoseph Scott Atkinsonjoseph.s.atkinson@nasa.govLocationNASA Langley Research Center Related Terms
General Langley Research Center Explore More
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By European Space Agency
The European Space Agency (ESA) has selected Airbus to design and build the landing platform for the ExoMars Rosalind Franklin rover. In 2028, ESA will launch this ambitious exploration mission to search for past and present signs of life on Mars.
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
A NASA F/A-18 research aircraft flies above California near NASA’s Armstrong Flight Research Center in Edwards, California, testing a commercial precision landing technology for future space missions. The Psionic Space Navigation Doppler Lidar (PSNDL) system is installed in a pod located under the right wing of the aircraft.NASA Nestled in a pod under an F/A-18 Hornet aircraft wing, flying above California, and traveling up to the speed of sound, NASA put a commercial sensor technology to the test. The flight tests demonstrated the sensor accuracy and navigation precision in challenging conditions, helping prepare the technology to land robots and astronauts on the Moon and Mars.
The Psionic Space Navigation Doppler Lidar (PSNDL) system is rooted in NASA technology that Psionic, Inc. of Hampton, Virginia, licensed and further developed. They miniaturized the NASA technology, added further functionality, and incorporated component redundancies that make it more rugged for spaceflight. The PSNDL navigation system also includes cameras and an inertial measurement unit to make it a complete navigation system capable of accurately determining a vehicle’s position and velocity for precision landing and other spaceflight applications.
NASA engineers and technicians install the Psionic Space Navigation Doppler Lidar (PSNDL) system into a testing pod on a NASA F/A-18 research aircraft ahead of February 2025 flight tests at NASA’s Armstrong Flight Research Center in Edwards, California.NASA The aircraft departed from NASA’s Armstrong Flight Research Center in Edwards, California, and conducted a variety of flight paths over several days in February 2025. It flew a large figure-8 loop and conducted several highly dynamic maneuvers over Death Valley, California, to collect navigation data at various altitudes, velocities, and orientations relevant for lunar and Mars entry and descent. Refurbished for these tests, the NASA F/A-18 pod can support critical data collection for other technologies and users at a low cost.
Doppler Lidar sensors provide a highly accurate measurement of speed by measuring the frequency shift between laser light emitted from the sensor reflected from the ground. Lidar are extremely useful in sunlight-challenged areas that may have long shadows and stark contrasts, such as the lunar South Pole. Pairing PSNDL with cameras adds the ability to visually compare pictures with surface reconnaissance maps of rocky terrain and navigate to landing at interesting locations on Mars. All the data is fed into a computer to make quick, real-time decisions to enable precise touchdowns at safe locations.
Psionic Space Navigation Doppler Lidar (PSNDL) system installed in a testing pod on a NASA F/A-18 research aircraft ahead of February 2025 flight tests at NASA’s Armstrong Flight Research Center in Edwards, California.NASA Since licensing NDL in 2016, Psionic has received funding and development support from NASA’s Space Technology Mission Directorate through its Small Business Innovative Research program and Tipping Point initiative. The company has also tested PSNDL prototypes on suborbital vehicles via the Flight Opportunities program. In 2024, onboard a commercial lunar lander, NASA successfully demonstrated the predecessor NDL system developed by the agency’s Langley Research Center in Hampton, Virginia.
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Last Updated Mar 26, 2025 EditorLoura Hall Related Terms
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By NASA
4 Min Read NASA Cameras on Blue Ghost Capture First-of-its-Kind Moon Landing Footage
This compressed, resolution-limited video features a preliminary sequence of the Blue Ghost final descent and landing that NASA researchers stitched together from SCALPSS 1.1’s four short-focal-length cameras, which were capturing photos at 8 frames per second. Altitude data is approximate. Credits: NASA/Olivia Tyrrell A team at NASA’s Langley Research Center in Hampton, Virginia, has captured first-of-its-kind imagery of a lunar lander’s engine plumes interacting with the Moon’s surface, a key piece of data as trips to the Moon increase in the coming years under the agency’s Artemis campaign.
The Stereo Cameras for Lunar-Plume Surface Studies (SCALPSS) 1.1 instrument took the images during the descent and successful soft landing of Firefly Aerospace’s Blue Ghost lunar lander on the Moon’s Mare Crisium region on March 2, as part of NASA’s Commercial Lunar Payload Services (CLPS) initiative.
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This compressed, resolution-limited video features a preliminary sequence of the Blue Ghost final descent and landing that NASA researchers stitched together from SCALPSS 1.1’s four short-focal-length cameras, which were capturing photos at 8 frames per second. Altitude data is approximate.NASA/Olivia Tyrrell The compressed, resolution-limited video features a preliminary sequence that NASA researchers stitched together from SCALPSS 1.1’s four short-focal-length cameras, which were capturing photos at 8 frames per second during the descent and landing.
The sequence, using approximate altitude data, begins roughly 91 feet (28 meters) above the surface. The descent images show evidence that the onset of the interaction between Blue Ghost’s reaction control thruster plumes and the surface begins at roughly 49 feet (15 meters). As the descent continues, the interaction becomes increasingly complex, with the plumes vigorously kicking up the lunar dust, soil and rocks — collectively known as regolith. After touchdown, the thrusters shut off and the dust settles. The lander levels a bit and the lunar terrain beneath and immediately around it becomes visible.
Although the data is still preliminary, the 3000-plus images we captured appear to contain exactly the type of information we were hoping for…
Rob Maddock
SCALPSS project manager
“Although the data is still preliminary, the 3000-plus images we captured appear to contain exactly the type of information we were hoping for in order to better understand plume-surface interaction and learn how to accurately model the phenomenon based on the number, size, thrust and configuration of the engines,” said Rob Maddock, SCALPSS project manager. “The data is vital to reducing risk in the design and operation of future lunar landers as well as surface infrastructure that may be in the vicinity. We have an absolutely amazing team of scientists and engineers, and I couldn’t be prouder of each and every one of them.”
As trips to the Moon increase and the number of payloads touching down in proximity to one another grows, scientists and engineers need to accurately predict the effects of landings. Data from SCALPSS will better inform future robotic and crewed Moon landings.
The SCALPSS 1.1 technology includes six cameras in all, four short focal length and two long focal length. The long-focal-length cameras allowed the instrument to begin taking images at a higher altitude, prior to the onset of the plume-surface interaction, to provide a more accurate before-and-after comparison of the surface. Using a technique called stereo photogrammetry, the team will later combine the overlapping images – one set from the long-focal-length cameras, another from the short focal length – to create 3D digital elevation maps of the surface.
This animation shows the arrangement of the six SCALPSS 1.1 cameras and the instrument’s data storage unit. The cameras are integrated around the base of the Blue Ghost lander. Credit: NASA/Advanced Concepts Lab The instrument is still operating on the Moon and as the light and shadows move during the long lunar day, it will see more surface details under and immediately around the lander. The team also hopes to capture images during the transition to lunar night to observe how the dust responds to the change.
“The successful SCALPSS operation is a key step in gathering fundamental knowledge about landing and operating on the Moon, and this technology is already providing data that could inform future missions,” said Michelle Munk, SCALPSS principal investigator.
The successful SCALPSS operation is a key step in gathering fundamental knowledge about landing and operating on the Moon, and this technology is already providing data that could inform future missions
Michelle Munk
SCALPSS principal investigator
It will take the team several months to fully process the data from the Blue Ghost landing. They plan to issue raw images from SCALPSS 1.1 publicly through NASA’s Planetary Data System within six months.
The team is already preparing for its next flight on Blue Origin’s Blue Moon lander, scheduled to launch later this year. The next version of SCALPSS is undergoing thermal vacuum testing at NASA Langley ahead of a late-March delivery to Blue Origin.
The SCALPSS 1.1 project is funded by the Space Technology Mission Directorate’s Game Changing Development program.
NASA is working with several American companies to deliver science and technology to the lunar surface under the CLPS initiative. Through this opportunity, various companies from a select group of vendors bid on delivering payloads for NASA including everything from payload integration and operations, to launching from Earth and landing on the surface of the Moon.
About the Author
Joe Atkinson
Public Affairs Officer, NASA Langley Research Center
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Last Updated Mar 13, 2025 Related Terms
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By European Space Agency
Marking another step towards new insights into Earth’s forests and their role in the carbon cycle, ESA’s groundbreaking Biomass satellite has arrived at Europe's Spaceport in French Guiana, to be prepared for liftoff on a Vega-C rocket at the end of April.
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