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By NASA
5 Min Read NASA and Italian Space Agency Test Future Lunar Navigation Technology
The potentially record-breaking Lunar GNSS Receiver Experiment (LuGRE) payload will be the first known demonstration of GNSS signal reception on and around the lunar surface. Credits: NASA/Dave Ryan As NASA celebrates 55 years since the historic Apollo 11 crewed lunar landing, the agency also is preparing new navigation and positioning technology for the Artemis campaign, the agency’s modern lunar exploration program.
A technology demonstration helping pave the way for these developments is the Lunar GNSS Receiver Experiment (LuGRE) payload, a joint effort between NASA and the Italian Space Agency to demonstrate the viability of using existing GNSS (Global Navigation Satellite System) signals for positioning, navigation, and timing on the Moon.
During its voyage on an upcoming delivery to the Moon as part of NASA’s CLPS (Commercial Lunar Payload Services) initiative, LuGRE would demonstrate acquiring and tracking signals from both the U.S. GPS and European Union Galileo GNSS constellations during transit to the Moon, during lunar orbit, and finally for up to two weeks on the lunar surface itself.
The Lunar GNSS Receiver Experiment (LuGRE) will investigate whether signals from two Global Navigation Satellite System (GNSS) constellations, the U.S. Global Positioning System (GPS) and European Union’s Galileo, can be tracked at the Moon and used for positioning, navigation, and timing (PNT). The LuGRE payload is one of the first demonstrations of GNSS signal reception and navigation on and around the lunar surface, an important milestone for how lunar missions will access navigation and positioning technology. If successful, LuGRE would demonstrate that spacecraft can use signals from existing GNSS satellites at lunar distances, reducing their reliance on ground-based stations on the Earth for lunar navigation.
Today, GNSS constellations support essential services like navigation, banking, power grid synchronization, cellular networks, and telecommunications. Near-Earth space missions use these signals in flight to determine critical operational information like location, velocity, and time.
NASA and the Italian Space Agency want to expand the boundaries of GNSS use cases. In 2019, the Magnetospheric Multiscale (MMS) mission broke the world record for farthest GPS signal acquisition 116,300 miles from the Earth’s surface — nearly half of the 238,900 miles between Earth and the Moon. Now, LuGRE could double that distance.
“GPS makes our lives safer and more viable here on Earth,” said Kevin Coggins, NASA deputy associate administrator and SCaN (Space Communications and Navigation) Program manager at NASA Headquarters in Washington. “As we seek to extend humanity beyond our home planet, LuGRE should confirm that this extraordinary technology can do the same for us on the Moon.”
NASA, Firefly, Qascom, and Italian Space Agency team members examine LuGRE hardware in a clean room.Firefly Aerospace Reliable space communication and navigation systems play a vital role in all NASA missions, providing crucial connections from space to Earth for crewed and uncrewed missions alike. Using a blend of government and commercial assets, NASA’s Near Space and Deep Space Networks support science, technology demonstrations, and human spaceflight missions across the solar system.
“This mission is more than a technological milestone,” said Joel Parker, policy lead for positioning, navigation, and timing at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “We want to enable more and better missions to the Moon for the benefit of everyone, and we want to do it together with our international partners.”
This mission is more than a technological milestone. We want to enable more and better missions to the Moon for the benefit of everyone…
JOEL PARKER
PNT Policy Lead at NASA's Goddard Space Flight Center
The data-gathering LuGRE payload combines NASA-led systems engineering and mission management with receiver software and hardware developed by the Italian Space Agency and their industry partner Qascom — the first Italian-built hardware to operate on the lunar surface.
Any data LuGRE collects is intended to open the door for use of GNSS to all lunar missions, not just those by NASA or the Italian Space Agency. Approximately six months after LuGRE completes its operations, the agencies will release its mission data to broaden public and commercial access to lunar GNSS research.
Firefly Aerospace’s Blue Ghost Mission One lander is carrying 10 NASA science and technology instruments to the Moon as part of NASA’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign.Firefly Aerospace “A project like LuGRE isn’t about NASA alone,” said NASA Goddard navigation and mission design engineer Lauren Konitzer. “It’s something we’re doing for the benefit of humanity. We’re working to prove that lunar GNSS can work, and we’re sharing our discoveries with the world.”
The LuGRE payload is one of 10 NASA-funded science experiments launching to the lunar surface on this delivery through NASA’s CLPS initiative. Through CLPS, NASA works with American companies to provide delivery and quantity contracts for commercial deliveries to further lunar exploration and the development of a sustainable lunar economy. As of 2024, the agency has 14 private partners on contract for current and future CLPS missions.
Demonstrations like LuGRE could lay the groundwork for GNSS-based navigation systems on the lunar surface. Bridging these existing systems with emerging lunar-specific navigation solutions has the potential to define how all spacecraft navigate lunar terrain in the Artemis era.
Artist’s concept rendering of LuGRE aboard the Blue Ghost lunar lander receiving signals from Earth’s GNSS constellations.NASA/Dave Ryan The payload is a collaborative effort between NASA’s Goddard Space Flight Center and the Italian Space Agency. Funding and oversight for the LuGRE payload comes from the agency’s SCaN Program office. It was chosen by NASA as one of 10 funded research and technology demonstrations for delivery to the lunar surface by Firefly Aerospace Inc, a flight under the agency’s CLPS initiative.
About the Author
Korine Powers
Senior Writer and Education LeadKorine Powers, Ph.D. is a writer for NASA's Space Communications and Navigation (SCaN) program office and covers emerging technologies, commercialization efforts, education and outreach, exploration activities, and more.
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Last Updated Jan 09, 2025 EditorGoddard Digital TeamContactKorine Powerskorine.powers@nasa.govLocationNASA Goddard Space Flight Center Related Terms
Goddard Space Flight Center Artemis Blue Ghost (lander) Commercial Lunar Payload Services (CLPS) Communicating and Navigating with Missions Earth's Moon Near Space Network Space Communications & Navigation Program View the full article
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By NASA
On Jan. 9, 1990, space shuttle Columbia took off on its ninth flight, STS-32, from NASA’s Kennedy Space Center (KSC) in Florida. Its five-person crew of Commander Daniel Brandenstein, Pilot James Wetherbee, and Mission Specialists Bonnie Dunbar, Marsha Ivins, and David Low flew a then record-breaking 11-day mission to deploy the Syncom IV-F5 communications satellite for the U.S. Navy and retrieve the Long-Duration Exposure Facility (LDEF). Astronauts aboard a shuttle mission in 1984 deployed the LDEF and scientists eagerly awaited the return of their 57 experiments to study the effects of nearly six years exposure to the low Earth orbit environment. The crew also conducted several middeck experiments in biotechnology and materials processing and used an echocardiograph to study changes in their hearts.
The STS-32 crew of Mission Specialist Bonnie Dunbar, left, Commander Daniel Brandenstein, Pilot James Wetherbee, and Mission Specialists Marsha Ivins and David Low. The STS-32 crew patch. The Long Duration Exposure Facility during its deployment on the STS-41C mission in 1984. In November 1988, NASA announced Brandenstein, Wetherbee, Dunbar, Ivins, and Low as the STS-32 crew for the flight then planned for November 1989. Brandenstein, from the Class of 1978, had flown twice before, as pilot on STS-8 in August-September 1983 and commander of STS-51G in June 1985. Dunbar, selected in 1980, had flown once before on STS-61A in October-November 1985. For Wetherbee, Ivins, and Low, all selected in 1984, STS-32 marked their first spaceflight. During the second day of their planned 10-day mission, the astronauts would deploy the Syncom IV-F5, also known as Leasat-5, communications satellite for the U.S. Navy. The main focus of the flight involved the retrieval of LDEF, deployed by the STS-41C crew in April 1984. The original plan had LDEF, containing 57 science and technology experiments, retrieved by the STS-51D crew in February 1985. Delays in the shuttle program first pushed the retrieval to STS-61I in September 1986, and then the Challenger accident delayed it to STS-32. The facility ended up staying in orbit nearly six years instead of the originally intended 10 months. The crew rounded out the mission by conducting a series of middeck science and medical experiments.
Space shuttle Columbia rolls out to its launch pad on a foggy morning. NASA scientist John Charles, at rear, trains astronauts David Low, left, and Bonnie Dunbar, supine, in the operation of a cardiovascular experiment. The STS-32 crew exits crew quarters for the ride to Launch Pad 39A. Columbia returned to KSC on Aug. 21, 1989, following STS-28’s landing at Edwards Air Force Base (AFB) in California, and workers towed it to the Orbiter Processing Facility (OPF) the next day. They made 26 modifications to the orbiter, including the installation of the Remote Manipulator System (RMS), or robotic arm, and a fifth set of liquid hydrogen and liquid oxygen tanks to extend the vehicle’s duration in space. Rollover to the nearby Vehicle Assembly Building took place on Nov. 16, where Columbia joined its External Tank and twin Solid Rocket Boosters (SRB) on refurbished Mobile Launch Platform 3, last used in 1975. Rollout took place on Nov. 28 to Launch Pad 39A, newly refurbished since its previous launch in 1986.
On Dec. 1, engineers and the astronaut crew completed the Terminal Countdown Demonstration Test, a dress rehearsal for the planned Dec. 18 launch. Based on that date and the mission’s planned 10-day duration, the STS-32 crew would have spent Christmas in space, only the third American crew and the first space shuttle crew to do so. However, unfinished work on Pad 39A delayed the launch into January 1990. Trajectory specialists had estimated that due to orbital decay, LDEF would reenter the Earth’s atmosphere by March 1990, so a timely launch remained crucial for mission success. The countdown began on Jan. 4 for an expected Jan. 8 launch, with the crew arriving at KSC on Jan. 5.
Liftoff of space shuttle Columbia on STS-32. The deployment of the Syncom IV-F5 satellite. Syncom following deployment. Cloudy skies scrubbed the first launch attempt on Jan. 8. Liftoff took place the next day at 7:35 a.m. EST from Launch Pad 39A, with LDEF 1,500 miles ahead of Columbia. The powered ride to space took 8.5 minutes, placing Columbia into a 215-by-38-mile orbit. A burn of the two Orbiter Maneuvering System (OMS) engines 40 minutes later changed the orbit to the desired 222-by-180-mile altitude. The crew opened the shuttle’s payload bay doors and deployed its radiators. The major activities for the first day in space involved the checkout of the RMS and the first rendezvous maneuver in preparation for the LDEF grapple three days later. The astronauts also activated four of the middeck experiments. On the mission’s second day, Low deployed the 15,000-pound Syncom satellite, releasing it in a frisbee motion out of the payload bay. The satellite extended its antenna, stabilized itself, and 40 minutes after deployment, fired its engine for the first burn to send it to its geostationary orbit.
The Long Duration Exposure Facility (LDEF) during the rendezvous. STS-32 astronaut Bonnie Dunbar has grappled LDEF with the Remote Manipulator System. Dunbar lowers LDEF into the payload bay. Following the Syncom deploy, the crew turned its attention to the rendezvous with LDEF while also continuing the middeck experiments. On Flight Day 3, they completed three rendezvous burns as they steadily continued their approach to LDEF. Soon after awakening on Flight Day 4, the astronauts spotted LDEF appearing as a bright star. After the first of four rendezvous burns, Columbia’s radar locked onto the satellite. As they continued the approach, with three more burns carried out successfully, Dunbar activated the RMS in preparation for the upcoming grapple. Brandenstein took over manual control of Columbia for the final approach and parked the shuttle close enough to LDEF for Dunbar to reach out with the 50-foot arm and grapple the satellite. Brandenstein reported, “We have LDEF.”
For the next four hours, with Wetherbee flying the orbiter and Dunbar operating the arm, Ivins performed a comprehensive photo survey of LDEF, documenting the effects of nearly six years of space exposure on the various experiments. The survey completed, Dunbar slowly and carefully lowered LDEF into the payload bay, and five latches secured it in place for the ride back to Earth. With the two major goals of their mission completed, the astronauts settled down for the remainder of their 10-day mission conducting science experiments.
With astronaut David Low acting as an operator, astronaut Bonnie Dunbar serves as a subject for a cardiovascular experiment. Astronaut Marsha Ivins with several cameras testing the effects of spaceflight on different types of film. During the mission, the STS-32 crew conducted several middeck experiments. The Protein Crystal Growth experiment used vapor diffusion to grow 120 crystals of 24 different proteins, for study by scientists following their return to Earth. The Characterization of Neurospora Circadian Rhythm experiment studied whether spaceflight affected the daily cycles of pink bread mold. The Fluid Experiment Apparatus performed materials processing research in the microgravity environment. The astronauts used the American Flight Echocardiograph (AFE) to study changes in their hearts as a result of weightlessness. The crew used the large format IMAX camera to film scenes inside the cabin as well as through the windows, such as the capture of LDEF.
Astronaut Daniel Brandenstein holds an inflatable plastic cake given to him by his crew mates in honor of his birthday. The STS-32 crew poses in Columbia’s middeck. On Jan. 17, Brandenstein celebrated his 47th birthday, the fifth American astronaut to do so in space. His crew presented him with an inflatable plastic cake including candles while controllers in Mission Control passed on their birthday wishes as did his wife and teenage daughter. On the same day, NASA announced the selection of its 13th group of astronauts. Among them, engineer Ronald Sega, Dunbar’s husband, as well as the first female shuttle pilot, Eileen Collins, and the first Hispanic woman astronaut, Ellen Ochoa.
Columbia touches down at Edwards Air Force Base in California. At the welcome home ceremony at Ellington Field in Houston, director of NASA’s Johnson Space Center Aaron Cohen addresses the crowd as the STS-32 astronauts and their families listen. On Jan. 19, the astronauts awakened for their planned final day in space. However, due to fog at their landing site, Edwards AFB in California, Mission Control first informed them that they would have to spend an extra orbit in space, and finally decided to delay the landing by an entire day. With their experiments already packed, the crew spent a quiet day, looking at the Earth and using up what film still remained. As they slept that night, they passed the record for the longest space shuttle mission, set by STS-9 in 1983.
In preparation for reentry, the astronauts donned their orange spacesuits and closed the payload bay doors. A last-minute computer problem delayed reentry by one orbit, then Brandenstein and Wetherbee oriented Columbia into the deorbit attitude, with the OMS engines facing in the direction of travel. Over the Indian Ocean, they fired the two engines for 2 minutes 48 seconds to bring the spacecraft out of orbit. They reoriented the orbiter to fly with its heat shield exposed to the direction of flight as it encountered Earth’s atmosphere at 419,000 feet. The buildup of ionized gases caused by the heat of reentry prevented communications for about 15 minutes but provided the astronauts a great light show. After completing the Heading Alignment Circle turn, Brandenstein aligned Columbia with the runway, and Wetherbee lowered the landing gear. Columbia touched down and rolled to a stop, making the third night landing of the shuttle program and ending a 10-day 21-hour 1-minute flight, the longest shuttle flight up to that time, having completed 172 orbits of the Earth.
Other records set by the astronauts on this mission included Brandenstein as the new record holder for most time spent in space by a shuttle crew member – 24 days – and Dunbar accumulating the most time in space by a woman – 18 days – up to that time. Following eight hours of postflight medical testing, the astronauts boarded a jet bound for Houston’s Ellington Field, where they reunited with their families and took part in a welcome home ceremony led by Aaron Cohen, director of NASA’s Johnson Space Center.
Columbia returns to NASA’s Kennedy Space Center in Florida atop the Shuttle Carrier Aircraft. Workers lift the Long Duration Exposure Facility from Columbia’s payload bay. Following postlanding inspections, workers placed Columbia, with LDEF still cradled in its payload bay, atop a Shuttle Carrier Aircraft, a modified Boeing-747, and the combination left Edwards on Jan. 25. Following a refueling stop at Monthan Davis AFB in Tucson, an overnight stay at Kelly AFB in San Antonio, and another refueling stop at Eglin AFB in Fort Walton Beach, Florida, Columbia and LDEF arrived back at KSC on Jan. 26. The next day, workers towed Columbia to the OPF and on Jan. 30 lifted LDEF out of its payload bay, in preparation for the detailed study of the effects of nearly six years in space on the 57 experiments it carried. Meanwhile, workers began to prepare Columbia for its next flight, STS-35 in December 1990.
Enjoy the crew narrate a video of the STS-32 mission. Read Brandenstein‘s and Dunbar‘s recollections of the STS-32 mission in their oral histories with the JSC History Office. For an overview of the LDEF project, enjoy this video. For detailed information on the results of the LDEF experiments, follow this link.
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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
The Radiation Tolerant Computer, or RadPC, payload undergoes final checkout at Montana State University in Bozeman, which leads the payload project. RadPC is one of 10 NASA payloads set to fly aboard the next delivery for NASA’s CLPS (Commercial Lunar Payload Services) initiative in 2025. RadPC prototypes previously were tested aboard the International Space Station and Earth-orbiting satellites, but the technology demonstrator will undergo its biggest trial in transit to the Moon – passing through the Earth’s Van Allen radiation belts – and during its roughly two-week mission on the lunar surface. Photo courtesy Firefly Aerospace Onboard computers are critical to space exploration, aiding nearly every spacecraft function from propulsion and navigation systems to life support technology, science data retrieval and analysis, communications, and reentry.
But computers in space are susceptible to ionizing solar and cosmic radiation. Just one high-energy particle can trigger a so-called “single event effect,” causing minor data errors that lead to cascading malfunctions, system crashes, and permanent damage. NASA has long sought cost-effective solutions to mitigate radiation effects on computers to ensure mission safety and success.
Enter the Radiation Tolerant Computer (RadPC) technology demonstration, one of 10 NASA payloads set to fly aboard the next lunar delivery for the agency’s CLPS (Commercial Lunar Payload Services) initiative. RadPC will be carried to the Moon’s surface by Firefly Aerospace’s Blue Ghost 1 lunar lander.
Developed by researchers at Montana State University in Bozeman, RadPC aims to demonstrate computer recovery from faults caused by single event effects of ionizing radiation. The computer is designed to gauge its own real-time state of health by employing redundant processors implemented on off-the-shelf integrated circuits called field programmable gate arrays. These tile-like logic blocks are capable of being easily replaced following a confirmed ionizing particle strike. In the event of a radiation strike, RadPC’s patented recovery procedures can identify the location of the fault and repair the issue in the background.
As an added science benefit, RadPC carries three dosimeters to measure varying levels of radiation in the lunar environment with each tuned to different sensitivity levels. These dosimeters will continuously measure the interaction between Earth’s magnetosphere and the solar wind during its journey to the Moon. It will also provide detailed radiation information about Blue Ghost’s lunar landing site at Mare Crisium, which could help to safeguard future Artemis astronauts.
“This is RadPC’s first mission out into the wild, so to speak,” said Dennis Harris, who manages the payload for the CLPS initiative at NASA’s Marshall Space Flight Center in Huntsville, Alabama. “The RadPC CLPS payload is an exciting opportunity to verify a radiation-tolerant computer option that could make future Moon to Mars missions safer and more cost-effective.”
Under the CLPS model, NASA is investing in commercial delivery services to the Moon to enable industry growth and support long-term lunar exploration. As a primary customer for CLPS deliveries, NASA aims to be one of many customers on future flights. Marshall manages the development of seven of the 10 CLPS payloads carried on Firefly’s Blue Ghost lunar lander.
T
Learn more about. CLPS and Artemis at:
https://www.nasa.gov/clps
Alise Fisher
Headquarters, Washington
202-358-2546
Alise.m.fisher@nasa.gov
Headquarters, Washington
202-358-2546
Alise.m.fisher@nasa.gov
Corinne Beckinger
Marshall Space Flight Center, Huntsville, Ala.
256-544-0034
corinne.m.beckinger@nasa.gov
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Last Updated Jan 08, 2025 EditorBeth RidgewayContactCorinne M. Beckingercorinne.m.beckinger@nasa.govLocationMarshall Space Flight Center Related Terms
Commercial Lunar Payload Services (CLPS) Artemis Marshall Space Flight Center Explore More
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